sysconfig 模块提供了对 Python 配置信息的访问支持，比如安装路径列表和有关当前平台的配置变量。
pyconfig.h 头文件，这是构建 Python 二进制文件本身和用
distutils 编译的第三方 C 语言扩展所必需的。
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
>>> 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
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
Python currently supports six schemes:
posix_prefix: scheme for POSIX platforms like Linux or macOS. This is the default scheme used when Python or a component is installed.
posix_home: scheme for POSIX platforms used when a home option is used upon installation. This scheme is used when a component is installed through Distutils with a specific home prefix.
posix_user: scheme for POSIX platforms used when a component is installed through Distutils and the user option is used. This scheme defines paths located under the user home directory.
nt: scheme for NT platforms like Windows.
nt_user: scheme for NT platforms, when the user option is used.
osx_framework_user: scheme for macOS, when the user option is used.
Each scheme is itself composed of a series of paths and each path has a unique identifier. Python currently uses eight paths:
stdlib: directory containing the standard Python library files that are not platform-specific.
platstdlib: directory containing the standard Python library files that are platform-specific.
platlib: directory for site-specific, platform-specific files.
purelib: directory for site-specific, non-platform-specific files.
include: directory for non-platform-specific header files.
platinclude: directory for platform-specific header files.
scripts: directory for script files.
data: directory for data files.
sysconfig provides some functions to determine these paths.
Return a tuple containing all schemes currently supported in
Return the default scheme name for the current platform.
3.10 版更變: This function was previously named
_get_default_scheme()and considered an implementation detail.
Return a preferred scheme name for an installation layout specified by key.
key must be either
Return a dict containing preferred scheme names on the current platform. Python implementers and redistributors may add their preferred schemes to the
_INSTALL_SCHEMESmodule-level global value, and modify this function to return those scheme names, to e.g. provide different schemes for system and language package managers to use, so packages installed by either do not mix with those by the other.
Return a tuple containing all path names currently supported in
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
sysconfigstores 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, raise a
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.MINORPython 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., on Linux, the kernel version isn't particularly important.
win-amd64 (在 AMD64, aka x86_64, Intel64, 和 EM64T上的64位 Windows )
win32 (all others - specifically, sys.platform is returned)
macOS can return:
对于其他非-POSIX 平台， 目前只是返回
Trueif 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 installor 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.
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" ...