get_memory_info_win.py

import ctypes


class MEMORYSTATUSEX(ctypes.Structure):

    _fields_ = [
        ('dwLength',                ctypes.c_ulong),
        ('dwMemoryLoad',            ctypes.c_ulong),
        ('ullTotalPhys',            ctypes.c_ulonglong),
        ('ullAvailPhys',            ctypes.c_ulonglong),
        ('ullTotalPageFile',        ctypes.c_ulonglong),
        ('ullAvailPageFile',        ctypes.c_ulonglong),
        ('ullTotalVirtual',         ctypes.c_ulonglong),
        ('ullAvailVirtual',         ctypes.c_ulonglong),
        ('ullAvailExtendedVirtual', ctypes.c_ulonglong)
    ]


info = MEMORYSTATUSEX()
info.dwLength = ctypes.sizeof(info)
ctypes.windll.kernel32.GlobalMemoryStatusEx(info)

print(info.ullTotalPhys/2**30)
print(info.ullAvailPhys/2**30)