2
# A config file reader/writer that supports nested sections in config files.
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# Copyright (C) 2005-2006 Michael Foord, Nicola Larosa
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# E-mail: fuzzyman AT voidspace DOT org DOT uk
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# nico AT tekNico DOT net
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# http://www.voidspace.org.uk/python/configobj.html
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# Released subject to the BSD License
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# Please see http://www.voidspace.org.uk/python/license.shtml
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# Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
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# For information about bugfixes, updates and support, please join the
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# ConfigObj mailing list:
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# http://lists.sourceforge.net/lists/listinfo/configobj-develop
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# Comments, suggestions and bug reports welcome.
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from __future__ import generators
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INTP_VER = sys.version_info[:2]
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raise RuntimeError("Python v.2.2 or later needed")
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from types import StringTypes
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from warnings import warn
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from codecs import BOM_UTF8, BOM_UTF16, BOM_UTF16_BE, BOM_UTF16_LE
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# Python 2.2 does not have these
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BOM_UTF8 = '\xef\xbb\xbf'
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# UTF-16, little endian
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BOM_UTF16_LE = '\xff\xfe'
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BOM_UTF16_BE = '\xfe\xff'
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if sys.byteorder == 'little':
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# UTF-16, native endianness
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BOM_UTF16 = BOM_UTF16_LE
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# UTF-16, native endianness
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BOM_UTF16 = BOM_UTF16_BE
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# A dictionary mapping BOM to
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# the encoding to decode with, and what to set the
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# encoding attribute to.
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BOM_UTF8: ('utf_8', None),
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BOM_UTF16_BE: ('utf16_be', 'utf_16'),
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BOM_UTF16_LE: ('utf16_le', 'utf_16'),
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BOM_UTF16: ('utf_16', 'utf_16'),
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# All legal variants of the BOM codecs.
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# TODO: the list of aliases is not meant to be exhaustive, is there a
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'utf16_be': 'utf16_be',
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'utf_16_be': 'utf16_be',
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'utf-16be': 'utf16_be',
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'utf16_le': 'utf16_le',
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'utf_16_le': 'utf16_le',
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'utf-16le': 'utf16_le',
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# Map of encodings to the BOM to write.
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'utf16_be': BOM_UTF16_BE,
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'utf16_le': BOM_UTF16_LE,
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from validate import VdtMissingValue
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VdtMissingValue = None
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"""enumerate for Python 2.2."""
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__version__ = '4.4.0'
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__revision__ = '$Id: configobj.py,v 3.5 2007/07/02 18:20:24 benjamin%smedbergs.us Exp $'
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__docformat__ = "restructuredtext en"
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'DEFAULT_INDENT_TYPE',
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'DEFAULT_INTERPOLATION',
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'InterpolationError',
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'InterpolationLoopError',
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'MissingInterpolationOption',
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'RepeatSectionError',
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DEFAULT_INTERPOLATION = 'configparser'
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DEFAULT_INDENT_TYPE = ' '
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MAX_INTERPOL_DEPTH = 10
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'interpolation': True,
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'raise_errors': False,
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'create_empty': False,
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# option may be set to one of ('', ' ', '\t')
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'default_encoding': None,
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'write_empty_values': False,
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raise ImportError('compiler module not available')
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p = compiler.parse(s)
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return p.getChildren()[1].getChildren()[0].getChildren()[1]
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class UnknownType(Exception):
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m = getattr(self, 'build_' + o.__class__.__name__, None)
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raise UnknownType(o.__class__.__name__)
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def build_List(self, o):
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return map(self.build, o.getChildren())
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def build_Const(self, o):
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def build_Dict(self, o):
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i = iter(map(self.build, o.getChildren()))
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def build_Tuple(self, o):
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return tuple(self.build_List(o))
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def build_Name(self, o):
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if o.name == 'False':
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raise UnknownType('Undefined Name')
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def build_Add(self, o):
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real, imag = map(self.build_Const, o.getChildren())
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raise UnknownType('Add')
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if not isinstance(imag, complex) or imag.real != 0.0:
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raise UnknownType('Add')
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def build_Getattr(self, o):
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parent = self.build(o.expr)
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return getattr(parent, o.attrname)
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def build_UnarySub(self, o):
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return -self.build_Const(o.getChildren()[0])
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def build_UnaryAdd(self, o):
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return self.build_Const(o.getChildren()[0])
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return Builder().build(getObj(s))
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def _splitlines(instring):
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"""Split a string on lines, without losing line endings or truncating."""
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class ConfigObjError(SyntaxError):
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This is the base class for all errors that ConfigObj raises.
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It is a subclass of SyntaxError.
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def __init__(self, message='', line_number=None, line=''):
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self.line_number = line_number
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self.message = message
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SyntaxError.__init__(self, message)
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class NestingError(ConfigObjError):
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This error indicates a level of nesting that doesn't match.
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class ParseError(ConfigObjError):
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This error indicates that a line is badly written.
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It is neither a valid ``key = value`` line,
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nor a valid section marker line.
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class DuplicateError(ConfigObjError):
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The keyword or section specified already exists.
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class ConfigspecError(ConfigObjError):
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An error occured whilst parsing a configspec.
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class InterpolationError(ConfigObjError):
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"""Base class for the two interpolation errors."""
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class InterpolationLoopError(InterpolationError):
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"""Maximum interpolation depth exceeded in string interpolation."""
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def __init__(self, option):
274
InterpolationError.__init__(
276
'interpolation loop detected in value "%s".' % option)
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class RepeatSectionError(ConfigObjError):
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This error indicates additional sections in a section with a
281
``__many__`` (repeated) section.
284
class MissingInterpolationOption(InterpolationError):
285
"""A value specified for interpolation was missing."""
287
def __init__(self, option):
288
InterpolationError.__init__(
290
'missing option "%s" in interpolation.' % option)
292
class UnreprError(ConfigObjError):
293
"""An error parsing in unrepr mode."""
296
class InterpolationEngine(object):
298
A helper class to help perform string interpolation.
300
This class is an abstract base class; its descendants perform
304
# compiled regexp to use in self.interpolate()
305
_KEYCRE = re.compile(r"%\(([^)]*)\)s")
307
def __init__(self, section):
308
# the Section instance that "owns" this engine
309
self.section = section
311
def interpolate(self, key, value):
312
def recursive_interpolate(key, value, section, backtrail):
313
"""The function that does the actual work.
315
``value``: the string we're trying to interpolate.
316
``section``: the section in which that string was found
317
``backtrail``: a dict to keep track of where we've been,
318
to detect and prevent infinite recursion loops
320
This is similar to a depth-first-search algorithm.
322
# Have we been here already?
323
if backtrail.has_key((key, section.name)):
324
# Yes - infinite loop detected
325
raise InterpolationLoopError(key)
326
# Place a marker on our backtrail so we won't come back here again
327
backtrail[(key, section.name)] = 1
329
# Now start the actual work
330
match = self._KEYCRE.search(value)
332
# The actual parsing of the match is implementation-dependent,
333
# so delegate to our helper function
334
k, v, s = self._parse_match(match)
336
# That's the signal that no further interpolation is needed
339
# Further interpolation may be needed to obtain final value
340
replacement = recursive_interpolate(k, v, s, backtrail)
341
# Replace the matched string with its final value
342
start, end = match.span()
343
value = ''.join((value[:start], replacement, value[end:]))
344
new_search_start = start + len(replacement)
345
# Pick up the next interpolation key, if any, for next time
346
# through the while loop
347
match = self._KEYCRE.search(value, new_search_start)
349
# Now safe to come back here again; remove marker from backtrail
350
del backtrail[(key, section.name)]
354
# Back in interpolate(), all we have to do is kick off the recursive
355
# function with appropriate starting values
356
value = recursive_interpolate(key, value, self.section, {})
359
def _fetch(self, key):
360
"""Helper function to fetch values from owning section.
362
Returns a 2-tuple: the value, and the section where it was found.
364
# switch off interpolation before we try and fetch anything !
365
save_interp = self.section.main.interpolation
366
self.section.main.interpolation = False
368
# Start at section that "owns" this InterpolationEngine
369
current_section = self.section
371
# try the current section first
372
val = current_section.get(key)
376
val = current_section.get('DEFAULT', {}).get(key)
379
# move up to parent and try again
380
# top-level's parent is itself
381
if current_section.parent is current_section:
382
# reached top level, time to give up
384
current_section = current_section.parent
386
# restore interpolation to previous value before returning
387
self.section.main.interpolation = save_interp
389
raise MissingInterpolationOption(key)
390
return val, current_section
392
def _parse_match(self, match):
393
"""Implementation-dependent helper function.
395
Will be passed a match object corresponding to the interpolation
396
key we just found (e.g., "%(foo)s" or "$foo"). Should look up that
397
key in the appropriate config file section (using the ``_fetch()``
398
helper function) and return a 3-tuple: (key, value, section)
400
``key`` is the name of the key we're looking for
401
``value`` is the value found for that key
402
``section`` is a reference to the section where it was found
404
``key`` and ``section`` should be None if no further
405
interpolation should be performed on the resulting value
406
(e.g., if we interpolated "$$" and returned "$").
408
raise NotImplementedError
411
class ConfigParserInterpolation(InterpolationEngine):
412
"""Behaves like ConfigParser."""
413
_KEYCRE = re.compile(r"%\(([^)]*)\)s")
415
def _parse_match(self, match):
417
value, section = self._fetch(key)
418
return key, value, section
421
class TemplateInterpolation(InterpolationEngine):
422
"""Behaves like string.Template."""
424
_KEYCRE = re.compile(r"""
426
(?P<escaped>\$) | # Two $ signs
427
(?P<named>[_a-z][_a-z0-9]*) | # $name format
428
{(?P<braced>[^}]*)} # ${name} format
430
""", re.IGNORECASE | re.VERBOSE)
432
def _parse_match(self, match):
433
# Valid name (in or out of braces): fetch value from section
434
key = match.group('named') or match.group('braced')
436
value, section = self._fetch(key)
437
return key, value, section
438
# Escaped delimiter (e.g., $$): return single delimiter
439
if match.group('escaped') is not None:
440
# Return None for key and section to indicate it's time to stop
441
return None, self._delimiter, None
442
# Anything else: ignore completely, just return it unchanged
443
return None, match.group(), None
445
interpolation_engines = {
446
'configparser': ConfigParserInterpolation,
447
'template': TemplateInterpolation,
452
A dictionary-like object that represents a section in a config file.
454
It does string interpolation if the 'interpolation' attribute
455
of the 'main' object is set to True.
457
Interpolation is tried first from this object, then from the 'DEFAULT'
458
section of this object, next from the parent and its 'DEFAULT' section,
459
and so on until the main object is reached.
461
A Section will behave like an ordered dictionary - following the
462
order of the ``scalars`` and ``sections`` attributes.
463
You can use this to change the order of members.
465
Iteration follows the order: scalars, then sections.
468
def __init__(self, parent, depth, main, indict=None, name=None):
470
* parent is the section above
471
* depth is the depth level of this section
472
* main is the main ConfigObj
473
* indict is a dictionary to initialise the section with
478
# used for nesting level *and* interpolation
480
# used for the interpolation attribute
482
# level of nesting depth of this Section
484
# the sequence of scalar values in this Section
486
# the sequence of sections in this Section
488
# purely for information
492
self.inline_comments = {}
496
self._configspec_comments = {}
497
self._configspec_inline_comments = {}
498
self._cs_section_comments = {}
499
self._cs_section_inline_comments = {}
503
# we do this explicitly so that __setitem__ is used properly
504
# (rather than just passing to ``dict.__init__``)
506
self[entry] = indict[entry]
508
def _interpolate(self, key, value):
510
# do we already have an interpolation engine?
511
engine = self._interpolation_engine
512
except AttributeError:
513
# not yet: first time running _interpolate(), so pick the engine
514
name = self.main.interpolation
515
if name == True: # note that "if name:" would be incorrect here
516
# backwards-compatibility: interpolation=True means use default
517
name = DEFAULT_INTERPOLATION
518
name = name.lower() # so that "Template", "template", etc. all work
519
class_ = interpolation_engines.get(name, None)
521
# invalid value for self.main.interpolation
522
self.main.interpolation = False
525
# save reference to engine so we don't have to do this again
526
engine = self._interpolation_engine = class_(self)
527
# let the engine do the actual work
528
return engine.interpolate(key, value)
530
def __getitem__(self, key):
531
"""Fetch the item and do string interpolation."""
532
val = dict.__getitem__(self, key)
533
if self.main.interpolation and isinstance(val, StringTypes):
534
return self._interpolate(key, val)
537
def __setitem__(self, key, value, unrepr=False):
539
Correctly set a value.
541
Making dictionary values Section instances.
542
(We have to special case 'Section' instances - which are also dicts)
544
Keys must be strings.
545
Values need only be strings (or lists of strings) if
546
``main.stringify`` is set.
548
`unrepr`` must be set when setting a value to a dictionary, without
549
creating a new sub-section.
551
if not isinstance(key, StringTypes):
552
raise ValueError, 'The key "%s" is not a string.' % key
554
if not self.comments.has_key(key):
555
self.comments[key] = []
556
self.inline_comments[key] = ''
557
# remove the entry from defaults
558
if key in self.defaults:
559
self.defaults.remove(key)
561
if isinstance(value, Section):
562
if not self.has_key(key):
563
self.sections.append(key)
564
dict.__setitem__(self, key, value)
565
elif isinstance(value, dict) and not unrepr:
566
# First create the new depth level,
567
# then create the section
568
if not self.has_key(key):
569
self.sections.append(key)
570
new_depth = self.depth + 1
581
if not self.has_key(key):
582
self.scalars.append(key)
583
if not self.main.stringify:
584
if isinstance(value, StringTypes):
586
elif isinstance(value, (list, tuple)):
588
if not isinstance(entry, StringTypes):
590
'Value is not a string "%s".' % entry)
592
raise TypeError, 'Value is not a string "%s".' % value
593
dict.__setitem__(self, key, value)
595
def __delitem__(self, key):
596
"""Remove items from the sequence when deleting."""
597
dict. __delitem__(self, key)
598
if key in self.scalars:
599
self.scalars.remove(key)
601
self.sections.remove(key)
602
del self.comments[key]
603
del self.inline_comments[key]
605
def get(self, key, default=None):
606
"""A version of ``get`` that doesn't bypass string interpolation."""
612
def update(self, indict):
614
A version of update that uses our ``__setitem__``.
617
self[entry] = indict[entry]
619
def pop(self, key, *args):
621
val = dict.pop(self, key, *args)
622
if key in self.scalars:
623
del self.comments[key]
624
del self.inline_comments[key]
625
self.scalars.remove(key)
626
elif key in self.sections:
627
del self.comments[key]
628
del self.inline_comments[key]
629
self.sections.remove(key)
630
if self.main.interpolation and isinstance(val, StringTypes):
631
return self._interpolate(key, val)
635
"""Pops the first (key,val)"""
636
sequence = (self.scalars + self.sections)
638
raise KeyError, ": 'popitem(): dictionary is empty'"
646
A version of clear that also affects scalars/sections
647
Also clears comments and configspec.
649
Leaves other attributes alone :
650
depth/main/parent are not affected
656
self.inline_comments = {}
659
def setdefault(self, key, default=None):
660
"""A version of setdefault that sets sequence if appropriate."""
669
return zip((self.scalars + self.sections), self.values())
673
return (self.scalars + self.sections)
677
return [self[key] for key in (self.scalars + self.sections)]
681
return iter(self.items())
685
return iter((self.scalars + self.sections))
689
def itervalues(self):
691
return iter(self.values())
694
return '{%s}' % ', '.join([('%s: %s' % (repr(key), repr(self[key])))
695
for key in (self.scalars + self.sections)])
699
# Extra methods - not in a normal dictionary
703
Return a deepcopy of self as a dictionary.
705
All members that are ``Section`` instances are recursively turned to
706
ordinary dictionaries - by calling their ``dict`` method.
716
this_entry = self[entry]
717
if isinstance(this_entry, Section):
718
this_entry = this_entry.dict()
719
elif isinstance(this_entry, list):
720
# create a copy rather than a reference
721
this_entry = list(this_entry)
722
elif isinstance(this_entry, tuple):
723
# create a copy rather than a reference
724
this_entry = tuple(this_entry)
725
newdict[entry] = this_entry
728
def merge(self, indict):
730
A recursive update - useful for merging config files.
732
>>> a = '''[section1]
735
... more_options = False
736
... # end of file'''.splitlines()
737
>>> b = '''# File is user.ini
740
... # end of file'''.splitlines()
741
>>> c1 = ConfigObj(b)
742
>>> c2 = ConfigObj(a)
745
{'section1': {'option1': 'False', 'subsection': {'more_options': 'False'}}}
747
for key, val in indict.items():
748
if (key in self and isinstance(self[key], dict) and
749
isinstance(val, dict)):
754
def rename(self, oldkey, newkey):
756
Change a keyname to another, without changing position in sequence.
758
Implemented so that transformations can be made on keys,
759
as well as on values. (used by encode and decode)
761
Also renames comments.
763
if oldkey in self.scalars:
764
the_list = self.scalars
765
elif oldkey in self.sections:
766
the_list = self.sections
768
raise KeyError, 'Key "%s" not found.' % oldkey
769
pos = the_list.index(oldkey)
772
dict.__delitem__(self, oldkey)
773
dict.__setitem__(self, newkey, val)
774
the_list.remove(oldkey)
775
the_list.insert(pos, newkey)
776
comm = self.comments[oldkey]
777
inline_comment = self.inline_comments[oldkey]
778
del self.comments[oldkey]
779
del self.inline_comments[oldkey]
780
self.comments[newkey] = comm
781
self.inline_comments[newkey] = inline_comment
783
def walk(self, function, raise_errors=True,
784
call_on_sections=False, **keywargs):
786
Walk every member and call a function on the keyword and value.
788
Return a dictionary of the return values
790
If the function raises an exception, raise the errror
791
unless ``raise_errors=False``, in which case set the return value to
794
Any unrecognised keyword arguments you pass to walk, will be pased on
795
to the function you pass in.
797
Note: if ``call_on_sections`` is ``True`` then - on encountering a
798
subsection, *first* the function is called for the *whole* subsection,
799
and then recurses into its members. This means your function must be
800
able to handle strings, dictionaries and lists. This allows you
801
to change the key of subsections as well as for ordinary members. The
802
return value when called on the whole subsection has to be discarded.
804
See the encode and decode methods for examples, including functions.
808
You can use ``walk`` to transform the names of members of a section
809
but you mustn't add or delete members.
811
>>> config = '''[XXXXsection]
812
... XXXXkey = XXXXvalue'''.splitlines()
813
>>> cfg = ConfigObj(config)
815
{'XXXXsection': {'XXXXkey': 'XXXXvalue'}}
816
>>> def transform(section, key):
817
... val = section[key]
818
... newkey = key.replace('XXXX', 'CLIENT1')
819
... section.rename(key, newkey)
820
... if isinstance(val, (tuple, list, dict)):
823
... val = val.replace('XXXX', 'CLIENT1')
824
... section[newkey] = val
825
>>> cfg.walk(transform, call_on_sections=True)
826
{'CLIENT1section': {'CLIENT1key': None}}
828
{'CLIENT1section': {'CLIENT1key': 'CLIENT1value'}}
832
for i in range(len(self.scalars)):
833
entry = self.scalars[i]
835
val = function(self, entry, **keywargs)
836
# bound again in case name has changed
837
entry = self.scalars[i]
843
entry = self.scalars[i]
846
for i in range(len(self.sections)):
847
entry = self.sections[i]
850
function(self, entry, **keywargs)
855
entry = self.sections[i]
857
# bound again in case name has changed
858
entry = self.sections[i]
859
# previous result is discarded
860
out[entry] = self[entry].walk(
862
raise_errors=raise_errors,
863
call_on_sections=call_on_sections,
867
def decode(self, encoding):
869
Decode all strings and values to unicode, using the specified encoding.
871
Works with subsections and list values.
873
Uses the ``walk`` method.
875
Testing ``encode`` and ``decode``.
877
>>> m.decode('ascii')
878
>>> def testuni(val):
879
... for entry in val:
880
... if not isinstance(entry, unicode):
881
... print >> sys.stderr, type(entry)
882
... raise AssertionError, 'decode failed.'
883
... if isinstance(val[entry], dict):
884
... testuni(val[entry])
885
... elif not isinstance(val[entry], unicode):
886
... raise AssertionError, 'decode failed.'
888
>>> m.encode('ascii')
892
warn('use of ``decode`` is deprecated.', DeprecationWarning)
893
def decode(section, key, encoding=encoding, warn=True):
896
if isinstance(val, (list, tuple)):
899
newval.append(entry.decode(encoding))
900
elif isinstance(val, dict):
903
newval = val.decode(encoding)
904
newkey = key.decode(encoding)
905
section.rename(key, newkey)
906
section[newkey] = newval
907
# using ``call_on_sections`` allows us to modify section names
908
self.walk(decode, call_on_sections=True)
910
def encode(self, encoding):
912
Encode all strings and values from unicode,
913
using the specified encoding.
915
Works with subsections and list values.
916
Uses the ``walk`` method.
918
warn('use of ``encode`` is deprecated.', DeprecationWarning)
919
def encode(section, key, encoding=encoding):
922
if isinstance(val, (list, tuple)):
925
newval.append(entry.encode(encoding))
926
elif isinstance(val, dict):
929
newval = val.encode(encoding)
930
newkey = key.encode(encoding)
931
section.rename(key, newkey)
932
section[newkey] = newval
933
self.walk(encode, call_on_sections=True)
935
def istrue(self, key):
936
"""A deprecated version of ``as_bool``."""
937
warn('use of ``istrue`` is deprecated. Use ``as_bool`` method '
938
'instead.', DeprecationWarning)
939
return self.as_bool(key)
941
def as_bool(self, key):
943
Accepts a key as input. The corresponding value must be a string or
944
the objects (``True`` or 1) or (``False`` or 0). We allow 0 and 1 to
945
retain compatibility with Python 2.2.
947
If the string is one of ``True``, ``On``, ``Yes``, or ``1`` it returns
950
If the string is one of ``False``, ``Off``, ``No``, or ``0`` it returns
953
``as_bool`` is not case sensitive.
955
Any other input will raise a ``ValueError``.
960
Traceback (most recent call last):
961
ValueError: Value "fish" is neither True nor False
976
if not isinstance(val, StringTypes):
979
return self.main._bools[val.lower()]
981
raise ValueError('Value "%s" is neither True nor False' % val)
983
def as_int(self, key):
985
A convenience method which coerces the specified value to an integer.
987
If the value is an invalid literal for ``int``, a ``ValueError`` will
993
Traceback (most recent call last):
994
ValueError: invalid literal for int(): fish
1000
Traceback (most recent call last):
1001
ValueError: invalid literal for int(): 3.2
1003
return int(self[key])
1005
def as_float(self, key):
1007
A convenience method which coerces the specified value to a float.
1009
If the value is an invalid literal for ``float``, a ``ValueError`` will
1015
Traceback (most recent call last):
1016
ValueError: invalid literal for float(): fish
1024
return float(self[key])
1027
class ConfigObj(Section):
1028
"""An object to read, create, and write config files."""
1030
_keyword = re.compile(r'''^ # line start
1033
(?:".*?")| # double quotes
1034
(?:'.*?')| # single quotes
1035
(?:[^'"=].*?) # no quotes
1038
(.*) # value (including list values and comments)
1043
_sectionmarker = re.compile(r'''^
1044
(\s*) # 1: indentation
1045
((?:\[\s*)+) # 2: section marker open
1046
( # 3: section name open
1047
(?:"\s*\S.*?\s*")| # at least one non-space with double quotes
1048
(?:'\s*\S.*?\s*')| # at least one non-space with single quotes
1049
(?:[^'"\s].*?) # at least one non-space unquoted
1050
) # section name close
1051
((?:\s*\])+) # 4: section marker close
1052
\s*(\#.*)? # 5: optional comment
1056
# this regexp pulls list values out as a single string
1057
# or single values and comments
1058
# FIXME: this regex adds a '' to the end of comma terminated lists
1059
# workaround in ``_handle_value``
1060
_valueexp = re.compile(r'''^
1066
(?:".*?")| # double quotes
1067
(?:'.*?')| # single quotes
1068
(?:[^'",\#][^,\#]*?) # unquoted
1071
)* # match all list items ending in a comma (if any)
1074
(?:".*?")| # double quotes
1075
(?:'.*?')| # single quotes
1076
(?:[^'",\#\s][^,]*?)| # unquoted
1077
(?:(?<!,)) # Empty value
1078
)? # last item in a list - or string value
1080
(,) # alternatively a single comma - empty list
1082
\s*(\#.*)? # optional comment
1086
# use findall to get the members of a list value
1087
_listvalueexp = re.compile(r'''
1089
(?:".*?")| # double quotes
1090
(?:'.*?')| # single quotes
1091
(?:[^'",\#].*?) # unquoted
1097
# this regexp is used for the value
1098
# when lists are switched off
1099
_nolistvalue = re.compile(r'''^
1101
(?:".*?")| # double quotes
1102
(?:'.*?')| # single quotes
1103
(?:[^'"\#].*?)| # unquoted
1106
\s*(\#.*)? # optional comment
1110
# regexes for finding triple quoted values on one line
1111
_single_line_single = re.compile(r"^'''(.*?)'''\s*(#.*)?$")
1112
_single_line_double = re.compile(r'^"""(.*?)"""\s*(#.*)?$')
1113
_multi_line_single = re.compile(r"^(.*?)'''\s*(#.*)?$")
1114
_multi_line_double = re.compile(r'^(.*?)"""\s*(#.*)?$')
1117
"'''": (_single_line_single, _multi_line_single),
1118
'"""': (_single_line_double, _multi_line_double),
1121
# Used by the ``istrue`` Section method
1123
'yes': True, 'no': False,
1124
'on': True, 'off': False,
1125
'1': True, '0': False,
1126
'true': True, 'false': False,
1129
def __init__(self, infile=None, options=None, **kwargs):
1131
Parse or create a config file object.
1133
``ConfigObj(infile=None, options=None, **kwargs)``
1140
options = dict(options)
1141
# keyword arguments take precedence over an options dictionary
1142
options.update(kwargs)
1143
# init the superclass
1144
Section.__init__(self, self, 0, self)
1146
defaults = OPTION_DEFAULTS.copy()
1147
for entry in options.keys():
1148
if entry not in defaults.keys():
1149
raise TypeError, 'Unrecognised option "%s".' % entry
1150
# TODO: check the values too.
1152
# Add any explicit options to the defaults
1153
defaults.update(options)
1155
# initialise a few variables
1156
self.filename = None
1158
self.raise_errors = defaults['raise_errors']
1159
self.interpolation = defaults['interpolation']
1160
self.list_values = defaults['list_values']
1161
self.create_empty = defaults['create_empty']
1162
self.file_error = defaults['file_error']
1163
self.stringify = defaults['stringify']
1164
self.indent_type = defaults['indent_type']
1165
self.encoding = defaults['encoding']
1166
self.default_encoding = defaults['default_encoding']
1168
self.newlines = None
1169
self.write_empty_values = defaults['write_empty_values']
1170
self.unrepr = defaults['unrepr']
1172
self.initial_comment = []
1173
self.final_comment = []
1175
self._terminated = False
1177
if isinstance(infile, StringTypes):
1178
self.filename = infile
1179
if os.path.isfile(infile):
1180
infile = open(infile).read() or []
1181
elif self.file_error:
1182
# raise an error if the file doesn't exist
1183
raise IOError, 'Config file not found: "%s".' % self.filename
1185
# file doesn't already exist
1186
if self.create_empty:
1187
# this is a good test that the filename specified
1188
# isn't impossible - like on a non existent device
1189
h = open(infile, 'w')
1193
elif isinstance(infile, (list, tuple)):
1194
infile = list(infile)
1195
elif isinstance(infile, dict):
1197
# the Section class handles creating subsections
1198
if isinstance(infile, ConfigObj):
1199
# get a copy of our ConfigObj
1200
infile = infile.dict()
1201
for entry in infile:
1202
self[entry] = infile[entry]
1204
if defaults['configspec'] is not None:
1205
self._handle_configspec(defaults['configspec'])
1207
self.configspec = None
1209
elif hasattr(infile, 'read'):
1210
# This supports file like objects
1211
infile = infile.read() or []
1212
# needs splitting into lines - but needs doing *after* decoding
1213
# in case it's not an 8 bit encoding
1215
raise TypeError, ('infile must be a filename,'
1216
' file like object, or list of lines.')
1219
# don't do it for the empty ConfigObj
1220
infile = self._handle_bom(infile)
1221
# infile is now *always* a list
1223
# Set the newlines attribute (first line ending it finds)
1224
# and strip trailing '\n' or '\r' from lines
1226
if (not line) or (line[-1] not in ('\r', '\n', '\r\n')):
1228
for end in ('\r\n', '\n', '\r'):
1229
if line.endswith(end):
1233
if infile[-1] and infile[-1] in ('\r', '\n', '\r\n'):
1234
self._terminated = True
1235
infile = [line.rstrip('\r\n') for line in infile]
1238
# if we had any errors, now is the time to raise them
1240
info = "at line %s." % self._errors[0].line_number
1241
if len(self._errors) > 1:
1242
msg = ("Parsing failed with several errors.\nFirst error %s" %
1244
error = ConfigObjError(msg)
1246
error = self._errors[0]
1247
# set the errors attribute; it's a list of tuples:
1248
# (error_type, message, line_number)
1249
error.errors = self._errors
1250
# set the config attribute
1253
# delete private attributes
1256
if defaults['configspec'] is None:
1257
self.configspec = None
1259
self._handle_configspec(defaults['configspec'])
1262
return 'ConfigObj({%s})' % ', '.join(
1263
[('%s: %s' % (repr(key), repr(self[key]))) for key in
1264
(self.scalars + self.sections)])
1266
def _handle_bom(self, infile):
1268
Handle any BOM, and decode if necessary.
1270
If an encoding is specified, that *must* be used - but the BOM should
1271
still be removed (and the BOM attribute set).
1273
(If the encoding is wrongly specified, then a BOM for an alternative
1274
encoding won't be discovered or removed.)
1276
If an encoding is not specified, UTF8 or UTF16 BOM will be detected and
1277
removed. The BOM attribute will be set. UTF16 will be decoded to
1280
NOTE: This method must not be called with an empty ``infile``.
1282
Specifying the *wrong* encoding is likely to cause a
1283
``UnicodeDecodeError``.
1285
``infile`` must always be returned as a list of lines, but may be
1286
passed in as a single string.
1288
if ((self.encoding is not None) and
1289
(self.encoding.lower() not in BOM_LIST)):
1290
# No need to check for a BOM
1291
# the encoding specified doesn't have one
1293
return self._decode(infile, self.encoding)
1295
if isinstance(infile, (list, tuple)):
1299
if self.encoding is not None:
1300
# encoding explicitly supplied
1301
# And it could have an associated BOM
1302
# TODO: if encoding is just UTF16 - we ought to check for both
1303
# TODO: big endian and little endian versions.
1304
enc = BOM_LIST[self.encoding.lower()]
1306
# For UTF16 we try big endian and little endian
1307
for BOM, (encoding, final_encoding) in BOMS.items():
1308
if not final_encoding:
1311
if infile.startswith(BOM):
1314
# Don't need to remove BOM
1315
return self._decode(infile, encoding)
1317
# If we get this far, will *probably* raise a DecodeError
1318
# As it doesn't appear to start with a BOM
1319
return self._decode(infile, self.encoding)
1323
if not line.startswith(BOM):
1324
return self._decode(infile, self.encoding)
1326
newline = line[len(BOM):]
1329
if isinstance(infile, (list, tuple)):
1334
return self._decode(infile, self.encoding)
1336
# No encoding specified - so we need to check for UTF8/UTF16
1337
for BOM, (encoding, final_encoding) in BOMS.items():
1338
if not line.startswith(BOM):
1342
self.encoding = final_encoding
1343
if not final_encoding:
1347
newline = line[len(BOM):]
1348
if isinstance(infile, (list, tuple)):
1352
# UTF8 - don't decode
1353
if isinstance(infile, StringTypes):
1354
return infile.splitlines(True)
1357
# UTF16 - have to decode
1358
return self._decode(infile, encoding)
1360
# No BOM discovered and no encoding specified, just return
1361
if isinstance(infile, StringTypes):
1362
# infile read from a file will be a single string
1363
return infile.splitlines(True)
1367
def _a_to_u(self, aString):
1368
"""Decode ASCII strings to unicode if a self.encoding is specified."""
1370
return aString.decode('ascii')
1374
def _decode(self, infile, encoding):
1376
Decode infile to unicode. Using the specified encoding.
1378
if is a string, it also needs converting to a list.
1380
if isinstance(infile, StringTypes):
1382
# NOTE: Could raise a ``UnicodeDecodeError``
1383
return infile.decode(encoding).splitlines(True)
1384
for i, line in enumerate(infile):
1385
if not isinstance(line, unicode):
1386
# NOTE: The isinstance test here handles mixed lists of unicode/string
1387
# NOTE: But the decode will break on any non-string values
1388
# NOTE: Or could raise a ``UnicodeDecodeError``
1389
infile[i] = line.decode(encoding)
1392
def _decode_element(self, line):
1393
"""Decode element to unicode if necessary."""
1394
if not self.encoding:
1396
if isinstance(line, str) and self.default_encoding:
1397
return line.decode(self.default_encoding)
1400
def _str(self, value):
1402
Used by ``stringify`` within validate, to turn non-string values
1405
if not isinstance(value, StringTypes):
1410
def _parse(self, infile):
1411
"""Actually parse the config file."""
1412
temp_list_values = self.list_values
1414
self.list_values = False
1418
maxline = len(infile) - 1
1420
reset_comment = False
1421
while cur_index < maxline:
1425
line = infile[cur_index]
1426
sline = line.strip()
1427
# do we have anything on the line ?
1428
if not sline or sline.startswith('#') or sline.startswith(';'):
1429
reset_comment = False
1430
comment_list.append(line)
1433
# preserve initial comment
1434
self.initial_comment = comment_list
1437
reset_comment = True
1438
# first we check if it's a section marker
1439
mat = self._sectionmarker.match(line)
1442
(indent, sect_open, sect_name, sect_close, comment) = (
1444
if indent and (self.indent_type is None):
1445
self.indent_type = indent
1446
cur_depth = sect_open.count('[')
1447
if cur_depth != sect_close.count(']'):
1449
"Cannot compute the section depth at line %s.",
1450
NestingError, infile, cur_index)
1453
if cur_depth < this_section.depth:
1454
# the new section is dropping back to a previous level
1456
parent = self._match_depth(
1461
"Cannot compute nesting level at line %s.",
1462
NestingError, infile, cur_index)
1464
elif cur_depth == this_section.depth:
1465
# the new section is a sibling of the current section
1466
parent = this_section.parent
1467
elif cur_depth == this_section.depth + 1:
1468
# the new section is a child the current section
1469
parent = this_section
1472
"Section too nested at line %s.",
1473
NestingError, infile, cur_index)
1475
sect_name = self._unquote(sect_name)
1476
if parent.has_key(sect_name):
1478
'Duplicate section name at line %s.',
1479
DuplicateError, infile, cur_index)
1481
# create the new section
1482
this_section = Section(
1487
parent[sect_name] = this_section
1488
parent.inline_comments[sect_name] = comment
1489
parent.comments[sect_name] = comment_list
1492
# it's not a section marker,
1493
# so it should be a valid ``key = value`` line
1494
mat = self._keyword.match(line)
1496
# it neither matched as a keyword
1497
# or a section marker
1499
'Invalid line at line "%s".',
1500
ParseError, infile, cur_index)
1502
# is a keyword value
1503
# value will include any inline comment
1504
(indent, key, value) = mat.groups()
1505
if indent and (self.indent_type is None):
1506
self.indent_type = indent
1507
# check for a multiline value
1508
if value[:3] in ['"""', "'''"]:
1510
(value, comment, cur_index) = self._multiline(
1511
value, infile, cur_index, maxline)
1514
'Parse error in value at line %s.',
1515
ParseError, infile, cur_index)
1521
value = unrepr(value)
1522
except Exception, e:
1523
if type(e) == UnknownType:
1524
msg = 'Unknown name or type in value at line %s.'
1526
msg = 'Parse error in value at line %s.'
1527
self._handle_error(msg, UnreprError, infile,
1534
value = unrepr(value)
1535
except Exception, e:
1536
if isinstance(e, UnknownType):
1537
msg = 'Unknown name or type in value at line %s.'
1539
msg = 'Parse error in value at line %s.'
1540
self._handle_error(msg, UnreprError, infile,
1544
# extract comment and lists
1546
(value, comment) = self._handle_value(value)
1549
'Parse error in value at line %s.',
1550
ParseError, infile, cur_index)
1553
key = self._unquote(key)
1554
if this_section.has_key(key):
1556
'Duplicate keyword name at line %s.',
1557
DuplicateError, infile, cur_index)
1560
# we set unrepr because if we have got this far we will never
1561
# be creating a new section
1562
this_section.__setitem__(key, value, unrepr=True)
1563
this_section.inline_comments[key] = comment
1564
this_section.comments[key] = comment_list
1567
if self.indent_type is None:
1568
# no indentation used, set the type accordingly
1569
self.indent_type = ''
1571
if self._terminated:
1572
comment_list.append('')
1573
# preserve the final comment
1574
if not self and not self.initial_comment:
1575
self.initial_comment = comment_list
1576
elif not reset_comment:
1577
self.final_comment = comment_list
1578
self.list_values = temp_list_values
1580
def _match_depth(self, sect, depth):
1582
Given a section and a depth level, walk back through the sections
1583
parents to see if the depth level matches a previous section.
1585
Return a reference to the right section,
1586
or raise a SyntaxError.
1588
while depth < sect.depth:
1589
if sect is sect.parent:
1590
# we've reached the top level already
1593
if sect.depth == depth:
1595
# shouldn't get here
1598
def _handle_error(self, text, ErrorClass, infile, cur_index):
1600
Handle an error according to the error settings.
1602
Either raise the error or store it.
1603
The error will have occured at ``cur_index``
1605
line = infile[cur_index]
1607
message = text % cur_index
1608
error = ErrorClass(message, cur_index, line)
1609
if self.raise_errors:
1610
# raise the error - parsing stops here
1613
# reraise when parsing has finished
1614
self._errors.append(error)
1616
def _unquote(self, value):
1617
"""Return an unquoted version of a value"""
1618
if (value[0] == value[-1]) and (value[0] in ('"', "'")):
1622
def _quote(self, value, multiline=True):
1624
Return a safely quoted version of a value.
1626
Raise a ConfigObjError if the value cannot be safely quoted.
1627
If multiline is ``True`` (default) then use triple quotes
1630
Don't quote values that don't need it.
1631
Recursively quote members of a list and return a comma joined list.
1632
Multiline is ``False`` for lists.
1633
Obey list syntax for empty and single member lists.
1635
If ``list_values=False`` then the value is only quoted if it contains
1636
a ``\n`` (is multiline).
1638
If ``write_empty_values`` is set, and the value is an empty string, it
1641
if multiline and self.write_empty_values and value == '':
1642
# Only if multiline is set, so that it is used for values not
1643
# keys, and not values that are part of a list
1645
if multiline and isinstance(value, (list, tuple)):
1648
elif len(value) == 1:
1649
return self._quote(value[0], multiline=False) + ','
1650
return ', '.join([self._quote(val, multiline=False)
1652
if not isinstance(value, StringTypes):
1656
raise TypeError, 'Value "%s" is not a string.' % value
1660
wspace_plus = ' \r\t\n\v\t\'"'
1665
if (not self.list_values and '\n' not in value) or not (multiline and
1666
((("'" in value) and ('"' in value)) or ('\n' in value))):
1667
if not self.list_values:
1668
# we don't quote if ``list_values=False``
1670
# for normal values either single or double quotes will do
1672
# will only happen if multiline is off - e.g. '\n' in key
1673
raise ConfigObjError, ('Value "%s" cannot be safely quoted.' %
1675
elif ((value[0] not in wspace_plus) and
1676
(value[-1] not in wspace_plus) and
1677
(',' not in value)):
1680
if ("'" in value) and ('"' in value):
1681
raise ConfigObjError, (
1682
'Value "%s" cannot be safely quoted.' % value)
1688
# if value has '\n' or "'" *and* '"', it will need triple quotes
1689
if (value.find('"""') != -1) and (value.find("'''") != -1):
1690
raise ConfigObjError, (
1691
'Value "%s" cannot be safely quoted.' % value)
1692
if value.find('"""') == -1:
1698
def _handle_value(self, value):
1700
Given a value string, unquote, remove comment,
1701
handle lists. (including empty and single member lists)
1703
# do we look for lists in values ?
1704
if not self.list_values:
1705
mat = self._nolistvalue.match(value)
1708
# NOTE: we don't unquote here
1711
mat = self._valueexp.match(value)
1713
# the value is badly constructed, probably badly quoted,
1714
# or an invalid list
1716
(list_values, single, empty_list, comment) = mat.groups()
1717
if (list_values == '') and (single is None):
1718
# change this if you want to accept empty values
1720
# NOTE: note there is no error handling from here if the regex
1721
# is wrong: then incorrect values will slip through
1722
if empty_list is not None:
1723
# the single comma - meaning an empty list
1724
return ([], comment)
1725
if single is not None:
1726
# handle empty values
1727
if list_values and not single:
1728
# FIXME: the '' is a workaround because our regex now matches
1729
# '' at the end of a list if it has a trailing comma
1732
single = single or '""'
1733
single = self._unquote(single)
1734
if list_values == '':
1736
return (single, comment)
1737
the_list = self._listvalueexp.findall(list_values)
1738
the_list = [self._unquote(val) for val in the_list]
1739
if single is not None:
1740
the_list += [single]
1741
return (the_list, comment)
1743
def _multiline(self, value, infile, cur_index, maxline):
1744
"""Extract the value, where we are in a multiline situation."""
1746
newvalue = value[3:]
1747
single_line = self._triple_quote[quot][0]
1748
multi_line = self._triple_quote[quot][1]
1749
mat = single_line.match(value)
1751
retval = list(mat.groups())
1752
retval.append(cur_index)
1754
elif newvalue.find(quot) != -1:
1755
# somehow the triple quote is missing
1758
while cur_index < maxline:
1761
line = infile[cur_index]
1762
if line.find(quot) == -1:
1765
# end of multiline, process it
1768
# we've got to the end of the config, oops...
1770
mat = multi_line.match(line)
1772
# a badly formed line
1774
(value, comment) = mat.groups()
1775
return (newvalue + value, comment, cur_index)
1777
def _handle_configspec(self, configspec):
1778
"""Parse the configspec."""
1779
# FIXME: Should we check that the configspec was created with the
1780
# correct settings ? (i.e. ``list_values=False``)
1781
if not isinstance(configspec, ConfigObj):
1783
configspec = ConfigObj(
1788
except ConfigObjError, e:
1789
# FIXME: Should these errors have a reference
1790
# to the already parsed ConfigObj ?
1791
raise ConfigspecError('Parsing configspec failed: %s' % e)
1793
raise IOError('Reading configspec failed: %s' % e)
1794
self._set_configspec_value(configspec, self)
1796
def _set_configspec_value(self, configspec, section):
1797
"""Used to recursively set configspec values."""
1798
if '__many__' in configspec.sections:
1799
section.configspec['__many__'] = configspec['__many__']
1800
if len(configspec.sections) > 1:
1801
# FIXME: can we supply any useful information here ?
1802
raise RepeatSectionError
1803
if hasattr(configspec, 'initial_comment'):
1804
section._configspec_initial_comment = configspec.initial_comment
1805
section._configspec_final_comment = configspec.final_comment
1806
section._configspec_encoding = configspec.encoding
1807
section._configspec_BOM = configspec.BOM
1808
section._configspec_newlines = configspec.newlines
1809
section._configspec_indent_type = configspec.indent_type
1810
for entry in configspec.scalars:
1811
section._configspec_comments[entry] = configspec.comments[entry]
1812
section._configspec_inline_comments[entry] = (
1813
configspec.inline_comments[entry])
1814
section.configspec[entry] = configspec[entry]
1815
section._order.append(entry)
1816
for entry in configspec.sections:
1817
if entry == '__many__':
1819
section._cs_section_comments[entry] = configspec.comments[entry]
1820
section._cs_section_inline_comments[entry] = (
1821
configspec.inline_comments[entry])
1822
if not section.has_key(entry):
1824
self._set_configspec_value(configspec[entry], section[entry])
1826
def _handle_repeat(self, section, configspec):
1827
"""Dynamically assign configspec for repeated section."""
1829
section_keys = configspec.sections
1830
scalar_keys = configspec.scalars
1831
except AttributeError:
1832
section_keys = [entry for entry in configspec
1833
if isinstance(configspec[entry], dict)]
1834
scalar_keys = [entry for entry in configspec
1835
if not isinstance(configspec[entry], dict)]
1836
if '__many__' in section_keys and len(section_keys) > 1:
1837
# FIXME: can we supply any useful information here ?
1838
raise RepeatSectionError
1841
for entry in scalar_keys:
1842
val = configspec[entry]
1843
scalars[entry] = val
1844
for entry in section_keys:
1845
val = configspec[entry]
1846
if entry == '__many__':
1847
scalars[entry] = val
1849
sections[entry] = val
1851
section.configspec = scalars
1852
for entry in sections:
1853
if not section.has_key(entry):
1855
self._handle_repeat(section[entry], sections[entry])
1857
def _write_line(self, indent_string, entry, this_entry, comment):
1858
"""Write an individual line, for the write method"""
1859
# NOTE: the calls to self._quote here handles non-StringType values.
1861
val = self._decode_element(self._quote(this_entry))
1863
val = repr(this_entry)
1864
return '%s%s%s%s%s' % (
1866
self._decode_element(self._quote(entry, multiline=False)),
1867
self._a_to_u(' = '),
1869
self._decode_element(comment))
1871
def _write_marker(self, indent_string, depth, entry, comment):
1872
"""Write a section marker line"""
1873
return '%s%s%s%s%s' % (
1875
self._a_to_u('[' * depth),
1876
self._quote(self._decode_element(entry), multiline=False),
1877
self._a_to_u(']' * depth),
1878
self._decode_element(comment))
1880
def _handle_comment(self, comment):
1881
"""Deal with a comment."""
1884
start = self.indent_type
1885
if not comment.startswith('#'):
1886
start += self._a_to_u(' # ')
1887
return (start + comment)
1891
def write(self, outfile=None, section=None):
1893
Write the current ConfigObj as a file
1895
tekNico: FIXME: use StringIO instead of real files
1897
>>> filename = a.filename
1898
>>> a.filename = 'test.ini'
1900
>>> a.filename = filename
1901
>>> a == ConfigObj('test.ini', raise_errors=True)
1904
if self.indent_type is None:
1905
# this can be true if initialised from a dictionary
1906
self.indent_type = DEFAULT_INDENT_TYPE
1909
cs = self._a_to_u('#')
1910
csp = self._a_to_u('# ')
1912
int_val = self.interpolation
1913
self.interpolation = False
1915
for line in self.initial_comment:
1916
line = self._decode_element(line)
1917
stripped_line = line.strip()
1918
if stripped_line and not stripped_line.startswith(cs):
1922
indent_string = self.indent_type * section.depth
1923
for entry in (section.scalars + section.sections):
1924
if entry in section.defaults:
1925
# don't write out default values
1927
for comment_line in section.comments[entry]:
1928
comment_line = self._decode_element(comment_line.lstrip())
1929
if comment_line and not comment_line.startswith(cs):
1930
comment_line = csp + comment_line
1931
out.append(indent_string + comment_line)
1932
this_entry = section[entry]
1933
comment = self._handle_comment(section.inline_comments[entry])
1935
if isinstance(this_entry, dict):
1937
out.append(self._write_marker(
1942
out.extend(self.write(section=this_entry))
1944
out.append(self._write_line(
1951
for line in self.final_comment:
1952
line = self._decode_element(line)
1953
stripped_line = line.strip()
1954
if stripped_line and not stripped_line.startswith(cs):
1957
self.interpolation = int_val
1959
if section is not self:
1962
if (self.filename is None) and (outfile is None):
1963
# output a list of lines
1964
# might need to encode
1965
# NOTE: This will *screw* UTF16, each line will start with the BOM
1967
out = [l.encode(self.encoding) for l in out]
1968
if (self.BOM and ((self.encoding is None) or
1969
(BOM_LIST.get(self.encoding.lower()) == 'utf_8'))):
1973
out[0] = BOM_UTF8 + out[0]
1976
# Turn the list to a string, joined with correct newlines
1977
output = (self._a_to_u(self.newlines or os.linesep)
1980
output = output.encode(self.encoding)
1981
if (self.BOM and ((self.encoding is None) or
1982
(BOM_LIST.get(self.encoding.lower()) == 'utf_8'))):
1984
output = BOM_UTF8 + output
1985
if outfile is not None:
1986
outfile.write(output)
1988
h = open(self.filename, 'wb')
1992
def validate(self, validator, preserve_errors=False, copy=False,
1995
Test the ConfigObj against a configspec.
1997
It uses the ``validator`` object from *validate.py*.
1999
To run ``validate`` on the current ConfigObj, call: ::
2001
test = config.validate(validator)
2003
(Normally having previously passed in the configspec when the ConfigObj
2004
was created - you can dynamically assign a dictionary of checks to the
2005
``configspec`` attribute of a section though).
2007
It returns ``True`` if everything passes, or a dictionary of
2008
pass/fails (True/False). If every member of a subsection passes, it
2009
will just have the value ``True``. (It also returns ``False`` if all
2012
In addition, it converts the values from strings to their native
2013
types if their checks pass (and ``stringify`` is set).
2015
If ``preserve_errors`` is ``True`` (``False`` is default) then instead
2016
of a marking a fail with a ``False``, it will preserve the actual
2017
exception object. This can contain info about the reason for failure.
2018
For example the ``VdtValueTooSmallError`` indeicates that the value
2019
supplied was too small. If a value (or section) is missing it will
2020
still be marked as ``False``.
2022
You must have the validate module to use ``preserve_errors=True``.
2024
You can then use the ``flatten_errors`` function to turn your nested
2025
results dictionary into a flattened list of failures - useful for
2026
displaying meaningful error messages.
2029
if self.configspec is None:
2030
raise ValueError, 'No configspec supplied.'
2032
if VdtMissingValue is None:
2033
raise ImportError('Missing validate module.')
2036
spec_section = section.configspec
2037
if copy and hasattr(section, '_configspec_initial_comment'):
2038
section.initial_comment = section._configspec_initial_comment
2039
section.final_comment = section._configspec_final_comment
2040
section.encoding = section._configspec_encoding
2041
section.BOM = section._configspec_BOM
2042
section.newlines = section._configspec_newlines
2043
section.indent_type = section._configspec_indent_type
2044
if '__many__' in section.configspec:
2045
many = spec_section['__many__']
2046
# dynamically assign the configspecs
2047
# for the sections below
2048
for entry in section.sections:
2049
self._handle_repeat(section[entry], many)
2054
order = [k for k in section._order if k in spec_section]
2055
order += [k for k in spec_section if k not in order]
2057
if entry == '__many__':
2059
if (not entry in section.scalars) or (entry in section.defaults):
2061
# or entries from defaults
2064
if copy and not entry in section.scalars:
2066
section.comments[entry] = (
2067
section._configspec_comments.get(entry, []))
2068
section.inline_comments[entry] = (
2069
section._configspec_inline_comments.get(entry, ''))
2073
val = section[entry]
2075
check = validator.check(spec_section[entry],
2079
except validator.baseErrorClass, e:
2080
if not preserve_errors or isinstance(e, VdtMissingValue):
2083
# preserve the error
2090
if self.stringify or missing:
2091
# if we are doing type conversion
2092
# or the value is a supplied default
2093
if not self.stringify:
2094
if isinstance(check, (list, tuple)):
2096
check = [self._str(item) for item in check]
2097
elif missing and check is None:
2098
# convert the None from a default to a ''
2101
check = self._str(check)
2102
if (check != val) or missing:
2103
section[entry] = check
2104
if not copy and missing and entry not in section.defaults:
2105
section.defaults.append(entry)
2107
# Missing sections will have been created as empty ones when the
2108
# configspec was read.
2109
for entry in section.sections:
2110
# FIXME: this means DEFAULT is not copied in copy mode
2111
if section is self and entry == 'DEFAULT':
2114
section.comments[entry] = section._cs_section_comments[entry]
2115
section.inline_comments[entry] = (
2116
section._cs_section_inline_comments[entry])
2117
check = self.validate(validator, preserve_errors=preserve_errors,
2118
copy=copy, section=section[entry])
2135
class SimpleVal(object):
2138
Can be used to check that all members expected are present.
2140
To use it, provide a configspec with all your members in (the value given
2141
will be ignored). Pass an instance of ``SimpleVal`` to the ``validate``
2142
method of your ``ConfigObj``. ``validate`` will return ``True`` if all
2143
members are present, or a dictionary with True/False meaning
2144
present/missing. (Whole missing sections will be replaced with ``False``)
2148
self.baseErrorClass = ConfigObjError
2150
def check(self, check, member, missing=False):
2151
"""A dummy check method, always returns the value unchanged."""
2153
raise self.baseErrorClass
2156
# Check / processing functions for options
2157
def flatten_errors(cfg, res, levels=None, results=None):
2159
An example function that will turn a nested dictionary of results
2160
(as returned by ``ConfigObj.validate``) into a flat list.
2162
``cfg`` is the ConfigObj instance being checked, ``res`` is the results
2163
dictionary returned by ``validate``.
2165
(This is a recursive function, so you shouldn't use the ``levels`` or
2166
``results`` arguments - they are used by the function.
2168
Returns a list of keys that failed. Each member of the list is a tuple :
2171
([list of sections...], key, result)
2173
If ``validate`` was called with ``preserve_errors=False`` (the default)
2174
then ``result`` will always be ``False``.
2176
*list of sections* is a flattened list of sections that the key was found
2179
If the section was missing then key will be ``None``.
2181
If the value (or section) was missing then ``result`` will be ``False``.
2183
If ``validate`` was called with ``preserve_errors=True`` and a value
2184
was present, but failed the check, then ``result`` will be the exception
2185
object returned. You can use this as a string that describes the failure.
2187
For example *The value "3" is of the wrong type*.
2190
>>> vtor = validate.Validator()
2196
... another_option = Probably
2198
... another_option = True
2205
... option1 = boolean()
2206
... option2 = boolean()
2207
... option3 = boolean(default=Bad_value)
2209
... option1 = boolean()
2210
... option2 = boolean()
2211
... option3 = boolean(default=Bad_value)
2213
... another_option = boolean()
2215
... another_option = boolean()
2218
... value2 = integer
2219
... value3 = integer(0, 10)
2220
... [[[section3b-sub]]]
2223
... another_option = boolean()
2225
>>> cs = my_cfg.split('\\n')
2226
>>> ini = my_ini.split('\\n')
2227
>>> cfg = ConfigObj(ini, configspec=cs)
2228
>>> res = cfg.validate(vtor, preserve_errors=True)
2230
>>> for entry in flatten_errors(cfg, res):
2231
... section_list, key, error = entry
2232
... section_list.insert(0, '[root]')
2233
... if key is not None:
2234
... section_list.append(key)
2236
... section_list.append('[missing]')
2237
... section_string = ', '.join(section_list)
2238
... errors.append((section_string, ' = ', error))
2240
>>> for entry in errors:
2241
... print entry[0], entry[1], (entry[2] or 0)
2243
[root], option3 = the value "Bad_value" is of the wrong type.
2244
[root], section1, option2 = 0
2245
[root], section1, option3 = the value "Bad_value" is of the wrong type.
2246
[root], section2, another_option = the value "Probably" is of the wrong type.
2247
[root], section3, section3b, section3b-sub, [missing] = 0
2248
[root], section3, section3b, value2 = the value "a" is of the wrong type.
2249
[root], section3, section3b, value3 = the value "11" is too big.
2250
[root], section4, [missing] = 0
2259
results.append((levels[:], None, False))
2263
for (key, val) in res.items():
2266
if isinstance(cfg.get(key), dict):
2269
flatten_errors(cfg[key], val, levels, results)
2271
results.append((levels[:], key, val))
2279
"""*A programming language is a medium of expression.* - Paul Graham"""
added
removed
config/configobj.py
