import subprocess, ctypes
DWORD = ctypes.c_ulong
class PROCESS_MEMORY_COUNTERS(ctypes.Structure):
    _field_ =[("cb",DWORD),
              ("PageFaultCount",DWORD),
              ("PeakWorkingSetSize",ctypes.c_size_t),
              ("WorkingSetSize",ctypes.c_size_t),
              ("QuotaPeakPagedPoolUsage",ctypes.c_size_t),
              ("QuotaPagedPoolUsage",ctypes.c_size_t),
              ("QuotaPeakNonPagedPoolUsage",ctypes.c_size_t),
              ("QuotaNonPagedPoolUsage",ctypes.c_size_t),
              ("PagefileUsage",ctypes.c_size_t),
              ("PeakPagefileUsage",ctypes.c_size_t)
              ]
arg = PROCESS_MEMORY_COUNTERS()
process = subprocess.Popen("Notepad")
print ctypes.windll.Psapi.GetProcessMemoryInfo(int(process._handle),arg,0)