New in version 3.2.
Source code: Lib/sysconfig.py
sysconfig module provides access to Python’s configuration information like the list of installation paths and the configuration variables relevant for the current platform.
A Python distribution contains a
Makefile and a
pyconfig.h header file that are necessary to build both the Python binary itself and third-party C extensions compiled using
Notice that on Windows, it’s a much smaller set.
With no arguments, return a dictionary of all configuration variables relevant for the current platform.
With arguments, return a list of values that result from looking up each argument in the configuration variable dictionary.
For each argument, if the value is not found, return
Return the value of a single variable name. Equivalent to
If name is not found, return
Example of usage:
>>> import sysconfig >>> sysconfig.get_config_var('Py_ENABLE_SHARED') 0 >>> sysconfig.get_config_var('LIBDIR') '/usr/local/lib' >>> sysconfig.get_config_vars('AR', 'CXX') ['ar', 'g++']
Python uses an installation scheme that differs depending on the platform and on the installation options. These schemes are stored in
sysconfig under unique identifiers based on the value returned by
Every new component that is installed using
distutils or a Distutils-based system will follow the same scheme to copy its file in the right places.
Python currently supports seven schemes:
Each scheme is itself composed of a series of paths and each path has a unique identifier. Python currently uses eight paths:
sysconfig provides some functions to determine these paths.
Return a tuple containing all schemes currently supported in
Return a tuple containing all path names currently supported in
sysconfig.get_path(name[, scheme[, vars[, expand]]])
Return an installation path corresponding to the path name, from the install scheme named scheme.
name has to be a value from the list returned by
sysconfig stores installation paths corresponding to each path name, for each platform, with variables to be expanded. For instance the stdlib path for the nt scheme is:
If scheme is provided, it must be a value from the list returned by
get_scheme_names(). Otherwise, the default scheme for the current platform is used.
If vars is provided, it must be a dictionary of variables that will update the dictionary return by
If expand is set to
False, the path will not be expanded using the variables.
If name is not found, return
sysconfig.get_paths([scheme[, vars[, expand]]])
Return a dictionary containing all installation paths corresponding to an installation scheme. See
get_path() for more information.
If scheme is not provided, will use the default scheme for the current platform.
If vars is provided, it must be a dictionary of variables that will update the dictionary used to expand the paths.
If expand is set to false, the paths will not be expanded.
MAJOR.MINOR Python version number as a string. Similar to
'%d.%d' % sys.version_info[:2].
Return a string that identifies the current platform.
This is used mainly to distinguish platform-specific build directories and platform-specific built distributions. Typically includes the OS name and version and the architecture (as supplied by
os.uname()), although the exact information included depends on the OS; e.g. for IRIX the architecture isn’t particularly important (IRIX only runs on SGI hardware), but for Linux the kernel version isn’t particularly important.
Examples of returned values:
Windows will return one of:
Mac OS X can return:
For other non-POSIX platforms, currently just returns
True if the running Python interpreter was built from source and is being run from its built location, and not from a location resulting from e.g. running
make install or installing via a binary installer.
fp is a file-like object pointing to the
A dictionary containing name/value pairs is returned. If an optional dictionary is passed in as the second argument, it is used instead of a new dictionary, and updated with the values read in the file.
Return the path of
Return the path of
You can use
sysconfig as a script with Python’s -m option:
$ python -m sysconfig Platform: "macosx-10.4-i386" Python version: "3.2" Current installation scheme: "posix_prefix" Paths: data = "/usr/local" include = "/Users/tarek/Dev/svn.python.org/py3k/Include" platinclude = "." platlib = "/usr/local/lib/python3.2/site-packages" platstdlib = "/usr/local/lib/python3.2" purelib = "/usr/local/lib/python3.2/site-packages" scripts = "/usr/local/bin" stdlib = "/usr/local/lib/python3.2" Variables: AC_APPLE_UNIVERSAL_BUILD = "0" AIX_GENUINE_CPLUSPLUS = "0" AR = "ar" ARFLAGS = "rc" ...
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