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![Christian Heimes](/assets/img/avatar_default.png)
svn+ssh://pythondev@svn.python.org/python/trunk ........ r60965 | eric.smith | 2008-02-22 18:43:17 +0100 (Fri, 22 Feb 2008) | 1 line Tests for bin() builtin. These need to get merged into py3k, which has no tests for bin. ........ r60968 | raymond.hettinger | 2008-02-22 20:50:06 +0100 (Fri, 22 Feb 2008) | 1 line Document itertools.product(). ........ r60969 | raymond.hettinger | 2008-02-23 03:20:41 +0100 (Sat, 23 Feb 2008) | 9 lines Improve the implementation of itertools.product() * Fix-up issues pointed-out by Neal Norwitz. * Add extensive comments. * The lz->result variable is now a tuple instead of a list. * Use fast macro getitem/setitem calls so most code is in-line. * Re-use the result tuple if available (modify in-place instead of copy). ........ r60972 | raymond.hettinger | 2008-02-23 05:03:50 +0100 (Sat, 23 Feb 2008) | 1 line Add more comments ........ r60973 | raymond.hettinger | 2008-02-23 11:04:15 +0100 (Sat, 23 Feb 2008) | 1 line Add recipe using itertools.product(). ........ r60974 | facundo.batista | 2008-02-23 13:01:13 +0100 (Sat, 23 Feb 2008) | 6 lines Issue 1881. Increased the stack limit from 500 to 1500. Also added a test for this (and because of this test you'll see in stderr a message that parser.c sends before raising MemoryError). Thanks Ralf Schmitt. ........ r60975 | facundo.batista | 2008-02-23 13:27:17 +0100 (Sat, 23 Feb 2008) | 4 lines Issue 1776581. Minor corrections to smtplib, and two small tests. Thanks Alan McIntyre. ........ r60976 | facundo.batista | 2008-02-23 13:46:10 +0100 (Sat, 23 Feb 2008) | 5 lines Issue 1781. Now ConfigParser.add_section does not let you add a DEFAULT section any more, because it duplicated sections with the rest of the machinery. Thanks Tim Lesher and Manuel Kaufmann. ........
670 lines
24 KiB
Python
670 lines
24 KiB
Python
"""Configuration file parser.
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A setup file consists of sections, lead by a "[section]" header,
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and followed by "name: value" entries, with continuations and such in
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the style of RFC 822.
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The option values can contain format strings which refer to other values in
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the same section, or values in a special [DEFAULT] section.
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For example:
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something: %(dir)s/whatever
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would resolve the "%(dir)s" to the value of dir. All reference
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expansions are done late, on demand.
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Intrinsic defaults can be specified by passing them into the
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ConfigParser constructor as a dictionary.
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class:
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ConfigParser -- responsible for parsing a list of
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configuration files, and managing the parsed database.
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methods:
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__init__(defaults=None)
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create the parser and specify a dictionary of intrinsic defaults. The
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keys must be strings, the values must be appropriate for %()s string
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interpolation. Note that `__name__' is always an intrinsic default;
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its value is the section's name.
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sections()
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return all the configuration section names, sans DEFAULT
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has_section(section)
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return whether the given section exists
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has_option(section, option)
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return whether the given option exists in the given section
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options(section)
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return list of configuration options for the named section
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read(filenames)
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read and parse the list of named configuration files, given by
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name. A single filename is also allowed. Non-existing files
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are ignored. Return list of successfully read files.
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readfp(fp, filename=None)
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read and parse one configuration file, given as a file object.
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The filename defaults to fp.name; it is only used in error
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messages (if fp has no `name' attribute, the string `<???>' is used).
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get(section, option, raw=False, vars=None)
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return a string value for the named option. All % interpolations are
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expanded in the return values, based on the defaults passed into the
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constructor and the DEFAULT section. Additional substitutions may be
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provided using the `vars' argument, which must be a dictionary whose
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contents override any pre-existing defaults.
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getint(section, options)
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like get(), but convert value to an integer
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getfloat(section, options)
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like get(), but convert value to a float
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getboolean(section, options)
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like get(), but convert value to a boolean (currently case
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insensitively defined as 0, false, no, off for False, and 1, true,
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yes, on for True). Returns False or True.
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items(section, raw=False, vars=None)
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return a list of tuples with (name, value) for each option
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in the section.
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remove_section(section)
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remove the given file section and all its options
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remove_option(section, option)
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remove the given option from the given section
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set(section, option, value)
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set the given option
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write(fp)
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write the configuration state in .ini format
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"""
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import re
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__all__ = ["NoSectionError", "DuplicateSectionError", "NoOptionError",
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"InterpolationError", "InterpolationDepthError",
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"InterpolationSyntaxError", "ParsingError",
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"MissingSectionHeaderError",
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"ConfigParser", "SafeConfigParser", "RawConfigParser",
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"DEFAULTSECT", "MAX_INTERPOLATION_DEPTH"]
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DEFAULTSECT = "DEFAULT"
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MAX_INTERPOLATION_DEPTH = 10
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# exception classes
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class Error(Exception):
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"""Base class for ConfigParser exceptions."""
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def _get_message(self):
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"""Getter for 'message'; needed only to override deprecation in
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BaseException."""
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return self.__message
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def _set_message(self, value):
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"""Setter for 'message'; needed only to override deprecation in
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BaseException."""
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self.__message = value
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# BaseException.message has been deprecated since Python 2.6. To prevent
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# DeprecationWarning from popping up over this pre-existing attribute, use
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# a new property that takes lookup precedence.
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message = property(_get_message, _set_message)
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def __init__(self, msg=''):
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self.message = msg
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Exception.__init__(self, msg)
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def __repr__(self):
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return self.message
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__str__ = __repr__
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class NoSectionError(Error):
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"""Raised when no section matches a requested option."""
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def __init__(self, section):
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Error.__init__(self, 'No section: %r' % (section,))
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self.section = section
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class DuplicateSectionError(Error):
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"""Raised when a section is multiply-created."""
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def __init__(self, section):
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Error.__init__(self, "Section %r already exists" % section)
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self.section = section
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class NoOptionError(Error):
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"""A requested option was not found."""
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def __init__(self, option, section):
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Error.__init__(self, "No option %r in section: %r" %
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(option, section))
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self.option = option
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self.section = section
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class InterpolationError(Error):
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"""Base class for interpolation-related exceptions."""
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def __init__(self, option, section, msg):
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Error.__init__(self, msg)
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self.option = option
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self.section = section
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class InterpolationMissingOptionError(InterpolationError):
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"""A string substitution required a setting which was not available."""
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def __init__(self, option, section, rawval, reference):
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msg = ("Bad value substitution:\n"
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"\tsection: [%s]\n"
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"\toption : %s\n"
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"\tkey : %s\n"
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"\trawval : %s\n"
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% (section, option, reference, rawval))
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InterpolationError.__init__(self, option, section, msg)
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self.reference = reference
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class InterpolationSyntaxError(InterpolationError):
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"""Raised when the source text into which substitutions are made
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does not conform to the required syntax."""
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class InterpolationDepthError(InterpolationError):
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"""Raised when substitutions are nested too deeply."""
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def __init__(self, option, section, rawval):
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msg = ("Value interpolation too deeply recursive:\n"
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"\tsection: [%s]\n"
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"\toption : %s\n"
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"\trawval : %s\n"
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% (section, option, rawval))
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InterpolationError.__init__(self, option, section, msg)
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class ParsingError(Error):
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"""Raised when a configuration file does not follow legal syntax."""
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def __init__(self, filename):
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Error.__init__(self, 'File contains parsing errors: %s' % filename)
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self.filename = filename
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self.errors = []
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def append(self, lineno, line):
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self.errors.append((lineno, line))
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self.message += '\n\t[line %2d]: %s' % (lineno, line)
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class MissingSectionHeaderError(ParsingError):
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"""Raised when a key-value pair is found before any section header."""
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def __init__(self, filename, lineno, line):
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Error.__init__(
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self,
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'File contains no section headers.\nfile: %s, line: %d\n%r' %
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(filename, lineno, line))
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self.filename = filename
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self.lineno = lineno
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self.line = line
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class RawConfigParser:
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def __init__(self, defaults=None, dict_type=dict):
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self._dict = dict_type
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self._sections = self._dict()
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self._defaults = self._dict()
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if defaults:
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for key, value in defaults.items():
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self._defaults[self.optionxform(key)] = value
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def defaults(self):
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return self._defaults
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def sections(self):
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"""Return a list of section names, excluding [DEFAULT]"""
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# self._sections will never have [DEFAULT] in it
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return list(self._sections.keys())
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def add_section(self, section):
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"""Create a new section in the configuration.
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Raise DuplicateSectionError if a section by the specified name
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already exists. Raise ValueError if name is DEFAULT or any of it's
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case-insensitive variants.
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"""
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if section.lower() == "default":
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raise ValueError('Invalid section name: %s' % section)
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if section in self._sections:
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raise DuplicateSectionError(section)
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self._sections[section] = self._dict()
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def has_section(self, section):
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"""Indicate whether the named section is present in the configuration.
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The DEFAULT section is not acknowledged.
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"""
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return section in self._sections
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def options(self, section):
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"""Return a list of option names for the given section name."""
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try:
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opts = self._sections[section].copy()
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except KeyError:
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raise NoSectionError(section)
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opts.update(self._defaults)
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if '__name__' in opts:
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del opts['__name__']
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return list(opts.keys())
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def read(self, filenames):
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"""Read and parse a filename or a list of filenames.
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Files that cannot be opened are silently ignored; this is
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designed so that you can specify a list of potential
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configuration file locations (e.g. current directory, user's
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home directory, systemwide directory), and all existing
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configuration files in the list will be read. A single
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filename may also be given.
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Return list of successfully read files.
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"""
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if isinstance(filenames, str):
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filenames = [filenames]
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read_ok = []
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for filename in filenames:
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try:
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fp = open(filename)
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except IOError:
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continue
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self._read(fp, filename)
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fp.close()
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read_ok.append(filename)
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return read_ok
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def readfp(self, fp, filename=None):
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"""Like read() but the argument must be a file-like object.
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The `fp' argument must have a `readline' method. Optional
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second argument is the `filename', which if not given, is
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taken from fp.name. If fp has no `name' attribute, `<???>' is
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used.
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"""
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if filename is None:
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try:
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filename = fp.name
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except AttributeError:
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filename = '<???>'
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self._read(fp, filename)
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def get(self, section, option):
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opt = self.optionxform(option)
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if section not in self._sections:
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if section != DEFAULTSECT:
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raise NoSectionError(section)
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if opt in self._defaults:
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return self._defaults[opt]
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else:
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raise NoOptionError(option, section)
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elif opt in self._sections[section]:
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return self._sections[section][opt]
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elif opt in self._defaults:
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return self._defaults[opt]
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else:
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raise NoOptionError(option, section)
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def items(self, section):
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try:
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d2 = self._sections[section]
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except KeyError:
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if section != DEFAULTSECT:
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raise NoSectionError(section)
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d2 = self._dict()
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d = self._defaults.copy()
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d.update(d2)
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if "__name__" in d:
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del d["__name__"]
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return d.items()
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def _get(self, section, conv, option):
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return conv(self.get(section, option))
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def getint(self, section, option):
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return self._get(section, int, option)
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def getfloat(self, section, option):
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return self._get(section, float, option)
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_boolean_states = {'1': True, 'yes': True, 'true': True, 'on': True,
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'0': False, 'no': False, 'false': False, 'off': False}
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def getboolean(self, section, option):
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v = self.get(section, option)
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if v.lower() not in self._boolean_states:
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raise ValueError('Not a boolean: %s' % v)
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return self._boolean_states[v.lower()]
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def optionxform(self, optionstr):
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return optionstr.lower()
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def has_option(self, section, option):
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"""Check for the existence of a given option in a given section."""
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if not section or section == DEFAULTSECT:
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option = self.optionxform(option)
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return option in self._defaults
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elif section not in self._sections:
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return False
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else:
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option = self.optionxform(option)
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return (option in self._sections[section]
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or option in self._defaults)
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def set(self, section, option, value):
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"""Set an option."""
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if not section or section == DEFAULTSECT:
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sectdict = self._defaults
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else:
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try:
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sectdict = self._sections[section]
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except KeyError:
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raise NoSectionError(section)
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sectdict[self.optionxform(option)] = value
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def write(self, fp):
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"""Write an .ini-format representation of the configuration state."""
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if self._defaults:
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fp.write("[%s]\n" % DEFAULTSECT)
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for (key, value) in self._defaults.items():
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fp.write("%s = %s\n" % (key, str(value).replace('\n', '\n\t')))
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fp.write("\n")
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for section in self._sections:
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fp.write("[%s]\n" % section)
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for (key, value) in self._sections[section].items():
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if key != "__name__":
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fp.write("%s = %s\n" %
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(key, str(value).replace('\n', '\n\t')))
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fp.write("\n")
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def remove_option(self, section, option):
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"""Remove an option."""
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if not section or section == DEFAULTSECT:
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sectdict = self._defaults
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else:
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try:
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sectdict = self._sections[section]
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except KeyError:
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raise NoSectionError(section)
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option = self.optionxform(option)
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existed = option in sectdict
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if existed:
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del sectdict[option]
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return existed
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def remove_section(self, section):
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"""Remove a file section."""
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existed = section in self._sections
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if existed:
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del self._sections[section]
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return existed
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#
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# Regular expressions for parsing section headers and options.
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#
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SECTCRE = re.compile(
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r'\[' # [
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r'(?P<header>[^]]+)' # very permissive!
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r'\]' # ]
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)
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OPTCRE = re.compile(
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r'(?P<option>[^:=\s][^:=]*)' # very permissive!
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r'\s*(?P<vi>[:=])\s*' # any number of space/tab,
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# followed by separator
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# (either : or =), followed
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# by any # space/tab
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r'(?P<value>.*)$' # everything up to eol
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)
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def _read(self, fp, fpname):
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"""Parse a sectioned setup file.
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The sections in setup file contains a title line at the top,
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indicated by a name in square brackets (`[]'), plus key/value
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options lines, indicated by `name: value' format lines.
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Continuations are represented by an embedded newline then
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leading whitespace. Blank lines, lines beginning with a '#',
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and just about everything else are ignored.
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"""
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cursect = None # None, or a dictionary
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optname = None
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lineno = 0
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e = None # None, or an exception
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while True:
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line = fp.readline()
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if not line:
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break
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lineno = lineno + 1
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# comment or blank line?
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if line.strip() == '' or line[0] in '#;':
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continue
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if line.split(None, 1)[0].lower() == 'rem' and line[0] in "rR":
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# no leading whitespace
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continue
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# continuation line?
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if line[0].isspace() and cursect is not None and optname:
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value = line.strip()
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if value:
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cursect[optname] = "%s\n%s" % (cursect[optname], value)
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# a section header or option header?
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else:
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# is it a section header?
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mo = self.SECTCRE.match(line)
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if mo:
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sectname = mo.group('header')
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if sectname in self._sections:
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cursect = self._sections[sectname]
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elif sectname == DEFAULTSECT:
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cursect = self._defaults
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else:
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cursect = self._dict()
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cursect['__name__'] = sectname
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self._sections[sectname] = cursect
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# So sections can't start with a continuation line
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optname = None
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# no section header in the file?
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elif cursect is None:
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raise MissingSectionHeaderError(fpname, lineno, line)
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# an option line?
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else:
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mo = self.OPTCRE.match(line)
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if mo:
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optname, vi, optval = mo.group('option', 'vi', 'value')
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if vi in ('=', ':') and ';' in optval:
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# ';' is a comment delimiter only if it follows
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# a spacing character
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pos = optval.find(';')
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if pos != -1 and optval[pos-1].isspace():
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optval = optval[:pos]
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optval = optval.strip()
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# allow empty values
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if optval == '""':
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optval = ''
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optname = self.optionxform(optname.rstrip())
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cursect[optname] = optval
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else:
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# a non-fatal parsing error occurred. set up the
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# exception but keep going. the exception will be
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# raised at the end of the file and will contain a
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# list of all bogus lines
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if not e:
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e = ParsingError(fpname)
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e.append(lineno, repr(line))
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# if any parsing errors occurred, raise an exception
|
|
if e:
|
|
raise e
|
|
|
|
|
|
class ConfigParser(RawConfigParser):
|
|
|
|
def get(self, section, option, raw=False, vars=None):
|
|
"""Get an option value for a given section.
|
|
|
|
All % interpolations are expanded in the return values, based on the
|
|
defaults passed into the constructor, unless the optional argument
|
|
`raw' is true. Additional substitutions may be provided using the
|
|
`vars' argument, which must be a dictionary whose contents overrides
|
|
any pre-existing defaults.
|
|
|
|
The section DEFAULT is special.
|
|
"""
|
|
d = self._defaults.copy()
|
|
try:
|
|
d.update(self._sections[section])
|
|
except KeyError:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
# Update with the entry specific variables
|
|
if vars:
|
|
for key, value in vars.items():
|
|
d[self.optionxform(key)] = value
|
|
option = self.optionxform(option)
|
|
try:
|
|
value = d[option]
|
|
except KeyError:
|
|
raise NoOptionError(option, section)
|
|
|
|
if raw:
|
|
return value
|
|
else:
|
|
return self._interpolate(section, option, value, d)
|
|
|
|
def items(self, section, raw=False, vars=None):
|
|
"""Return a list of tuples with (name, value) for each option
|
|
in the section.
|
|
|
|
All % interpolations are expanded in the return values, based on the
|
|
defaults passed into the constructor, unless the optional argument
|
|
`raw' is true. Additional substitutions may be provided using the
|
|
`vars' argument, which must be a dictionary whose contents overrides
|
|
any pre-existing defaults.
|
|
|
|
The section DEFAULT is special.
|
|
"""
|
|
d = self._defaults.copy()
|
|
try:
|
|
d.update(self._sections[section])
|
|
except KeyError:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
# Update with the entry specific variables
|
|
if vars:
|
|
for key, value in vars.items():
|
|
d[self.optionxform(key)] = value
|
|
options = list(d.keys())
|
|
if "__name__" in options:
|
|
options.remove("__name__")
|
|
if raw:
|
|
return [(option, d[option])
|
|
for option in options]
|
|
else:
|
|
return [(option, self._interpolate(section, option, d[option], d))
|
|
for option in options]
|
|
|
|
def _interpolate(self, section, option, rawval, vars):
|
|
# do the string interpolation
|
|
value = rawval
|
|
depth = MAX_INTERPOLATION_DEPTH
|
|
while depth: # Loop through this until it's done
|
|
depth -= 1
|
|
if "%(" in value:
|
|
value = self._KEYCRE.sub(self._interpolation_replace, value)
|
|
try:
|
|
value = value % vars
|
|
except KeyError as e:
|
|
raise InterpolationMissingOptionError(
|
|
option, section, rawval, e.args[0])
|
|
else:
|
|
break
|
|
if "%(" in value:
|
|
raise InterpolationDepthError(option, section, rawval)
|
|
return value
|
|
|
|
_KEYCRE = re.compile(r"%\(([^)]*)\)s|.")
|
|
|
|
def _interpolation_replace(self, match):
|
|
s = match.group(1)
|
|
if s is None:
|
|
return match.group()
|
|
else:
|
|
return "%%(%s)s" % self.optionxform(s)
|
|
|
|
|
|
class SafeConfigParser(ConfigParser):
|
|
|
|
def _interpolate(self, section, option, rawval, vars):
|
|
# do the string interpolation
|
|
L = []
|
|
self._interpolate_some(option, L, rawval, section, vars, 1)
|
|
return ''.join(L)
|
|
|
|
_interpvar_re = re.compile(r"%\(([^)]+)\)s")
|
|
_badpercent_re = re.compile(r"%[^%]|%$")
|
|
|
|
def _interpolate_some(self, option, accum, rest, section, map, depth):
|
|
if depth > MAX_INTERPOLATION_DEPTH:
|
|
raise InterpolationDepthError(option, section, rest)
|
|
while rest:
|
|
p = rest.find("%")
|
|
if p < 0:
|
|
accum.append(rest)
|
|
return
|
|
if p > 0:
|
|
accum.append(rest[:p])
|
|
rest = rest[p:]
|
|
# p is no longer used
|
|
c = rest[1:2]
|
|
if c == "%":
|
|
accum.append("%")
|
|
rest = rest[2:]
|
|
elif c == "(":
|
|
m = self._interpvar_re.match(rest)
|
|
if m is None:
|
|
raise InterpolationSyntaxError(option, section,
|
|
"bad interpolation variable reference %r" % rest)
|
|
var = self.optionxform(m.group(1))
|
|
rest = rest[m.end():]
|
|
try:
|
|
v = map[var]
|
|
except KeyError:
|
|
raise InterpolationMissingOptionError(
|
|
option, section, rest, var)
|
|
if "%" in v:
|
|
self._interpolate_some(option, accum, v,
|
|
section, map, depth + 1)
|
|
else:
|
|
accum.append(v)
|
|
else:
|
|
raise InterpolationSyntaxError(
|
|
option, section,
|
|
"'%%' must be followed by '%%' or '(', found: %r" % (rest,))
|
|
|
|
def set(self, section, option, value):
|
|
"""Set an option. Extend ConfigParser.set: check for string values."""
|
|
if not isinstance(value, str):
|
|
raise TypeError("option values must be strings")
|
|
# check for bad percent signs:
|
|
# first, replace all "good" interpolations
|
|
tmp_value = self._interpvar_re.sub('', value)
|
|
# then, check if there's a lone percent sign left
|
|
m = self._badpercent_re.search(tmp_value)
|
|
if m:
|
|
raise ValueError("invalid interpolation syntax in %r at "
|
|
"position %d" % (value, m.start()))
|
|
ConfigParser.set(self, section, option, value)
|