python中的嵌套类

#!/usr/bin/env python

import threading, sys

def nested1(timeout):
    def _1(function):
        def _2(*args,**kw):
            class child(threading.Thread):
                def __init__(self):
                    threading.Thread.__init__(self)
                    self.result=None
                    self.error = None
                    
                    self.setDaemon(True)
                    self.start()

                def run(self):
                    try:
                        self.result = function(*args, **kw)
                    except:
                        self.error = sys.exc_info()

            c = child()
            c.join(timeout)
            if c.isAlive():
                raise TimeoutError, 'took too long'
            if c.error:
                raise c.error[0], c.error[1]
            return c.result
        return _2
    return _1
def test(a, b):
    for i in xrange(100000):
        a = a+b
    return a


if __name__ == '__main__':
    nested1 = nested1(2)
    nested2 = nested1(test)
    print nested2(2,3)

    a =  nested2.child()
    print a

#!/usr/bin/env python

import os, sys

class parent:
    def __init__(self):
        self.name = 'parent'

    def getName(self):
        print self.name

    class child:
        def __init__(self):
            self.name = 'child'

        def getName(self):
            print self.name


if __name__ == '__main__':
    child =  parent.child()
    child.getName()

if __name__ == '__main__':
    p = parent()
    p.getName()
    c =  p.child()
    c.getName()