import gc

def memory():
    import os
    from wmi import WMI
    w = WMI('.')
    result = w.query("SELECT WorkingSet FROM Win32_PerfRawData_PerfProc_Process WHERE IDProcess=%d" % os.getpid())
    res = int(result[0].WorkingSet)
    return res / 1048576.0

def test():

 BIG_NUM = 10000000

 print memory()
 a = range(BIG_NUM)
 print 'in test', memory()

 def f():
    b = range(BIG_NUM)
    print 'in f', memory()


 f()
 print 'after f', memory()

 f()
 print 'after f', memory()

 print gc.collect()
 print memory()
               
test()
print memory()
gc.collect()
print memory()