1999-01-26 11:47:59 -04:00
|
|
|
\section{\module{ConfigParser} ---
|
1999-04-21 13:41:40 -03:00
|
|
|
Configuration file parser}
|
1999-01-26 11:47:59 -04:00
|
|
|
|
|
|
|
\declaremodule{standard}{ConfigParser}
|
|
|
|
\modulesynopsis{Configuration file parser.}
|
2000-04-03 17:13:55 -03:00
|
|
|
\moduleauthor{Ken Manheimer}{klm@digicool.com}
|
|
|
|
\moduleauthor{Barry Warsaw}{bwarsaw@python.org}
|
2000-07-10 15:11:00 -03:00
|
|
|
\moduleauthor{Eric S. Raymond}{esr@thyrsus.com}
|
1999-01-26 11:47:59 -04:00
|
|
|
\sectionauthor{Christopher G. Petrilli}{petrilli@amber.org}
|
|
|
|
|
1999-06-15 14:30:59 -03:00
|
|
|
This module defines the class \class{ConfigParser}.
|
|
|
|
\indexii{.ini}{file}\indexii{configuration}{file}\index{ini file}
|
|
|
|
\index{Windows ini file}
|
|
|
|
The \class{ConfigParser} class implements a basic configuration file
|
1999-01-26 11:47:59 -04:00
|
|
|
parser language which provides a structure similar to what you would
|
1999-06-15 14:30:59 -03:00
|
|
|
find on Microsoft Windows INI files. You can use this to write Python
|
1999-01-26 11:47:59 -04:00
|
|
|
programs which can be customized by end users easily.
|
|
|
|
|
|
|
|
The configuration file consists of sections, lead by a
|
|
|
|
\samp{[section]} header and followed by \samp{name: value} entries,
|
1999-06-15 14:30:59 -03:00
|
|
|
with continuations in the style of \rfc{822}; \samp{name=value} is
|
2000-04-03 17:13:55 -03:00
|
|
|
also accepted. Note that leading whitespace is removed from values.
|
|
|
|
The optional values can contain format strings which refer to other
|
|
|
|
values in the same section, or values in a special
|
1999-06-15 14:30:59 -03:00
|
|
|
\code{DEFAULT} section. Additional defaults can be provided upon
|
2000-04-03 17:13:55 -03:00
|
|
|
initialization and retrieval. Lines beginning with \character{\#} or
|
|
|
|
\character{;} are ignored and may be used to provide comments.
|
1999-01-26 11:47:59 -04:00
|
|
|
|
|
|
|
For example:
|
|
|
|
|
|
|
|
\begin{verbatim}
|
|
|
|
foodir: %(dir)s/whatever
|
2000-04-03 17:13:55 -03:00
|
|
|
dir=frob
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{verbatim}
|
|
|
|
|
2000-04-03 17:13:55 -03:00
|
|
|
would resolve the \samp{\%(dir)s} to the value of
|
|
|
|
\samp{dir} (\samp{frob} in this case). All reference expansions are
|
|
|
|
done on demand.
|
1999-01-26 11:47:59 -04:00
|
|
|
|
2000-04-03 17:13:55 -03:00
|
|
|
Default values can be specified by passing them into the
|
|
|
|
\class{ConfigParser} constructor as a dictionary. Additional defaults
|
|
|
|
may be passed into the \method{get()} method which will override all
|
1999-01-26 17:49:05 -04:00
|
|
|
others.
|
1999-01-26 11:47:59 -04:00
|
|
|
|
|
|
|
\begin{classdesc}{ConfigParser}{\optional{defaults}}
|
|
|
|
Return a new instance of the \class{ConfigParser} class. When
|
2000-05-22 23:28:26 -03:00
|
|
|
\var{defaults} is given, it is initialized into the dictionary of
|
2000-12-06 20:03:24 -04:00
|
|
|
intrinsic defaults. The keys must be strings, and the values must be
|
1999-01-26 11:47:59 -04:00
|
|
|
appropriate for the \samp{\%()s} string interpolation. Note that
|
2000-09-27 19:48:44 -03:00
|
|
|
\var{__name__} is an intrinsic default; its value is the section name,
|
|
|
|
and will override any value provided in \var{defaults}.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{classdesc}
|
|
|
|
|
|
|
|
\begin{excdesc}{NoSectionError}
|
|
|
|
Exception raised when a specified section is not found.
|
|
|
|
\end{excdesc}
|
|
|
|
|
|
|
|
\begin{excdesc}{DuplicateSectionError}
|
2000-07-16 16:01:10 -03:00
|
|
|
Exception raised when multiple sections with the same name are found,
|
2000-04-03 17:13:55 -03:00
|
|
|
or if \method{add_section()} is called with the name of a section that
|
|
|
|
is already present.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{excdesc}
|
|
|
|
|
|
|
|
\begin{excdesc}{NoOptionError}
|
|
|
|
Exception raised when a specified option is not found in the specified
|
|
|
|
section.
|
|
|
|
\end{excdesc}
|
|
|
|
|
|
|
|
\begin{excdesc}{InterpolationError}
|
|
|
|
Exception raised when problems occur performing string interpolation.
|
|
|
|
\end{excdesc}
|
|
|
|
|
2000-09-27 19:48:44 -03:00
|
|
|
\begin{excdesc}{InterpolationDepthError}
|
|
|
|
Exception raised when string interpolation cannot be completed because
|
|
|
|
the number of iterations exceeds \constant{MAX_INTERPOLATION_DEPTH}.
|
|
|
|
\end{excdesc}
|
|
|
|
|
1999-01-26 11:47:59 -04:00
|
|
|
\begin{excdesc}{MissingSectionHeaderError}
|
|
|
|
Exception raised when attempting to parse a file which has no section
|
|
|
|
headers.
|
|
|
|
\end{excdesc}
|
|
|
|
|
|
|
|
\begin{excdesc}{ParsingError}
|
|
|
|
Exception raised when errors occur attempting to parse a file.
|
|
|
|
\end{excdesc}
|
|
|
|
|
2000-09-27 19:48:44 -03:00
|
|
|
\begin{datadesc}{MAX_INTERPOLATION_DEPTH}
|
|
|
|
The maximum depth for recursive interpolation for \method{get()} when
|
|
|
|
the \var{raw} parameter is false. Setting this does not change the
|
|
|
|
allowed recursion depth.
|
|
|
|
\end{datadesc}
|
|
|
|
|
1999-01-26 17:49:05 -04:00
|
|
|
|
1999-05-11 12:14:15 -03:00
|
|
|
\begin{seealso}
|
|
|
|
\seemodule{shlex}{Support for a creating \UNIX{} shell-like
|
|
|
|
minilanguages which can be used as an alternate format
|
|
|
|
for application configuration files.}
|
|
|
|
\end{seealso}
|
|
|
|
|
2001-02-19 18:37:24 -04:00
|
|
|
|
1999-01-26 11:47:59 -04:00
|
|
|
\subsection{ConfigParser Objects \label{ConfigParser-objects}}
|
|
|
|
|
|
|
|
\class{ConfigParser} instances have the following methods:
|
|
|
|
|
|
|
|
\begin{methoddesc}{defaults}{}
|
2000-05-22 23:28:26 -03:00
|
|
|
Return a dictionary containing the instance-wide defaults.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{sections}{}
|
2000-04-03 17:13:55 -03:00
|
|
|
Return a list of the sections available; \code{DEFAULT} is not
|
|
|
|
included in the list.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{add_section}{section}
|
|
|
|
Add a section named \var{section} to the instance. If a section by
|
|
|
|
the given name already exists, \exception{DuplicateSectionError} is
|
|
|
|
raised.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{has_section}{section}
|
|
|
|
Indicates whether the named section is present in the
|
|
|
|
configuration. The \code{DEFAULT} section is not acknowledged.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{options}{section}
|
|
|
|
Returns a list of options available in the specified \var{section}.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
2000-07-10 15:11:00 -03:00
|
|
|
\begin{methoddesc}{has_option}{section, option}
|
|
|
|
If the given section exists, and contains the given option. return 1;
|
|
|
|
otherwise return 0. (New in 1.6)
|
|
|
|
\end{methoddesc}
|
|
|
|
|
1999-01-26 11:47:59 -04:00
|
|
|
\begin{methoddesc}{read}{filenames}
|
2000-05-09 12:06:32 -03:00
|
|
|
Read and parse a list of filenames. If \var{filenames} is a string or
|
|
|
|
Unicode string, it is treated as a single filename.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{readfp}{fp\optional{, filename}}
|
|
|
|
Read and parse configuration data from the file or file-like object in
|
|
|
|
\var{fp} (only the \method{readline()} method is used). If
|
|
|
|
\var{filename} is omitted and \var{fp} has a \member{name} attribute,
|
|
|
|
that is used for \var{filename}; the default is \samp{<???>}.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{methoddesc}
|
|
|
|
|
1999-01-26 17:49:05 -04:00
|
|
|
\begin{methoddesc}{get}{section, option\optional{, raw\optional{, vars}}}
|
1999-01-26 11:47:59 -04:00
|
|
|
Get an \var{option} value for the provided \var{section}. All the
|
1999-04-21 13:41:40 -03:00
|
|
|
\character{\%} interpolations are expanded in the return values, based on
|
1999-01-26 17:49:05 -04:00
|
|
|
the defaults passed into the constructor, as well as the options
|
|
|
|
\var{vars} provided, unless the \var{raw} argument is true.
|
1999-01-26 11:47:59 -04:00
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{getint}{section, option}
|
|
|
|
A convenience method which coerces the \var{option} in the specified
|
|
|
|
\var{section} to an integer.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{getfloat}{section, option}
|
|
|
|
A convenience method which coerces the \var{option} in the specified
|
|
|
|
\var{section} to a floating point number.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{getboolean}{section, option}
|
|
|
|
A convenience method which coerces the \var{option} in the specified
|
|
|
|
\var{section} to a boolean value. Note that the only accepted values
|
2000-04-03 17:13:55 -03:00
|
|
|
for the option are \samp{0} and \samp{1}, any others will raise
|
1999-01-26 11:47:59 -04:00
|
|
|
\exception{ValueError}.
|
|
|
|
\end{methoddesc}
|
2000-07-10 15:11:00 -03:00
|
|
|
|
|
|
|
\begin{methoddesc}{set}{section, option, value}
|
|
|
|
If the given section exists, set the given option to the specified value;
|
|
|
|
otherwise raise \exception{NoSectionError}. (New in 1.6)
|
|
|
|
\end{methoddesc}
|
|
|
|
|
2000-07-14 12:00:02 -03:00
|
|
|
\begin{methoddesc}{write}{fileobject}
|
2000-07-10 15:11:00 -03:00
|
|
|
Write a representation of the configuration to the specified file
|
|
|
|
object. This representation can be parsed by a future \method{read()}
|
|
|
|
call. (New in 1.6)
|
|
|
|
\end{methoddesc}
|
2000-07-14 12:00:02 -03:00
|
|
|
|
|
|
|
\begin{methoddesc}{remove_option}{section, option}
|
|
|
|
Remove the specified \var{option} from the specified \var{section}.
|
|
|
|
If the section does not exist, raise \exception{NoSectionError}.
|
|
|
|
If the option existed to be removed, return 1; otherwise return 0.
|
|
|
|
(New in 1.6)
|
|
|
|
\end{methoddesc}
|
|
|
|
|
|
|
|
\begin{methoddesc}{remove_section}{section}
|
|
|
|
Remove the specified \var{section} from the configuration.
|
|
|
|
If the section in fact existed, return 1. Otherwise return 0.
|
|
|
|
\end{methoddesc}
|
|
|
|
|
2001-02-19 18:37:24 -04:00
|
|
|
\begin{methoddesc}{optionxform}{option}
|
|
|
|
Transforms the option name \var{option} as found in an input file or
|
|
|
|
as passed in by client code to the form that should be used in the
|
|
|
|
internal structures. The default implementation returns a lower-case
|
|
|
|
version of \var{option}; subclasses may override this or client code
|
|
|
|
can set an attribute of this name on instances to affect this
|
|
|
|
behavior. Setting this to \function{str()}, for example, would make
|
|
|
|
option names case sensitive.
|
|
|
|
\end{methoddesc}
|