python - 如何在 Windows 上获取总磁盘大小？

Question

我可以使用 ctypes 和 MEMORYSTATUSEX() 获得 RAM 大小，但我无法找到总磁盘大小(不是可用空间，而是总容量)一般而言)。

Answer 1

ActiveState 有一个 recipe为此，使用 Windows GetDiskFreeSpaceEx功能。当我做了一些有限的测试时它似乎可以工作，但是它有很多潜在的问题，所以这里有一个大大改进和更可靠的版本，至少在 Python 2.7+ 到 3.x 中工作)并且只使用内置 -在模块中。

@Eryk Sun 应该为增强功能获得大部分荣誉/指责，因为他显然是使用 ctypes 主题的专家。

import os
import collections
import ctypes
import sys

import locale
locale.setlocale(locale.LC_ALL, '')  # set locale to default to get thousands separators

PULARGE_INTEGER = ctypes.POINTER(ctypes.c_ulonglong)  # Pointer to large unsigned integer
kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)
kernel32.GetDiskFreeSpaceExW.argtypes = (ctypes.c_wchar_p,) + (PULARGE_INTEGER,) * 3

class UsageTuple(collections.namedtuple('UsageTuple', 'total, used, free')):
    def __str__(self):
        # Add thousands separator to numbers displayed
        return self.__class__.__name__ + '(total={:n}, used={:n}, free={:n})'.format(*self)

def disk_usage(path):
    if sys.version_info < (3,):  # Python 2?
        saved_conversion_mode = ctypes.set_conversion_mode('mbcs', 'strict')
    else:
        try:
            path = os.fsdecode(path)  # allows str or bytes (or os.PathLike in Python 3.6+)
        except AttributeError:  # fsdecode() not added until Python 3.2
            pass

    # Define variables to receive results when passed as "by reference" arguments
    _, total, free = ctypes.c_ulonglong(), ctypes.c_ulonglong(), ctypes.c_ulonglong()

    success = kernel32.GetDiskFreeSpaceExW(
                            path, ctypes.byref(_), ctypes.byref(total), ctypes.byref(free))
    if not success:
        error_code = ctypes.get_last_error()

    if sys.version_info < (3,):  # Python 2?
        ctypes.set_conversion_mode(*saved_conversion_mode)  # restore conversion mode

    if not success:
        windows_error_message = ctypes.FormatError(error_code)
        raise ctypes.WinError(error_code, '{} {!r}'.format(windows_error_message, path))

    used = total.value - free.value
    return UsageTuple(total.value, used, free.value)

if __name__ == '__main__':
    print(disk_usage('C:/'))

示例输出:

UsageTuple(total=102,025,392,128, used=66,308,366,336, free=35,717,025,792)