class a():
        def __init__(self):
                fp = open("a_file_lager_1M","rb")
                self.ll = fp.read()
                fp.close()
                self.h = b(self.aaa)
        def aaa(self):
                pass

class b:
        def __init__(self,bbb):
                self.a = bbb  #remove the "self.", the memory use will be very low!
		pass

def c():
        k=a()

while True:
        c()