Available disk space on an SMB share, via Python

Does anyone know a way to get the amount of space available on a Windows (Sa开发者_Python百科mba) share via Python 2.6 with its standard library? (also running on Windows)

e.g.

>>> os.free_space("\\myshare\folder") # return free disk space, in bytes
1234567890

If PyWin32 is available:

free, total, totalfree = win32file.GetDiskFreeSpaceEx(r'\\server\share')

Where free is a amount of free space available to the current user, and totalfree is amount of free space total. Relevant documentation: PyWin32 docs, MSDN.

If PyWin32 is not guaranteed to be available, then for Python 2.5 and higher there is ctypes module in stdlib. Same function, using ctypes:

import sys
from ctypes import *

c_ulonglong_p = POINTER(c_ulonglong)

_GetDiskFreeSpace = windll.kernel32.GetDiskFreeSpaceExW
_GetDiskFreeSpace.argtypes = [c_wchar_p, c_ulonglong_p, c_ulonglong_p, c_ulonglong_p]

def GetDiskFreeSpace(path):
    if not isinstance(path, unicode):
        path = path.decode('mbcs') # this is windows only code
    free, total, totalfree = c_ulonglong(0), c_ulonglong(0), c_ulonglong(0)
    if not _GetDiskFreeSpace(path, pointer(free), pointer(total), pointer(totalfree)):
        raise WindowsError
    return free.value, total.value, totalfree.value

Could probably be done better but I'm not really familiar with ctypes.

The standard library has the os.statvfs() function, but unfortunately it's only available on Unix-like platforms.

In case there is some cygwin-python maybe it would work there?