--- /dev/null
+# configobj.py
+# A config file reader/writer that supports nested sections in config files.
+# Copyright (C) 2005-2010 Michael Foord, Nicola Larosa
+# E-mail: fuzzyman AT voidspace DOT org DOT uk
+# nico AT tekNico DOT net
+
+# ConfigObj 4
+# http://www.voidspace.org.uk/python/configobj.html
+
+# Released subject to the BSD License
+# Please see http://www.voidspace.org.uk/python/license.shtml
+
+# Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
+# For information about bugfixes, updates and support, please join the
+# ConfigObj mailing list:
+# http://lists.sourceforge.net/lists/listinfo/configobj-develop
+# Comments, suggestions and bug reports welcome.
+
+from __future__ import generators
+
+import os
+import re
+import sys
+
+from codecs import BOM_UTF8, BOM_UTF16, BOM_UTF16_BE, BOM_UTF16_LE
+
+
+# imported lazily to avoid startup performance hit if it isn't used
+compiler = None
+
+# A dictionary mapping BOM to
+# the encoding to decode with, and what to set the
+# encoding attribute to.
+BOMS = {
+ BOM_UTF8: ('utf_8', None),
+ BOM_UTF16_BE: ('utf16_be', 'utf_16'),
+ BOM_UTF16_LE: ('utf16_le', 'utf_16'),
+ BOM_UTF16: ('utf_16', 'utf_16'),
+ }
+# All legal variants of the BOM codecs.
+# TODO: the list of aliases is not meant to be exhaustive, is there a
+# better way ?
+BOM_LIST = {
+ 'utf_16': 'utf_16',
+ 'u16': 'utf_16',
+ 'utf16': 'utf_16',
+ 'utf-16': 'utf_16',
+ 'utf16_be': 'utf16_be',
+ 'utf_16_be': 'utf16_be',
+ 'utf-16be': 'utf16_be',
+ 'utf16_le': 'utf16_le',
+ 'utf_16_le': 'utf16_le',
+ 'utf-16le': 'utf16_le',
+ 'utf_8': 'utf_8',
+ 'u8': 'utf_8',
+ 'utf': 'utf_8',
+ 'utf8': 'utf_8',
+ 'utf-8': 'utf_8',
+ }
+
+# Map of encodings to the BOM to write.
+BOM_SET = {
+ 'utf_8': BOM_UTF8,
+ 'utf_16': BOM_UTF16,
+ 'utf16_be': BOM_UTF16_BE,
+ 'utf16_le': BOM_UTF16_LE,
+ None: BOM_UTF8
+ }
+
+
+def match_utf8(encoding):
+ return BOM_LIST.get(encoding.lower()) == 'utf_8'
+
+
+# Quote strings used for writing values
+squot = "'%s'"
+dquot = '"%s"'
+noquot = "%s"
+wspace_plus = ' \r\n\v\t\'"'
+tsquot = '"""%s"""'
+tdquot = "'''%s'''"
+
+# Sentinel for use in getattr calls to replace hasattr
+MISSING = object()
+
+__version__ = '4.7.1'
+
+try:
+ any
+except NameError:
+ def any(iterable):
+ for entry in iterable:
+ if entry:
+ return True
+ return False
+
+
+__all__ = (
+ '__version__',
+ 'DEFAULT_INDENT_TYPE',
+ 'DEFAULT_INTERPOLATION',
+ 'ConfigObjError',
+ 'NestingError',
+ 'ParseError',
+ 'DuplicateError',
+ 'ConfigspecError',
+ 'ConfigObj',
+ 'SimpleVal',
+ 'InterpolationError',
+ 'InterpolationLoopError',
+ 'MissingInterpolationOption',
+ 'RepeatSectionError',
+ 'ReloadError',
+ 'UnreprError',
+ 'UnknownType',
+ 'flatten_errors',
+ 'get_extra_values'
+)
+
+DEFAULT_INTERPOLATION = 'configparser'
+DEFAULT_INDENT_TYPE = ' '
+MAX_INTERPOL_DEPTH = 10
+
+OPTION_DEFAULTS = {
+ 'interpolation': True,
+ 'raise_errors': False,
+ 'list_values': True,
+ 'create_empty': False,
+ 'file_error': False,
+ 'configspec': None,
+ 'stringify': True,
+ # option may be set to one of ('', ' ', '\t')
+ 'indent_type': None,
+ 'encoding': None,
+ 'default_encoding': None,
+ 'unrepr': False,
+ 'write_empty_values': False,
+}
+
+
+
+def getObj(s):
+ global compiler
+ if compiler is None:
+ import compiler
+ s = "a=" + s
+ p = compiler.parse(s)
+ return p.getChildren()[1].getChildren()[0].getChildren()[1]
+
+
+class UnknownType(Exception):
+ pass
+
+
+class Builder(object):
+
+ def build(self, o):
+ m = getattr(self, 'build_' + o.__class__.__name__, None)
+ if m is None:
+ raise UnknownType(o.__class__.__name__)
+ return m(o)
+
+ def build_List(self, o):
+ return map(self.build, o.getChildren())
+
+ def build_Const(self, o):
+ return o.value
+
+ def build_Dict(self, o):
+ d = {}
+ i = iter(map(self.build, o.getChildren()))
+ for el in i:
+ d[el] = i.next()
+ return d
+
+ def build_Tuple(self, o):
+ return tuple(self.build_List(o))
+
+ def build_Name(self, o):
+ if o.name == 'None':
+ return None
+ if o.name == 'True':
+ return True
+ if o.name == 'False':
+ return False
+
+ # An undefined Name
+ raise UnknownType('Undefined Name')
+
+ def build_Add(self, o):
+ real, imag = map(self.build_Const, o.getChildren())
+ try:
+ real = float(real)
+ except TypeError:
+ raise UnknownType('Add')
+ if not isinstance(imag, complex) or imag.real != 0.0:
+ raise UnknownType('Add')
+ return real+imag
+
+ def build_Getattr(self, o):
+ parent = self.build(o.expr)
+ return getattr(parent, o.attrname)
+
+ def build_UnarySub(self, o):
+ return -self.build_Const(o.getChildren()[0])
+
+ def build_UnaryAdd(self, o):
+ return self.build_Const(o.getChildren()[0])
+
+
+_builder = Builder()
+
+
+def unrepr(s):
+ if not s:
+ return s
+ return _builder.build(getObj(s))
+
+
+
+class ConfigObjError(SyntaxError):
+ """
+ This is the base class for all errors that ConfigObj raises.
+ It is a subclass of SyntaxError.
+ """
+ def __init__(self, message='', line_number=None, line=''):
+ self.line = line
+ self.line_number = line_number
+ SyntaxError.__init__(self, message)
+
+
+class NestingError(ConfigObjError):
+ """
+ This error indicates a level of nesting that doesn't match.
+ """
+
+
+class ParseError(ConfigObjError):
+ """
+ This error indicates that a line is badly written.
+ It is neither a valid ``key = value`` line,
+ nor a valid section marker line.
+ """
+
+
+class ReloadError(IOError):
+ """
+ A 'reload' operation failed.
+ This exception is a subclass of ``IOError``.
+ """
+ def __init__(self):
+ IOError.__init__(self, 'reload failed, filename is not set.')
+
+
+class DuplicateError(ConfigObjError):
+ """
+ The keyword or section specified already exists.
+ """
+
+
+class ConfigspecError(ConfigObjError):
+ """
+ An error occured whilst parsing a configspec.
+ """
+
+
+class InterpolationError(ConfigObjError):
+ """Base class for the two interpolation errors."""
+
+
+class InterpolationLoopError(InterpolationError):
+ """Maximum interpolation depth exceeded in string interpolation."""
+
+ def __init__(self, option):
+ InterpolationError.__init__(
+ self,
+ 'interpolation loop detected in value "%s".' % option)
+
+
+class RepeatSectionError(ConfigObjError):
+ """
+ This error indicates additional sections in a section with a
+ ``__many__`` (repeated) section.
+ """
+
+
+class MissingInterpolationOption(InterpolationError):
+ """A value specified for interpolation was missing."""
+ def __init__(self, option):
+ msg = 'missing option "%s" in interpolation.' % option
+ InterpolationError.__init__(self, msg)
+
+
+class UnreprError(ConfigObjError):
+ """An error parsing in unrepr mode."""
+
+
+
+class InterpolationEngine(object):
+ """
+ A helper class to help perform string interpolation.
+
+ This class is an abstract base class; its descendants perform
+ the actual work.
+ """
+
+ # compiled regexp to use in self.interpolate()
+ _KEYCRE = re.compile(r"%\(([^)]*)\)s")
+ _cookie = '%'
+
+ def __init__(self, section):
+ # the Section instance that "owns" this engine
+ self.section = section
+
+
+ def interpolate(self, key, value):
+ # short-cut
+ if not self._cookie in value:
+ return value
+
+ def recursive_interpolate(key, value, section, backtrail):
+ """The function that does the actual work.
+
+ ``value``: the string we're trying to interpolate.
+ ``section``: the section in which that string was found
+ ``backtrail``: a dict to keep track of where we've been,
+ to detect and prevent infinite recursion loops
+
+ This is similar to a depth-first-search algorithm.
+ """
+ # Have we been here already?
+ if (key, section.name) in backtrail:
+ # Yes - infinite loop detected
+ raise InterpolationLoopError(key)
+ # Place a marker on our backtrail so we won't come back here again
+ backtrail[(key, section.name)] = 1
+
+ # Now start the actual work
+ match = self._KEYCRE.search(value)
+ while match:
+ # The actual parsing of the match is implementation-dependent,
+ # so delegate to our helper function
+ k, v, s = self._parse_match(match)
+ if k is None:
+ # That's the signal that no further interpolation is needed
+ replacement = v
+ else:
+ # Further interpolation may be needed to obtain final value
+ replacement = recursive_interpolate(k, v, s, backtrail)
+ # Replace the matched string with its final value
+ start, end = match.span()
+ value = ''.join((value[:start], replacement, value[end:]))
+ new_search_start = start + len(replacement)
+ # Pick up the next interpolation key, if any, for next time
+ # through the while loop
+ match = self._KEYCRE.search(value, new_search_start)
+
+ # Now safe to come back here again; remove marker from backtrail
+ del backtrail[(key, section.name)]
+
+ return value
+
+ # Back in interpolate(), all we have to do is kick off the recursive
+ # function with appropriate starting values
+ value = recursive_interpolate(key, value, self.section, {})
+ return value
+
+
+ def _fetch(self, key):
+ """Helper function to fetch values from owning section.
+
+ Returns a 2-tuple: the value, and the section where it was found.
+ """
+ # switch off interpolation before we try and fetch anything !
+ save_interp = self.section.main.interpolation
+ self.section.main.interpolation = False
+
+ # Start at section that "owns" this InterpolationEngine
+ current_section = self.section
+ while True:
+ # try the current section first
+ val = current_section.get(key)
+ if val is not None:
+ break
+ # try "DEFAULT" next
+ val = current_section.get('DEFAULT', {}).get(key)
+ if val is not None:
+ break
+ # move up to parent and try again
+ # top-level's parent is itself
+ if current_section.parent is current_section:
+ # reached top level, time to give up
+ break
+ current_section = current_section.parent
+
+ # restore interpolation to previous value before returning
+ self.section.main.interpolation = save_interp
+ if val is None:
+ raise MissingInterpolationOption(key)
+ return val, current_section
+
+
+ def _parse_match(self, match):
+ """Implementation-dependent helper function.
+
+ Will be passed a match object corresponding to the interpolation
+ key we just found (e.g., "%(foo)s" or "$foo"). Should look up that
+ key in the appropriate config file section (using the ``_fetch()``
+ helper function) and return a 3-tuple: (key, value, section)
+
+ ``key`` is the name of the key we're looking for
+ ``value`` is the value found for that key
+ ``section`` is a reference to the section where it was found
+
+ ``key`` and ``section`` should be None if no further
+ interpolation should be performed on the resulting value
+ (e.g., if we interpolated "$$" and returned "$").
+ """
+ raise NotImplementedError()
+
+
+
+class ConfigParserInterpolation(InterpolationEngine):
+ """Behaves like ConfigParser."""
+ _cookie = '%'
+ _KEYCRE = re.compile(r"%\(([^)]*)\)s")
+
+ def _parse_match(self, match):
+ key = match.group(1)
+ value, section = self._fetch(key)
+ return key, value, section
+
+
+
+class TemplateInterpolation(InterpolationEngine):
+ """Behaves like string.Template."""
+ _cookie = '$'
+ _delimiter = '$'
+ _KEYCRE = re.compile(r"""
+ \$(?:
+ (?P<escaped>\$) | # Two $ signs
+ (?P<named>[_a-z][_a-z0-9]*) | # $name format
+ {(?P<braced>[^}]*)} # ${name} format
+ )
+ """, re.IGNORECASE | re.VERBOSE)
+
+ def _parse_match(self, match):
+ # Valid name (in or out of braces): fetch value from section
+ key = match.group('named') or match.group('braced')
+ if key is not None:
+ value, section = self._fetch(key)
+ return key, value, section
+ # Escaped delimiter (e.g., $$): return single delimiter
+ if match.group('escaped') is not None:
+ # Return None for key and section to indicate it's time to stop
+ return None, self._delimiter, None
+ # Anything else: ignore completely, just return it unchanged
+ return None, match.group(), None
+
+
+interpolation_engines = {
+ 'configparser': ConfigParserInterpolation,
+ 'template': TemplateInterpolation,
+}
+
+
+def __newobj__(cls, *args):
+ # Hack for pickle
+ return cls.__new__(cls, *args)
+
+class Section(dict):
+ """
+ A dictionary-like object that represents a section in a config file.
+
+ It does string interpolation if the 'interpolation' attribute
+ of the 'main' object is set to True.
+
+ Interpolation is tried first from this object, then from the 'DEFAULT'
+ section of this object, next from the parent and its 'DEFAULT' section,
+ and so on until the main object is reached.
+
+ A Section will behave like an ordered dictionary - following the
+ order of the ``scalars`` and ``sections`` attributes.
+ You can use this to change the order of members.
+
+ Iteration follows the order: scalars, then sections.
+ """
+
+
+ def __setstate__(self, state):
+ dict.update(self, state[0])
+ self.__dict__.update(state[1])
+
+ def __reduce__(self):
+ state = (dict(self), self.__dict__)
+ return (__newobj__, (self.__class__,), state)
+
+
+ def __init__(self, parent, depth, main, indict=None, name=None):
+ """
+ * parent is the section above
+ * depth is the depth level of this section
+ * main is the main ConfigObj
+ * indict is a dictionary to initialise the section with
+ """
+ if indict is None:
+ indict = {}
+ dict.__init__(self)
+ # used for nesting level *and* interpolation
+ self.parent = parent
+ # used for the interpolation attribute
+ self.main = main
+ # level of nesting depth of this Section
+ self.depth = depth
+ # purely for information
+ self.name = name
+ #
+ self._initialise()
+ # we do this explicitly so that __setitem__ is used properly
+ # (rather than just passing to ``dict.__init__``)
+ for entry, value in indict.iteritems():
+ self[entry] = value
+
+
+ def _initialise(self):
+ # the sequence of scalar values in this Section
+ self.scalars = []
+ # the sequence of sections in this Section
+ self.sections = []
+ # for comments :-)
+ self.comments = {}
+ self.inline_comments = {}
+ # the configspec
+ self.configspec = None
+ # for defaults
+ self.defaults = []
+ self.default_values = {}
+ self.extra_values = []
+ self._created = False
+
+
+ def _interpolate(self, key, value):
+ try:
+ # do we already have an interpolation engine?
+ engine = self._interpolation_engine
+ except AttributeError:
+ # not yet: first time running _interpolate(), so pick the engine
+ name = self.main.interpolation
+ if name == True: # note that "if name:" would be incorrect here
+ # backwards-compatibility: interpolation=True means use default
+ name = DEFAULT_INTERPOLATION
+ name = name.lower() # so that "Template", "template", etc. all work
+ class_ = interpolation_engines.get(name, None)
+ if class_ is None:
+ # invalid value for self.main.interpolation
+ self.main.interpolation = False
+ return value
+ else:
+ # save reference to engine so we don't have to do this again
+ engine = self._interpolation_engine = class_(self)
+ # let the engine do the actual work
+ return engine.interpolate(key, value)
+
+
+ def __getitem__(self, key):
+ """Fetch the item and do string interpolation."""
+ val = dict.__getitem__(self, key)
+ if self.main.interpolation:
+ if isinstance(val, basestring):
+ return self._interpolate(key, val)
+ if isinstance(val, list):
+ def _check(entry):
+ if isinstance(entry, basestring):
+ return self._interpolate(key, entry)
+ return entry
+ return [_check(entry) for entry in val]
+ return val
+
+
+ def __setitem__(self, key, value, unrepr=False):
+ """
+ Correctly set a value.
+
+ Making dictionary values Section instances.
+ (We have to special case 'Section' instances - which are also dicts)
+
+ Keys must be strings.
+ Values need only be strings (or lists of strings) if
+ ``main.stringify`` is set.
+
+ ``unrepr`` must be set when setting a value to a dictionary, without
+ creating a new sub-section.
+ """
+ if not isinstance(key, basestring):
+ raise ValueError('The key "%s" is not a string.' % key)
+
+ # add the comment
+ if key not in self.comments:
+ self.comments[key] = []
+ self.inline_comments[key] = ''
+ # remove the entry from defaults
+ if key in self.defaults:
+ self.defaults.remove(key)
+ #
+ if isinstance(value, Section):
+ if key not in self:
+ self.sections.append(key)
+ dict.__setitem__(self, key, value)
+ elif isinstance(value, dict) and not unrepr:
+ # First create the new depth level,
+ # then create the section
+ if key not in self:
+ self.sections.append(key)
+ new_depth = self.depth + 1
+ dict.__setitem__(
+ self,
+ key,
+ Section(
+ self,
+ new_depth,
+ self.main,
+ indict=value,
+ name=key))
+ else:
+ if key not in self:
+ self.scalars.append(key)
+ if not self.main.stringify:
+ if isinstance(value, basestring):
+ pass
+ elif isinstance(value, (list, tuple)):
+ for entry in value:
+ if not isinstance(entry, basestring):
+ raise TypeError('Value is not a string "%s".' % entry)
+ else:
+ raise TypeError('Value is not a string "%s".' % value)
+ dict.__setitem__(self, key, value)
+
+
+ def __delitem__(self, key):
+ """Remove items from the sequence when deleting."""
+ dict. __delitem__(self, key)
+ if key in self.scalars:
+ self.scalars.remove(key)
+ else:
+ self.sections.remove(key)
+ del self.comments[key]
+ del self.inline_comments[key]
+
+
+ def get(self, key, default=None):
+ """A version of ``get`` that doesn't bypass string interpolation."""
+ try:
+ return self[key]
+ except KeyError:
+ return default
+
+
+ def update(self, indict):
+ """
+ A version of update that uses our ``__setitem__``.
+ """
+ for entry in indict:
+ self[entry] = indict[entry]
+
+
+ def pop(self, key, *args):
+ """
+ 'D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+ If key is not found, d is returned if given, otherwise KeyError is raised'
+ """
+ val = dict.pop(self, key, *args)
+ if key in self.scalars:
+ del self.comments[key]
+ del self.inline_comments[key]
+ self.scalars.remove(key)
+ elif key in self.sections:
+ del self.comments[key]
+ del self.inline_comments[key]
+ self.sections.remove(key)
+ if self.main.interpolation and isinstance(val, basestring):
+ return self._interpolate(key, val)
+ return val
+
+
+ def popitem(self):
+ """Pops the first (key,val)"""
+ sequence = (self.scalars + self.sections)
+ if not sequence:
+ raise KeyError(": 'popitem(): dictionary is empty'")
+ key = sequence[0]
+ val = self[key]
+ del self[key]
+ return key, val
+
+
+ def clear(self):
+ """
+ A version of clear that also affects scalars/sections
+ Also clears comments and configspec.
+
+ Leaves other attributes alone :
+ depth/main/parent are not affected
+ """
+ dict.clear(self)
+ self.scalars = []
+ self.sections = []
+ self.comments = {}
+ self.inline_comments = {}
+ self.configspec = None
+ self.defaults = []
+ self.extra_values = []
+
+
+ def setdefault(self, key, default=None):
+ """A version of setdefault that sets sequence if appropriate."""
+ try:
+ return self[key]
+ except KeyError:
+ self[key] = default
+ return self[key]
+
+
+ def items(self):
+ """D.items() -> list of D's (key, value) pairs, as 2-tuples"""
+ return zip((self.scalars + self.sections), self.values())
+
+
+ def keys(self):
+ """D.keys() -> list of D's keys"""
+ return (self.scalars + self.sections)
+
+
+ def values(self):
+ """D.values() -> list of D's values"""
+ return [self[key] for key in (self.scalars + self.sections)]
+
+
+ def iteritems(self):
+ """D.iteritems() -> an iterator over the (key, value) items of D"""
+ return iter(self.items())
+
+
+ def iterkeys(self):
+ """D.iterkeys() -> an iterator over the keys of D"""
+ return iter((self.scalars + self.sections))
+
+ __iter__ = iterkeys
+
+
+ def itervalues(self):
+ """D.itervalues() -> an iterator over the values of D"""
+ return iter(self.values())
+
+
+ def __repr__(self):
+ """x.__repr__() <==> repr(x)"""
+ return '{%s}' % ', '.join([('%s: %s' % (repr(key), repr(self[key])))
+ for key in (self.scalars + self.sections)])
+
+ __str__ = __repr__
+ __str__.__doc__ = "x.__str__() <==> str(x)"
+
+
+ # Extra methods - not in a normal dictionary
+
+ def dict(self):
+ """
+ Return a deepcopy of self as a dictionary.
+
+ All members that are ``Section`` instances are recursively turned to
+ ordinary dictionaries - by calling their ``dict`` method.
+
+ >>> n = a.dict()
+ >>> n == a
+ 1
+ >>> n is a
+ 0
+ """
+ newdict = {}
+ for entry in self:
+ this_entry = self[entry]
+ if isinstance(this_entry, Section):
+ this_entry = this_entry.dict()
+ elif isinstance(this_entry, list):
+ # create a copy rather than a reference
+ this_entry = list(this_entry)
+ elif isinstance(this_entry, tuple):
+ # create a copy rather than a reference
+ this_entry = tuple(this_entry)
+ newdict[entry] = this_entry
+ return newdict
+
+
+ def merge(self, indict):
+ """
+ A recursive update - useful for merging config files.
+
+ >>> a = '''[section1]
+ ... option1 = True
+ ... [[subsection]]
+ ... more_options = False
+ ... # end of file'''.splitlines()
+ >>> b = '''# File is user.ini
+ ... [section1]
+ ... option1 = False
+ ... # end of file'''.splitlines()
+ >>> c1 = ConfigObj(b)
+ >>> c2 = ConfigObj(a)
+ >>> c2.merge(c1)
+ >>> c2
+ ConfigObj({'section1': {'option1': 'False', 'subsection': {'more_options': 'False'}}})
+ """
+ for key, val in indict.items():
+ if (key in self and isinstance(self[key], dict) and
+ isinstance(val, dict)):
+ self[key].merge(val)
+ else:
+ self[key] = val
+
+
+ def rename(self, oldkey, newkey):
+ """
+ Change a keyname to another, without changing position in sequence.
+
+ Implemented so that transformations can be made on keys,
+ as well as on values. (used by encode and decode)
+
+ Also renames comments.
+ """
+ if oldkey in self.scalars:
+ the_list = self.scalars
+ elif oldkey in self.sections:
+ the_list = self.sections
+ else:
+ raise KeyError('Key "%s" not found.' % oldkey)
+ pos = the_list.index(oldkey)
+ #
+ val = self[oldkey]
+ dict.__delitem__(self, oldkey)
+ dict.__setitem__(self, newkey, val)
+ the_list.remove(oldkey)
+ the_list.insert(pos, newkey)
+ comm = self.comments[oldkey]
+ inline_comment = self.inline_comments[oldkey]
+ del self.comments[oldkey]
+ del self.inline_comments[oldkey]
+ self.comments[newkey] = comm
+ self.inline_comments[newkey] = inline_comment
+
+
+ def walk(self, function, raise_errors=True,
+ call_on_sections=False, **keywargs):
+ """
+ Walk every member and call a function on the keyword and value.
+
+ Return a dictionary of the return values
+
+ If the function raises an exception, raise the errror
+ unless ``raise_errors=False``, in which case set the return value to
+ ``False``.
+
+ Any unrecognised keyword arguments you pass to walk, will be pased on
+ to the function you pass in.
+
+ Note: if ``call_on_sections`` is ``True`` then - on encountering a
+ subsection, *first* the function is called for the *whole* subsection,
+ and then recurses into it's members. This means your function must be
+ able to handle strings, dictionaries and lists. This allows you
+ to change the key of subsections as well as for ordinary members. The
+ return value when called on the whole subsection has to be discarded.
+
+ See the encode and decode methods for examples, including functions.
+
+ .. admonition:: caution
+
+ You can use ``walk`` to transform the names of members of a section
+ but you mustn't add or delete members.
+
+ >>> config = '''[XXXXsection]
+ ... XXXXkey = XXXXvalue'''.splitlines()
+ >>> cfg = ConfigObj(config)
+ >>> cfg
+ ConfigObj({'XXXXsection': {'XXXXkey': 'XXXXvalue'}})
+ >>> def transform(section, key):
+ ... val = section[key]
+ ... newkey = key.replace('XXXX', 'CLIENT1')
+ ... section.rename(key, newkey)
+ ... if isinstance(val, (tuple, list, dict)):
+ ... pass
+ ... else:
+ ... val = val.replace('XXXX', 'CLIENT1')
+ ... section[newkey] = val
+ >>> cfg.walk(transform, call_on_sections=True)
+ {'CLIENT1section': {'CLIENT1key': None}}
+ >>> cfg
+ ConfigObj({'CLIENT1section': {'CLIENT1key': 'CLIENT1value'}})
+ """
+ out = {}
+ # scalars first
+ for i in range(len(self.scalars)):
+ entry = self.scalars[i]
+ try:
+ val = function(self, entry, **keywargs)
+ # bound again in case name has changed
+ entry = self.scalars[i]
+ out[entry] = val
+ except Exception:
+ if raise_errors:
+ raise
+ else:
+ entry = self.scalars[i]
+ out[entry] = False
+ # then sections
+ for i in range(len(self.sections)):
+ entry = self.sections[i]
+ if call_on_sections:
+ try:
+ function(self, entry, **keywargs)
+ except Exception:
+ if raise_errors:
+ raise
+ else:
+ entry = self.sections[i]
+ out[entry] = False
+ # bound again in case name has changed
+ entry = self.sections[i]
+ # previous result is discarded
+ out[entry] = self[entry].walk(
+ function,
+ raise_errors=raise_errors,
+ call_on_sections=call_on_sections,
+ **keywargs)
+ return out
+
+
+ def as_bool(self, key):
+ """
+ Accepts a key as input. The corresponding value must be a string or
+ the objects (``True`` or 1) or (``False`` or 0). We allow 0 and 1 to
+ retain compatibility with Python 2.2.
+
+ If the string is one of ``True``, ``On``, ``Yes``, or ``1`` it returns
+ ``True``.
+
+ If the string is one of ``False``, ``Off``, ``No``, or ``0`` it returns
+ ``False``.
+
+ ``as_bool`` is not case sensitive.
+
+ Any other input will raise a ``ValueError``.
+
+ >>> a = ConfigObj()
+ >>> a['a'] = 'fish'
+ >>> a.as_bool('a')
+ Traceback (most recent call last):
+ ValueError: Value "fish" is neither True nor False
+ >>> a['b'] = 'True'
+ >>> a.as_bool('b')
+ 1
+ >>> a['b'] = 'off'
+ >>> a.as_bool('b')
+ 0
+ """
+ val = self[key]
+ if val == True:
+ return True
+ elif val == False:
+ return False
+ else:
+ try:
+ if not isinstance(val, basestring):
+ # TODO: Why do we raise a KeyError here?
+ raise KeyError()
+ else:
+ return self.main._bools[val.lower()]
+ except KeyError:
+ raise ValueError('Value "%s" is neither True nor False' % val)
+
+
+ def as_int(self, key):
+ """
+ A convenience method which coerces the specified value to an integer.
+
+ If the value is an invalid literal for ``int``, a ``ValueError`` will
+ be raised.
+
+ >>> a = ConfigObj()
+ >>> a['a'] = 'fish'
+ >>> a.as_int('a')
+ Traceback (most recent call last):
+ ValueError: invalid literal for int() with base 10: 'fish'
+ >>> a['b'] = '1'
+ >>> a.as_int('b')
+ 1
+ >>> a['b'] = '3.2'
+ >>> a.as_int('b')
+ Traceback (most recent call last):
+ ValueError: invalid literal for int() with base 10: '3.2'
+ """
+ return int(self[key])
+
+
+ def as_float(self, key):
+ """
+ A convenience method which coerces the specified value to a float.
+
+ If the value is an invalid literal for ``float``, a ``ValueError`` will
+ be raised.
+
+ >>> a = ConfigObj()
+ >>> a['a'] = 'fish'
+ >>> a.as_float('a')
+ Traceback (most recent call last):
+ ValueError: invalid literal for float(): fish
+ >>> a['b'] = '1'
+ >>> a.as_float('b')
+ 1.0
+ >>> a['b'] = '3.2'
+ >>> a.as_float('b')
+ 3.2000000000000002
+ """
+ return float(self[key])
+
+
+ def as_list(self, key):
+ """
+ A convenience method which fetches the specified value, guaranteeing
+ that it is a list.
+
+ >>> a = ConfigObj()
+ >>> a['a'] = 1
+ >>> a.as_list('a')
+ [1]
+ >>> a['a'] = (1,)
+ >>> a.as_list('a')
+ [1]
+ >>> a['a'] = [1]
+ >>> a.as_list('a')
+ [1]
+ """
+ result = self[key]
+ if isinstance(result, (tuple, list)):
+ return list(result)
+ return [result]
+
+
+ def restore_default(self, key):
+ """
+ Restore (and return) default value for the specified key.
+
+ This method will only work for a ConfigObj that was created
+ with a configspec and has been validated.
+
+ If there is no default value for this key, ``KeyError`` is raised.
+ """
+ default = self.default_values[key]
+ dict.__setitem__(self, key, default)
+ if key not in self.defaults:
+ self.defaults.append(key)
+ return default
+
+
+ def restore_defaults(self):
+ """
+ Recursively restore default values to all members
+ that have them.
+
+ This method will only work for a ConfigObj that was created
+ with a configspec and has been validated.
+
+ It doesn't delete or modify entries without default values.
+ """
+ for key in self.default_values:
+ self.restore_default(key)
+
+ for section in self.sections:
+ self[section].restore_defaults()
+
+
+class ConfigObj(Section):
+ """An object to read, create, and write config files."""
+
+ _keyword = re.compile(r'''^ # line start
+ (\s*) # indentation
+ ( # keyword
+ (?:".*?")| # double quotes
+ (?:'.*?')| # single quotes
+ (?:[^'"=].*?) # no quotes
+ )
+ \s*=\s* # divider
+ (.*) # value (including list values and comments)
+ $ # line end
+ ''',
+ re.VERBOSE)
+
+ _sectionmarker = re.compile(r'''^
+ (\s*) # 1: indentation
+ ((?:\[\s*)+) # 2: section marker open
+ ( # 3: section name open
+ (?:"\s*\S.*?\s*")| # at least one non-space with double quotes
+ (?:'\s*\S.*?\s*')| # at least one non-space with single quotes
+ (?:[^'"\s].*?) # at least one non-space unquoted
+ ) # section name close
+ ((?:\s*\])+) # 4: section marker close
+ \s*(\#.*)? # 5: optional comment
+ $''',
+ re.VERBOSE)
+
+ # this regexp pulls list values out as a single string
+ # or single values and comments
+ # FIXME: this regex adds a '' to the end of comma terminated lists
+ # workaround in ``_handle_value``
+ _valueexp = re.compile(r'''^
+ (?:
+ (?:
+ (
+ (?:
+ (?:
+ (?:".*?")| # double quotes
+ (?:'.*?')| # single quotes
+ (?:[^'",\#][^,\#]*?) # unquoted
+ )
+ \s*,\s* # comma
+ )* # match all list items ending in a comma (if any)
+ )
+ (
+ (?:".*?")| # double quotes
+ (?:'.*?')| # single quotes
+ (?:[^'",\#\s][^,]*?)| # unquoted
+ (?:(?<!,)) # Empty value
+ )? # last item in a list - or string value
+ )|
+ (,) # alternatively a single comma - empty list
+ )
+ \s*(\#.*)? # optional comment
+ $''',
+ re.VERBOSE)
+
+ # use findall to get the members of a list value
+ _listvalueexp = re.compile(r'''
+ (
+ (?:".*?")| # double quotes
+ (?:'.*?')| # single quotes
+ (?:[^'",\#]?.*?) # unquoted
+ )
+ \s*,\s* # comma
+ ''',
+ re.VERBOSE)
+
+ # this regexp is used for the value
+ # when lists are switched off
+ _nolistvalue = re.compile(r'''^
+ (
+ (?:".*?")| # double quotes
+ (?:'.*?')| # single quotes
+ (?:[^'"\#].*?)| # unquoted
+ (?:) # Empty value
+ )
+ \s*(\#.*)? # optional comment
+ $''',
+ re.VERBOSE)
+
+ # regexes for finding triple quoted values on one line
+ _single_line_single = re.compile(r"^'''(.*?)'''\s*(#.*)?$")
+ _single_line_double = re.compile(r'^"""(.*?)"""\s*(#.*)?$')
+ _multi_line_single = re.compile(r"^(.*?)'''\s*(#.*)?$")
+ _multi_line_double = re.compile(r'^(.*?)"""\s*(#.*)?$')
+
+ _triple_quote = {
+ "'''": (_single_line_single, _multi_line_single),
+ '"""': (_single_line_double, _multi_line_double),
+ }
+
+ # Used by the ``istrue`` Section method
+ _bools = {
+ 'yes': True, 'no': False,
+ 'on': True, 'off': False,
+ '1': True, '0': False,
+ 'true': True, 'false': False,
+ }
+
+
+ def __init__(self, infile=None, options=None, configspec=None, encoding=None,
+ interpolation=True, raise_errors=False, list_values=True,
+ create_empty=False, file_error=False, stringify=True,
+ indent_type=None, default_encoding=None, unrepr=False,
+ write_empty_values=False, _inspec=False):
+ """
+ Parse a config file or create a config file object.
+
+ ``ConfigObj(infile=None, configspec=None, encoding=None,
+ interpolation=True, raise_errors=False, list_values=True,
+ create_empty=False, file_error=False, stringify=True,
+ indent_type=None, default_encoding=None, unrepr=False,
+ write_empty_values=False, _inspec=False)``
+ """
+ self._inspec = _inspec
+ # init the superclass
+ Section.__init__(self, self, 0, self)
+
+ infile = infile or []
+
+ _options = {'configspec': configspec,
+ 'encoding': encoding, 'interpolation': interpolation,
+ 'raise_errors': raise_errors, 'list_values': list_values,
+ 'create_empty': create_empty, 'file_error': file_error,
+ 'stringify': stringify, 'indent_type': indent_type,
+ 'default_encoding': default_encoding, 'unrepr': unrepr,
+ 'write_empty_values': write_empty_values}
+
+ if options is None:
+ options = _options
+ else:
+ import warnings
+ warnings.warn('Passing in an options dictionary to ConfigObj() is '
+ 'deprecated. Use **options instead.',
+ DeprecationWarning, stacklevel=2)
+
+ # TODO: check the values too.
+ for entry in options:
+ if entry not in OPTION_DEFAULTS:
+ raise TypeError('Unrecognised option "%s".' % entry)
+ for entry, value in OPTION_DEFAULTS.items():
+ if entry not in options:
+ options[entry] = value
+ keyword_value = _options[entry]
+ if value != keyword_value:
+ options[entry] = keyword_value
+
+ # XXXX this ignores an explicit list_values = True in combination
+ # with _inspec. The user should *never* do that anyway, but still...
+ if _inspec:
+ options['list_values'] = False
+
+ self._initialise(options)
+ configspec = options['configspec']
+ self._original_configspec = configspec
+ self._load(infile, configspec)
+
+
+ def _load(self, infile, configspec):
+ if isinstance(infile, basestring):
+ self.filename = infile
+ if os.path.isfile(infile):
+ h = open(infile, 'rb')
+ infile = h.read() or []
+ h.close()
+ elif self.file_error:
+ # raise an error if the file doesn't exist
+ raise IOError('Config file not found: "%s".' % self.filename)
+ else:
+ # file doesn't already exist
+ if self.create_empty:
+ # this is a good test that the filename specified
+ # isn't impossible - like on a non-existent device
+ h = open(infile, 'w')
+ h.write('')
+ h.close()
+ infile = []
+
+ elif isinstance(infile, (list, tuple)):
+ infile = list(infile)
+
+ elif isinstance(infile, dict):
+ # initialise self
+ # the Section class handles creating subsections
+ if isinstance(infile, ConfigObj):
+ # get a copy of our ConfigObj
+ def set_section(in_section, this_section):
+ for entry in in_section.scalars:
+ this_section[entry] = in_section[entry]
+ for section in in_section.sections:
+ this_section[section] = {}
+ set_section(in_section[section], this_section[section])
+ set_section(infile, self)
+
+ else:
+ for entry in infile:
+ self[entry] = infile[entry]
+ del self._errors
+
+ if configspec is not None:
+ self._handle_configspec(configspec)
+ else:
+ self.configspec = None
+ return
+
+ elif getattr(infile, 'read', MISSING) is not MISSING:
+ # This supports file like objects
+ infile = infile.read() or []
+ # needs splitting into lines - but needs doing *after* decoding
+ # in case it's not an 8 bit encoding
+ else:
+ raise TypeError('infile must be a filename, file like object, or list of lines.')
+
+ if infile:
+ # don't do it for the empty ConfigObj
+ infile = self._handle_bom(infile)
+ # infile is now *always* a list
+ #
+ # Set the newlines attribute (first line ending it finds)
+ # and strip trailing '\n' or '\r' from lines
+ for line in infile:
+ if (not line) or (line[-1] not in ('\r', '\n', '\r\n')):
+ continue
+ for end in ('\r\n', '\n', '\r'):
+ if line.endswith(end):
+ self.newlines = end
+ break
+ break
+
+ infile = [line.rstrip('\r\n') for line in infile]
+
+ self._parse(infile)
+ # if we had any errors, now is the time to raise them
+ if self._errors:
+ info = "at line %s." % self._errors[0].line_number
+ if len(self._errors) > 1:
+ msg = "Parsing failed with several errors.\nFirst error %s" % info
+ error = ConfigObjError(msg)
+ else:
+ error = self._errors[0]
+ # set the errors attribute; it's a list of tuples:
+ # (error_type, message, line_number)
+ error.errors = self._errors
+ # set the config attribute
+ error.config = self
+ raise error
+ # delete private attributes
+ del self._errors
+
+ if configspec is None:
+ self.configspec = None
+ else:
+ self._handle_configspec(configspec)
+
+
+ def _initialise(self, options=None):
+ if options is None:
+ options = OPTION_DEFAULTS
+
+ # initialise a few variables
+ self.filename = None
+ self._errors = []
+ self.raise_errors = options['raise_errors']
+ self.interpolation = options['interpolation']
+ self.list_values = options['list_values']
+ self.create_empty = options['create_empty']
+ self.file_error = options['file_error']
+ self.stringify = options['stringify']
+ self.indent_type = options['indent_type']
+ self.encoding = options['encoding']
+ self.default_encoding = options['default_encoding']
+ self.BOM = False
+ self.newlines = None
+ self.write_empty_values = options['write_empty_values']
+ self.unrepr = options['unrepr']
+
+ self.initial_comment = []
+ self.final_comment = []
+ self.configspec = None
+
+ if self._inspec:
+ self.list_values = False
+
+ # Clear section attributes as well
+ Section._initialise(self)
+
+
+ def __repr__(self):
+ return ('ConfigObj({%s})' %
+ ', '.join([('%s: %s' % (repr(key), repr(self[key])))
+ for key in (self.scalars + self.sections)]))
+
+
+ def _handle_bom(self, infile):
+ """
+ Handle any BOM, and decode if necessary.
+
+ If an encoding is specified, that *must* be used - but the BOM should
+ still be removed (and the BOM attribute set).
+
+ (If the encoding is wrongly specified, then a BOM for an alternative
+ encoding won't be discovered or removed.)
+
+ If an encoding is not specified, UTF8 or UTF16 BOM will be detected and
+ removed. The BOM attribute will be set. UTF16 will be decoded to
+ unicode.
+
+ NOTE: This method must not be called with an empty ``infile``.
+
+ Specifying the *wrong* encoding is likely to cause a
+ ``UnicodeDecodeError``.
+
+ ``infile`` must always be returned as a list of lines, but may be
+ passed in as a single string.
+ """
+ if ((self.encoding is not None) and
+ (self.encoding.lower() not in BOM_LIST)):
+ # No need to check for a BOM
+ # the encoding specified doesn't have one
+ # just decode
+ return self._decode(infile, self.encoding)
+
+ if isinstance(infile, (list, tuple)):
+ line = infile[0]
+ else:
+ line = infile
+ if self.encoding is not None:
+ # encoding explicitly supplied
+ # And it could have an associated BOM
+ # TODO: if encoding is just UTF16 - we ought to check for both
+ # TODO: big endian and little endian versions.
+ enc = BOM_LIST[self.encoding.lower()]
+ if enc == 'utf_16':
+ # For UTF16 we try big endian and little endian
+ for BOM, (encoding, final_encoding) in BOMS.items():
+ if not final_encoding:
+ # skip UTF8
+ continue
+ if infile.startswith(BOM):
+ ### BOM discovered
+ ##self.BOM = True
+ # Don't need to remove BOM
+ return self._decode(infile, encoding)
+
+ # If we get this far, will *probably* raise a DecodeError
+ # As it doesn't appear to start with a BOM
+ return self._decode(infile, self.encoding)
+
+ # Must be UTF8
+ BOM = BOM_SET[enc]
+ if not line.startswith(BOM):
+ return self._decode(infile, self.encoding)
+
+ newline = line[len(BOM):]
+
+ # BOM removed
+ if isinstance(infile, (list, tuple)):
+ infile[0] = newline
+ else:
+ infile = newline
+ self.BOM = True
+ return self._decode(infile, self.encoding)
+
+ # No encoding specified - so we need to check for UTF8/UTF16
+ for BOM, (encoding, final_encoding) in BOMS.items():
+ if not line.startswith(BOM):
+ continue
+ else:
+ # BOM discovered
+ self.encoding = final_encoding
+ if not final_encoding:
+ self.BOM = True
+ # UTF8
+ # remove BOM
+ newline = line[len(BOM):]
+ if isinstance(infile, (list, tuple)):
+ infile[0] = newline
+ else:
+ infile = newline
+ # UTF8 - don't decode
+ if isinstance(infile, basestring):
+ return infile.splitlines(True)
+ else:
+ return infile
+ # UTF16 - have to decode
+ return self._decode(infile, encoding)
+
+ # No BOM discovered and no encoding specified, just return
+ if isinstance(infile, basestring):
+ # infile read from a file will be a single string
+ return infile.splitlines(True)
+ return infile
+
+
+ def _a_to_u(self, aString):
+ """Decode ASCII strings to unicode if a self.encoding is specified."""
+ if self.encoding:
+ return aString.decode('ascii')
+ else:
+ return aString
+
+
+ def _decode(self, infile, encoding):
+ """
+ Decode infile to unicode. Using the specified encoding.
+
+ if is a string, it also needs converting to a list.
+ """
+ if isinstance(infile, basestring):
+ # can't be unicode
+ # NOTE: Could raise a ``UnicodeDecodeError``
+ return infile.decode(encoding).splitlines(True)
+ for i, line in enumerate(infile):
+ if not isinstance(line, unicode):
+ # NOTE: The isinstance test here handles mixed lists of unicode/string
+ # NOTE: But the decode will break on any non-string values
+ # NOTE: Or could raise a ``UnicodeDecodeError``
+ infile[i] = line.decode(encoding)
+ return infile
+
+
+ def _decode_element(self, line):
+ """Decode element to unicode if necessary."""
+ if not self.encoding:
+ return line
+ if isinstance(line, str) and self.default_encoding:
+ return line.decode(self.default_encoding)
+ return line
+
+
+ def _str(self, value):
+ """
+ Used by ``stringify`` within validate, to turn non-string values
+ into strings.
+ """
+ if not isinstance(value, basestring):
+ return str(value)
+ else:
+ return value
+
+
+ def _parse(self, infile):
+ """Actually parse the config file."""
+ temp_list_values = self.list_values
+ if self.unrepr:
+ self.list_values = False
+
+ comment_list = []
+ done_start = False
+ this_section = self
+ maxline = len(infile) - 1
+ cur_index = -1
+ reset_comment = False
+
+ while cur_index < maxline:
+ if reset_comment:
+ comment_list = []
+ cur_index += 1
+ line = infile[cur_index]
+ sline = line.strip()
+ # do we have anything on the line ?
+ if not sline or sline.startswith('#'):
+ reset_comment = False
+ comment_list.append(line)
+ continue
+
+ if not done_start:
+ # preserve initial comment
+ self.initial_comment = comment_list
+ comment_list = []
+ done_start = True
+
+ reset_comment = True
+ # first we check if it's a section marker
+ mat = self._sectionmarker.match(line)
+ if mat is not None:
+ # is a section line
+ (indent, sect_open, sect_name, sect_close, comment) = mat.groups()
+ if indent and (self.indent_type is None):
+ self.indent_type = indent
+ cur_depth = sect_open.count('[')
+ if cur_depth != sect_close.count(']'):
+ self._handle_error("Cannot compute the section depth at line %s.",
+ NestingError, infile, cur_index)
+ continue
+
+ if cur_depth < this_section.depth:
+ # the new section is dropping back to a previous level
+ try:
+ parent = self._match_depth(this_section,
+ cur_depth).parent
+ except SyntaxError:
+ self._handle_error("Cannot compute nesting level at line %s.",
+ NestingError, infile, cur_index)
+ continue
+ elif cur_depth == this_section.depth:
+ # the new section is a sibling of the current section
+ parent = this_section.parent
+ elif cur_depth == this_section.depth + 1:
+ # the new section is a child the current section
+ parent = this_section
+ else:
+ self._handle_error("Section too nested at line %s.",
+ NestingError, infile, cur_index)
+
+ sect_name = self._unquote(sect_name)
+ if sect_name in parent:
+ self._handle_error('Duplicate section name at line %s.',
+ DuplicateError, infile, cur_index)
+ continue
+
+ # create the new section
+ this_section = Section(
+ parent,
+ cur_depth,
+ self,
+ name=sect_name)
+ parent[sect_name] = this_section
+ parent.inline_comments[sect_name] = comment
+ parent.comments[sect_name] = comment_list
+ continue
+ #
+ # it's not a section marker,
+ # so it should be a valid ``key = value`` line
+ mat = self._keyword.match(line)
+ if mat is None:
+ # it neither matched as a keyword
+ # or a section marker
+ self._handle_error(
+ 'Invalid line at line "%s".',
+ ParseError, infile, cur_index)
+ else:
+ # is a keyword value
+ # value will include any inline comment
+ (indent, key, value) = mat.groups()
+ if indent and (self.indent_type is None):
+ self.indent_type = indent
+ # check for a multiline value
+ if value[:3] in ['"""', "'''"]:
+ try:
+ value, comment, cur_index = self._multiline(
+ value, infile, cur_index, maxline)
+ except SyntaxError:
+ self._handle_error(
+ 'Parse error in value at line %s.',
+ ParseError, infile, cur_index)
+ continue
+ else:
+ if self.unrepr:
+ comment = ''
+ try:
+ value = unrepr(value)
+ except Exception, e:
+ if type(e) == UnknownType:
+ msg = 'Unknown name or type in value at line %s.'
+ else:
+ msg = 'Parse error in value at line %s.'
+ self._handle_error(msg, UnreprError, infile,
+ cur_index)
+ continue
+ else:
+ if self.unrepr:
+ comment = ''
+ try:
+ value = unrepr(value)
+ except Exception, e:
+ if isinstance(e, UnknownType):
+ msg = 'Unknown name or type in value at line %s.'
+ else:
+ msg = 'Parse error in value at line %s.'
+ self._handle_error(msg, UnreprError, infile,
+ cur_index)
+ continue
+ else:
+ # extract comment and lists
+ try:
+ (value, comment) = self._handle_value(value)
+ except SyntaxError:
+ self._handle_error(
+ 'Parse error in value at line %s.',
+ ParseError, infile, cur_index)
+ continue
+ #
+ key = self._unquote(key)
+ if key in this_section:
+ self._handle_error(
+ 'Duplicate keyword name at line %s.',
+ DuplicateError, infile, cur_index)
+ continue
+ # add the key.
+ # we set unrepr because if we have got this far we will never
+ # be creating a new section
+ this_section.__setitem__(key, value, unrepr=True)
+ this_section.inline_comments[key] = comment
+ this_section.comments[key] = comment_list
+ continue
+ #
+ if self.indent_type is None:
+ # no indentation used, set the type accordingly
+ self.indent_type = ''
+
+ # preserve the final comment
+ if not self and not self.initial_comment:
+ self.initial_comment = comment_list
+ elif not reset_comment:
+ self.final_comment = comment_list
+ self.list_values = temp_list_values
+
+
+ def _match_depth(self, sect, depth):
+ """
+ Given a section and a depth level, walk back through the sections
+ parents to see if the depth level matches a previous section.
+
+ Return a reference to the right section,
+ or raise a SyntaxError.
+ """
+ while depth < sect.depth:
+ if sect is sect.parent:
+ # we've reached the top level already
+ raise SyntaxError()
+ sect = sect.parent
+ if sect.depth == depth:
+ return sect
+ # shouldn't get here
+ raise SyntaxError()
+
+
+ def _handle_error(self, text, ErrorClass, infile, cur_index):
+ """
+ Handle an error according to the error settings.
+
+ Either raise the error or store it.
+ The error will have occured at ``cur_index``
+ """
+ line = infile[cur_index]
+ cur_index += 1
+ message = text % cur_index
+ error = ErrorClass(message, cur_index, line)
+ if self.raise_errors:
+ # raise the error - parsing stops here
+ raise error
+ # store the error
+ # reraise when parsing has finished
+ self._errors.append(error)
+
+
+ def _unquote(self, value):
+ """Return an unquoted version of a value"""
+ if not value:
+ # should only happen during parsing of lists
+ raise SyntaxError
+ if (value[0] == value[-1]) and (value[0] in ('"', "'")):
+ value = value[1:-1]
+ return value
+
+
+ def _quote(self, value, multiline=True):
+ """
+ Return a safely quoted version of a value.
+
+ Raise a ConfigObjError if the value cannot be safely quoted.
+ If multiline is ``True`` (default) then use triple quotes
+ if necessary.
+
+ * Don't quote values that don't need it.
+ * Recursively quote members of a list and return a comma joined list.
+ * Multiline is ``False`` for lists.
+ * Obey list syntax for empty and single member lists.
+
+ If ``list_values=False`` then the value is only quoted if it contains
+ a ``\\n`` (is multiline) or '#'.
+
+ If ``write_empty_values`` is set, and the value is an empty string, it
+ won't be quoted.
+ """
+ if multiline and self.write_empty_values and value == '':
+ # Only if multiline is set, so that it is used for values not
+ # keys, and not values that are part of a list
+ return ''
+
+ if multiline and isinstance(value, (list, tuple)):
+ if not value:
+ return ','
+ elif len(value) == 1:
+ return self._quote(value[0], multiline=False) + ','
+ return ', '.join([self._quote(val, multiline=False)
+ for val in value])
+ if not isinstance(value, basestring):
+ if self.stringify:
+ value = str(value)
+ else:
+ raise TypeError('Value "%s" is not a string.' % value)
+
+ if not value:
+ return '""'
+
+ no_lists_no_quotes = not self.list_values and '\n' not in value and '#' not in value
+ need_triple = multiline and ((("'" in value) and ('"' in value)) or ('\n' in value ))
+ hash_triple_quote = multiline and not need_triple and ("'" in value) and ('"' in value) and ('#' in value)
+ check_for_single = (no_lists_no_quotes or not need_triple) and not hash_triple_quote
+
+ if check_for_single:
+ if not self.list_values:
+ # we don't quote if ``list_values=False``
+ quot = noquot
+ # for normal values either single or double quotes will do
+ elif '\n' in value:
+ # will only happen if multiline is off - e.g. '\n' in key
+ raise ConfigObjError('Value "%s" cannot be safely quoted.' % value)
+ elif ((value[0] not in wspace_plus) and
+ (value[-1] not in wspace_plus) and
+ (',' not in value)):
+ quot = noquot
+ else:
+ quot = self._get_single_quote(value)
+ else:
+ # if value has '\n' or "'" *and* '"', it will need triple quotes
+ quot = self._get_triple_quote(value)
+
+ if quot == noquot and '#' in value and self.list_values:
+ quot = self._get_single_quote(value)
+
+ return quot % value
+
+
+ def _get_single_quote(self, value):
+ if ("'" in value) and ('"' in value):
+ raise ConfigObjError('Value "%s" cannot be safely quoted.' % value)
+ elif '"' in value:
+ quot = squot
+ else:
+ quot = dquot
+ return quot
+
+
+ def _get_triple_quote(self, value):
+ if (value.find('"""') != -1) and (value.find("'''") != -1):
+ raise ConfigObjError('Value "%s" cannot be safely quoted.' % value)
+ if value.find('"""') == -1:
+ quot = tdquot
+ else:
+ quot = tsquot
+ return quot
+
+
+ def _handle_value(self, value):
+ """
+ Given a value string, unquote, remove comment,
+ handle lists. (including empty and single member lists)
+ """
+ if self._inspec:
+ # Parsing a configspec so don't handle comments
+ return (value, '')
+ # do we look for lists in values ?
+ if not self.list_values:
+ mat = self._nolistvalue.match(value)
+ if mat is None:
+ raise SyntaxError()
+ # NOTE: we don't unquote here
+ return mat.groups()
+ #
+ mat = self._valueexp.match(value)
+ if mat is None:
+ # the value is badly constructed, probably badly quoted,
+ # or an invalid list
+ raise SyntaxError()
+ (list_values, single, empty_list, comment) = mat.groups()
+ if (list_values == '') and (single is None):
+ # change this if you want to accept empty values
+ raise SyntaxError()
+ # NOTE: note there is no error handling from here if the regex
+ # is wrong: then incorrect values will slip through
+ if empty_list is not None:
+ # the single comma - meaning an empty list
+ return ([], comment)
+ if single is not None:
+ # handle empty values
+ if list_values and not single:
+ # FIXME: the '' is a workaround because our regex now matches
+ # '' at the end of a list if it has a trailing comma
+ single = None
+ else:
+ single = single or '""'
+ single = self._unquote(single)
+ if list_values == '':
+ # not a list value
+ return (single, comment)
+ the_list = self._listvalueexp.findall(list_values)
+ the_list = [self._unquote(val) for val in the_list]
+ if single is not None:
+ the_list += [single]
+ return (the_list, comment)
+
+
+ def _multiline(self, value, infile, cur_index, maxline):
+ """Extract the value, where we are in a multiline situation."""
+ quot = value[:3]
+ newvalue = value[3:]
+ single_line = self._triple_quote[quot][0]
+ multi_line = self._triple_quote[quot][1]
+ mat = single_line.match(value)
+ if mat is not None:
+ retval = list(mat.groups())
+ retval.append(cur_index)
+ return retval
+ elif newvalue.find(quot) != -1:
+ # somehow the triple quote is missing
+ raise SyntaxError()
+ #
+ while cur_index < maxline:
+ cur_index += 1
+ newvalue += '\n'
+ line = infile[cur_index]
+ if line.find(quot) == -1:
+ newvalue += line
+ else:
+ # end of multiline, process it
+ break
+ else:
+ # we've got to the end of the config, oops...
+ raise SyntaxError()
+ mat = multi_line.match(line)
+ if mat is None:
+ # a badly formed line
+ raise SyntaxError()
+ (value, comment) = mat.groups()
+ return (newvalue + value, comment, cur_index)
+
+
+ def _handle_configspec(self, configspec):
+ """Parse the configspec."""
+ # FIXME: Should we check that the configspec was created with the
+ # correct settings ? (i.e. ``list_values=False``)
+ if not isinstance(configspec, ConfigObj):
+ try:
+ configspec = ConfigObj(configspec,
+ raise_errors=True,
+ file_error=True,
+ _inspec=True)
+ except ConfigObjError, e:
+ # FIXME: Should these errors have a reference
+ # to the already parsed ConfigObj ?
+ raise ConfigspecError('Parsing configspec failed: %s' % e)
+ except IOError, e:
+ raise IOError('Reading configspec failed: %s' % e)
+
+ self.configspec = configspec
+
+
+
+ def _set_configspec(self, section, copy):
+ """
+ Called by validate. Handles setting the configspec on subsections
+ including sections to be validated by __many__
+ """
+ configspec = section.configspec
+ many = configspec.get('__many__')
+ if isinstance(many, dict):
+ for entry in section.sections:
+ if entry not in configspec:
+ section[entry].configspec = many
+
+ for entry in configspec.sections:
+ if entry == '__many__':
+ continue
+ if entry not in section:
+ section[entry] = {}
+ section[entry]._created = True
+ if copy:
+ # copy comments
+ section.comments[entry] = configspec.comments.get(entry, [])
+ section.inline_comments[entry] = configspec.inline_comments.get(entry, '')
+
+ # Could be a scalar when we expect a section
+ if isinstance(section[entry], Section):
+ section[entry].configspec = configspec[entry]
+
+
+ def _write_line(self, indent_string, entry, this_entry, comment):
+ """Write an individual line, for the write method"""
+ # NOTE: the calls to self._quote here handles non-StringType values.
+ if not self.unrepr:
+ val = self._decode_element(self._quote(this_entry))
+ else:
+ val = repr(this_entry)
+ return '%s%s%s%s%s' % (indent_string,
+ self._decode_element(self._quote(entry, multiline=False)),
+ self._a_to_u(' = '),
+ val,
+ self._decode_element(comment))
+
+
+ def _write_marker(self, indent_string, depth, entry, comment):
+ """Write a section marker line"""
+ return '%s%s%s%s%s' % (indent_string,
+ self._a_to_u('[' * depth),
+ self._quote(self._decode_element(entry), multiline=False),
+ self._a_to_u(']' * depth),
+ self._decode_element(comment))
+
+
+ def _handle_comment(self, comment):
+ """Deal with a comment."""
+ if not comment:
+ return ''
+ start = self.indent_type
+ if not comment.startswith('#'):
+ start += self._a_to_u(' # ')
+ return (start + comment)
+
+
+ # Public methods
+
+ def write(self, outfile=None, section=None):
+ """
+ Write the current ConfigObj as a file
+
+ tekNico: FIXME: use StringIO instead of real files
+
+ >>> filename = a.filename
+ >>> a.filename = 'test.ini'
+ >>> a.write()
+ >>> a.filename = filename
+ >>> a == ConfigObj('test.ini', raise_errors=True)
+ 1
+ """
+ if self.indent_type is None:
+ # this can be true if initialised from a dictionary
+ self.indent_type = DEFAULT_INDENT_TYPE
+
+ out = []
+ cs = self._a_to_u('#')
+ csp = self._a_to_u('# ')
+ if section is None:
+ int_val = self.interpolation
+ self.interpolation = False
+ section = self
+ for line in self.initial_comment:
+ line = self._decode_element(line)
+ stripped_line = line.strip()
+ if stripped_line and not stripped_line.startswith(cs):
+ line = csp + line
+ out.append(line)
+
+ indent_string = self.indent_type * section.depth
+ for entry in (section.scalars + section.sections):
+ if entry in section.defaults:
+ # don't write out default values
+ continue
+ for comment_line in section.comments[entry]:
+ comment_line = self._decode_element(comment_line.lstrip())
+ if comment_line and not comment_line.startswith(cs):
+ comment_line = csp + comment_line
+ out.append(indent_string + comment_line)
+ this_entry = section[entry]
+ comment = self._handle_comment(section.inline_comments[entry])
+
+ if isinstance(this_entry, dict):
+ # a section
+ out.append(self._write_marker(
+ indent_string,
+ this_entry.depth,
+ entry,
+ comment))
+ out.extend(self.write(section=this_entry))
+ else:
+ out.append(self._write_line(
+ indent_string,
+ entry,
+ this_entry,
+ comment))
+
+ if section is self:
+ for line in self.final_comment:
+ line = self._decode_element(line)
+ stripped_line = line.strip()
+ if stripped_line and not stripped_line.startswith(cs):
+ line = csp + line
+ out.append(line)
+ self.interpolation = int_val
+
+ if section is not self:
+ return out
+
+ if (self.filename is None) and (outfile is None):
+ # output a list of lines
+ # might need to encode
+ # NOTE: This will *screw* UTF16, each line will start with the BOM
+ if self.encoding:
+ out = [l.encode(self.encoding) for l in out]
+ if (self.BOM and ((self.encoding is None) or
+ (BOM_LIST.get(self.encoding.lower()) == 'utf_8'))):
+ # Add the UTF8 BOM
+ if not out:
+ out.append('')
+ out[0] = BOM_UTF8 + out[0]
+ return out
+
+ # Turn the list to a string, joined with correct newlines
+ newline = self.newlines or os.linesep
+ output = self._a_to_u(newline).join(out)
+ if self.encoding:
+ output = output.encode(self.encoding)
+ if self.BOM and ((self.encoding is None) or match_utf8(self.encoding)):
+ # Add the UTF8 BOM
+ output = BOM_UTF8 + output
+
+ if not output.endswith(newline):
+ output += newline
+ if outfile is not None:
+ outfile.write(output)
+ else:
+ h = open(self.filename, 'wb')
+ h.write(output)
+ h.close()
+
+
+ def validate(self, validator, preserve_errors=False, copy=False,
+ section=None):
+ """
+ Test the ConfigObj against a configspec.
+
+ It uses the ``validator`` object from *validate.py*.
+
+ To run ``validate`` on the current ConfigObj, call: ::
+
+ test = config.validate(validator)
+
+ (Normally having previously passed in the configspec when the ConfigObj
+ was created - you can dynamically assign a dictionary of checks to the
+ ``configspec`` attribute of a section though).
+
+ It returns ``True`` if everything passes, or a dictionary of
+ pass/fails (True/False). If every member of a subsection passes, it
+ will just have the value ``True``. (It also returns ``False`` if all
+ members fail).
+
+ In addition, it converts the values from strings to their native
+ types if their checks pass (and ``stringify`` is set).
+
+ If ``preserve_errors`` is ``True`` (``False`` is default) then instead
+ of a marking a fail with a ``False``, it will preserve the actual
+ exception object. This can contain info about the reason for failure.
+ For example the ``VdtValueTooSmallError`` indicates that the value
+ supplied was too small. If a value (or section) is missing it will
+ still be marked as ``False``.
+
+ You must have the validate module to use ``preserve_errors=True``.
+
+ You can then use the ``flatten_errors`` function to turn your nested
+ results dictionary into a flattened list of failures - useful for
+ displaying meaningful error messages.
+ """
+ if section is None:
+ if self.configspec is None:
+ raise ValueError('No configspec supplied.')
+ if preserve_errors:
+ # We do this once to remove a top level dependency on the validate module
+ # Which makes importing configobj faster
+ from validate import VdtMissingValue
+ self._vdtMissingValue = VdtMissingValue
+
+ section = self
+
+ if copy:
+ section.initial_comment = section.configspec.initial_comment
+ section.final_comment = section.configspec.final_comment
+ section.encoding = section.configspec.encoding
+ section.BOM = section.configspec.BOM
+ section.newlines = section.configspec.newlines
+ section.indent_type = section.configspec.indent_type
+
+ #
+ # section.default_values.clear() #??
+ configspec = section.configspec
+ self._set_configspec(section, copy)
+
+
+ def validate_entry(entry, spec, val, missing, ret_true, ret_false):
+ section.default_values.pop(entry, None)
+
+ try:
+ section.default_values[entry] = validator.get_default_value(configspec[entry])
+ except (KeyError, AttributeError, validator.baseErrorClass):
+ # No default, bad default or validator has no 'get_default_value'
+ # (e.g. SimpleVal)
+ pass
+
+ try:
+ check = validator.check(spec,
+ val,
+ missing=missing
+ )
+ except validator.baseErrorClass, e:
+ if not preserve_errors or isinstance(e, self._vdtMissingValue):
+ out[entry] = False
+ else:
+ # preserve the error
+ out[entry] = e
+ ret_false = False
+ ret_true = False
+ else:
+ ret_false = False
+ out[entry] = True
+ if self.stringify or missing:
+ # if we are doing type conversion
+ # or the value is a supplied default
+ if not self.stringify:
+ if isinstance(check, (list, tuple)):
+ # preserve lists
+ check = [self._str(item) for item in check]
+ elif missing and check is None:
+ # convert the None from a default to a ''
+ check = ''
+ else:
+ check = self._str(check)
+ if (check != val) or missing:
+ section[entry] = check
+ if not copy and missing and entry not in section.defaults:
+ section.defaults.append(entry)
+ return ret_true, ret_false
+
+ #
+ out = {}
+ ret_true = True
+ ret_false = True
+
+ unvalidated = [k for k in section.scalars if k not in configspec]
+ incorrect_sections = [k for k in configspec.sections if k in section.scalars]
+ incorrect_scalars = [k for k in configspec.scalars if k in section.sections]
+
+ for entry in configspec.scalars:
+ if entry in ('__many__', '___many___'):
+ # reserved names
+ continue
+ if (not entry in section.scalars) or (entry in section.defaults):
+ # missing entries
+ # or entries from defaults
+ missing = True
+ val = None
+ if copy and entry not in section.scalars:
+ # copy comments
+ section.comments[entry] = (
+ configspec.comments.get(entry, []))
+ section.inline_comments[entry] = (
+ configspec.inline_comments.get(entry, ''))
+ #
+ else:
+ missing = False
+ val = section[entry]
+
+ ret_true, ret_false = validate_entry(entry, configspec[entry], val,
+ missing, ret_true, ret_false)
+
+ many = None
+ if '__many__' in configspec.scalars:
+ many = configspec['__many__']
+ elif '___many___' in configspec.scalars:
+ many = configspec['___many___']
+
+ if many is not None:
+ for entry in unvalidated:
+ val = section[entry]
+ ret_true, ret_false = validate_entry(entry, many, val, False,
+ ret_true, ret_false)
+ unvalidated = []
+
+ for entry in incorrect_scalars:
+ ret_true = False
+ if not preserve_errors:
+ out[entry] = False
+ else:
+ ret_false = False
+ msg = 'Value %r was provided as a section' % entry
+ out[entry] = validator.baseErrorClass(msg)
+ for entry in incorrect_sections:
+ ret_true = False
+ if not preserve_errors:
+ out[entry] = False
+ else:
+ ret_false = False
+ msg = 'Section %r was provided as a single value' % entry
+ out[entry] = validator.baseErrorClass(msg)
+
+ # Missing sections will have been created as empty ones when the
+ # configspec was read.
+ for entry in section.sections:
+ # FIXME: this means DEFAULT is not copied in copy mode
+ if section is self and entry == 'DEFAULT':
+ continue
+ if section[entry].configspec is None:
+ unvalidated.append(entry)
+ continue
+ if copy:
+ section.comments[entry] = configspec.comments.get(entry, [])
+ section.inline_comments[entry] = configspec.inline_comments.get(entry, '')
+ check = self.validate(validator, preserve_errors=preserve_errors, copy=copy, section=section[entry])
+ out[entry] = check
+ if check == False:
+ ret_true = False
+ elif check == True:
+ ret_false = False
+ else:
+ ret_true = False
+
+ section.extra_values = unvalidated
+ if preserve_errors and not section._created:
+ # If the section wasn't created (i.e. it wasn't missing)
+ # then we can't return False, we need to preserve errors
+ ret_false = False
+ #
+ if ret_false and preserve_errors and out:
+ # If we are preserving errors, but all
+ # the failures are from missing sections / values
+ # then we can return False. Otherwise there is a
+ # real failure that we need to preserve.
+ ret_false = not any(out.values())
+ if ret_true:
+ return True
+ elif ret_false:
+ return False
+ return out
+
+
+ def reset(self):
+ """Clear ConfigObj instance and restore to 'freshly created' state."""
+ self.clear()
+ self._initialise()
+ # FIXME: Should be done by '_initialise', but ConfigObj constructor (and reload)
+ # requires an empty dictionary
+ self.configspec = None
+ # Just to be sure ;-)
+ self._original_configspec = None
+
+
+ def reload(self):
+ """
+ Reload a ConfigObj from file.
+
+ This method raises a ``ReloadError`` if the ConfigObj doesn't have
+ a filename attribute pointing to a file.
+ """
+ if not isinstance(self.filename, basestring):
+ raise ReloadError()
+
+ filename = self.filename
+ current_options = {}
+ for entry in OPTION_DEFAULTS:
+ if entry == 'configspec':
+ continue
+ current_options[entry] = getattr(self, entry)
+
+ configspec = self._original_configspec
+ current_options['configspec'] = configspec
+
+ self.clear()
+ self._initialise(current_options)
+ self._load(filename, configspec)
+
+
+
+class SimpleVal(object):
+ """
+ A simple validator.
+ Can be used to check that all members expected are present.
+
+ To use it, provide a configspec with all your members in (the value given
+ will be ignored). Pass an instance of ``SimpleVal`` to the ``validate``
+ method of your ``ConfigObj``. ``validate`` will return ``True`` if all
+ members are present, or a dictionary with True/False meaning
+ present/missing. (Whole missing sections will be replaced with ``False``)
+ """
+
+ def __init__(self):
+ self.baseErrorClass = ConfigObjError
+
+ def check(self, check, member, missing=False):
+ """A dummy check method, always returns the value unchanged."""
+ if missing:
+ raise self.baseErrorClass()
+ return member
+
+
+def flatten_errors(cfg, res, levels=None, results=None):
+ """
+ An example function that will turn a nested dictionary of results
+ (as returned by ``ConfigObj.validate``) into a flat list.
+
+ ``cfg`` is the ConfigObj instance being checked, ``res`` is the results
+ dictionary returned by ``validate``.
+
+ (This is a recursive function, so you shouldn't use the ``levels`` or
+ ``results`` arguments - they are used by the function.)
+
+ Returns a list of keys that failed. Each member of the list is a tuple::
+
+ ([list of sections...], key, result)
+
+ If ``validate`` was called with ``preserve_errors=False`` (the default)
+ then ``result`` will always be ``False``.
+
+ *list of sections* is a flattened list of sections that the key was found
+ in.
+
+ If the section was missing (or a section was expected and a scalar provided
+ - or vice-versa) then key will be ``None``.
+
+ If the value (or section) was missing then ``result`` will be ``False``.
+
+ If ``validate`` was called with ``preserve_errors=True`` and a value
+ was present, but failed the check, then ``result`` will be the exception
+ object returned. You can use this as a string that describes the failure.
+
+ For example *The value "3" is of the wrong type*.
+ """
+ if levels is None:
+ # first time called
+ levels = []
+ results = []
+ if res == True:
+ return results
+ if res == False or isinstance(res, Exception):
+ results.append((levels[:], None, res))
+ if levels:
+ levels.pop()
+ return results
+ for (key, val) in res.items():
+ if val == True:
+ continue
+ if isinstance(cfg.get(key), dict):
+ # Go down one level
+ levels.append(key)
+ flatten_errors(cfg[key], val, levels, results)
+ continue
+ results.append((levels[:], key, val))
+ #
+ # Go up one level
+ if levels:
+ levels.pop()
+ #
+ return results
+
+
+def get_extra_values(conf, _prepend=()):
+ """
+ Find all the values and sections not in the configspec from a validated
+ ConfigObj.
+
+ ``get_extra_values`` returns a list of tuples where each tuple represents
+ either an extra section, or an extra value.
+
+ The tuples contain two values, a tuple representing the section the value
+ is in and the name of the extra values. For extra values in the top level
+ section the first member will be an empty tuple. For values in the 'foo'
+ section the first member will be ``('foo',)``. For members in the 'bar'
+ subsection of the 'foo' section the first member will be ``('foo', 'bar')``.
+
+ NOTE: If you call ``get_extra_values`` on a ConfigObj instance that hasn't
+ been validated it will return an empty list.
+ """
+ out = []
+
+ out.extend((_prepend, name) for name in conf.extra_values)
+ for name in conf.sections:
+ if name not in conf.extra_values:
+ out.extend(get_extra_values(conf[name], _prepend + (name,)))
+ return out
+
+
+"""*A programming language is a medium of expression.* - Paul Graham"""
projects / mevemon / commitdiff