MAX = 100000

import thread
import time
import sys

class foo(object):
    def __init__(self, n):
        self.n = n
    __slots__ = ['n']

def run(*args):
    o = None
    for i in xrange(MAX):
        o = foo(o)
    print 'alloc OK'
    del o
    print 'dealloc OK'
    thread.exit()

if __name__ == '__main__':
    thread.start_new_thread(run, ())
    time.sleep(3)