code: def windows_memory_usage():
      
      from ctypes import windll, Structure, c_uint64, sizeof, byref
      from ctypes.wintypes import DWORD
      class MemoryStatus(Structure):
          _fields_ = [('dwLength', DWORD),
                      ('dwMemoryLoad',DWORD),
                      ('ullTotalPhys', c_uint64),
                      ('ullAvailPhys', c_uint64),
                      ('ullTotalPageFile', c_uint64),
                      ('ullAvailPageFile', c_uint64),
                      ('ullTotalVirtual', c_uint64),
                      ('ullAvailVirtual', c_uint64),
                      ('ullAvailExtendedVirtual', c_uint64),]
      memorystatus = MemoryStatus()
      # MSDN documetation states that dwLength must be set to MemoryStatus
      # size before calling GlobalMemoryStatusEx
      # https://msdn.microsoft.com/en-us/library/aa366770(v=vs.85)
      memorystatus.dwLength = sizeof(memorystatus)
      windll.kernel32.GlobalMemoryStatusEx(byref(memorystatus))
      return float(memorystatus.dwMemoryLoad)
docs: Return physical memory usage (float)
      Works on Windows platforms only