更新：在 Python 2.6+上
，使用
ctypes.get_errno()。
Python 2.5
下面的代码不可靠（或全面，有多种方法
errno可以定义），但它应该可以帮助您入门（或重新考虑您在小型扩展模块上的位置（毕竟在Debian上，
pythonsetup.py install或者
easy_install在构建它时应该没有问题）） 。来自
http://prespeak.net/pypy/dist/pypy/rpython/lltypesystem/ll2ctypes.py
if not hasattr(ctypes, 'get_errno'): # Python 2.5 or older if sys.platform == 'win32': standard_c_lib._errno.restype = ctypes.POINTER(ctypes.c_int) def _where_is_errno(): return standard_c_lib._errno() elif sys.platform in ('linux2', 'freebsd6'): standard_c_lib.__errno_location.restype = ctypes.POINTER(ctypes.c_int) def _where_is_errno(): return standard_c_lib.__errno_location() elif sys.platform in ('darwin', 'freebsd7'): standard_c_lib.__error.restype = ctypes.POINTER(ctypes.c_int) def _where_is_errno(): return standard_c_lib.__error() ctypes.get_errno = lambda: _where_is_errno().contents.value哪里
standard_c_lib：
def get_libc_name(): if sys.platform == 'win32': # Parses sys.version and deduces the version of the compiler import distutils.msvccompiler version = distutils.msvccompiler.get_build_version() if version is None: # This logic works with official builds of Python. if sys.version_info < (2, 4): clibname = 'msvcrt' else: clibname = 'msvcr71' else: if version <= 6: clibname = 'msvcrt' else: clibname = 'msvcr%d' % (version * 10) # If python was built with in debug mode import imp if imp.get_suffixes()[0][0] == '_d.pyd': clibname += 'd' return clibname+'.dll' else: return ctypes.util.find_library('c')# Make sure the name is determined during import, not at runtimelibc_name = get_libc_name() standard_c_lib = ctypes.cdll.LoadLibrary(get_libc_name())
