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| author | Georg Brandl <georg@python.org> | 2011-09-04 06:35:54 (GMT) |
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| committer | Georg Brandl <georg@python.org> | 2011-09-04 06:35:54 (GMT) |
| commit | 3484a8771c7e4f8da65960d32c25071432f8afd3 (patch) | |
| tree | ea586dacd5e2ed1315932d6a645383de30d70237 /Doc/library | |
| parent | e3bb2cfb7ad8325dbf98312592221efc6e7625f2 (diff) | |
| parent | d42b7a332c40a54d1fe0a9b8a5b9f8d419c6bb90 (diff) | |
| download | cpython-3484a8771c7e4f8da65960d32c25071432f8afd3.zip cpython-3484a8771c7e4f8da65960d32c25071432f8afd3.tar.gz cpython-3484a8771c7e4f8da65960d32c25071432f8afd3.tar.bz2 | |
Merge with release clone.
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/sys.rst | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index 7d631f4..7f3d827 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -699,26 +699,36 @@ always available. This string contains a platform identifier that can be used to append platform-specific components to :data:`sys.path`, for instance. - For Unix systems, this is the lowercased OS name as returned by ``uname -s`` - with the first part of the version as returned by ``uname -r`` appended, - e.g. ``'sunos5'`` or ``'linux2'``, *at the time when Python was built*. - Unless you want to test for a specific system version, it is therefore - recommended to use the following idiom:: - - if sys.platform.startswith('linux'): + For most Unix systems, this is the lowercased OS name as returned by ``uname + -s`` with the first part of the version as returned by ``uname -r`` appended, + e.g. ``'sunos5'``, *at the time when Python was built*. Unless you want to + test for a specific system version, it is therefore recommended to use the + following idiom:: + + if sys.platform.startswith('freebsd'): + # FreeBSD-specific code here... + elif sys.platform.startswith('linux'): # Linux-specific code here... + .. versionchanged:: 3.2.2 + Since lots of code check for ``sys.platform == 'linux2'``, and there is + no essential change between Linux 2.x and 3.x, ``sys.platform`` is always + set to ``'linux2'``, even on Linux 3.x. In Python 3.3 and later, the + value will always be set to ``'linux'``, so it is recommended to always + use the ``startswith`` idiom presented above. + For other systems, the values are: - ================ =========================== - System :data:`platform` value - ================ =========================== - Windows ``'win32'`` - Windows/Cygwin ``'cygwin'`` - Mac OS X ``'darwin'`` - OS/2 ``'os2'`` - OS/2 EMX ``'os2emx'`` - ================ =========================== + ====================== =========================== + System :data:`platform` value + ====================== =========================== + Linux (2.x *and* 3.x) ``'linux2'`` + Windows ``'win32'`` + Windows/Cygwin ``'cygwin'`` + Mac OS X ``'darwin'`` + OS/2 ``'os2'`` + OS/2 EMX ``'os2emx'`` + ====================== =========================== .. seealso:: :attr:`os.name` has a coarser granularity. :func:`os.uname` gives |