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#¹ØÓڻص÷¹¦ÄܵIJâÊÔ
#FunctorÊÇÕâÖֻص÷¹¦ÄܵĹؼü¶ÔÏó
class Functor:
    """Simple functor class."""
    def __init__( self, fn, *args ):
        self.fn = fn
        self.args = args
    def __call__( self, *args ):
        self.fn( *(self.args + args) )
#Ïë¶Ô¸Ãº¯Êý½øÐлص÷²Ù×÷       
def test_callback1(arg1, arg2):
    print "test_callback1", arg1, arg2
#ÏȽøÐмòµ¥µØ²âÊÔ
obj_call1 = Functor(test_callback1, 1111, 'qweqwe111111111')
obj_call1()
#½á¹û£º
#test_callback1 1111 qweqwe111111111
#¿´¿´¹ý³ÌÖдøÈë²ÎÊýµÄ·½Ê½
def test_callback2(arg1, arg2, call_arg):
    print "test_callback2", arg1, arg2, call_arg
obj_call2 = Functor(test_callback2, 2222, 'qweqwe22222222')
obj_call2(222)#¹ý³ÌÖÐÊäÈë²ÎÊý£¬²¢ÇÒʹ»Øµ÷º¯ÊýµÃµ½Õâ¸ö²ÎÊý
#½á¹û£º
#test_callback2 2222 qweqwe22222222 222
#ÔÙÀ´¿´¿´¶ÔÏóÖеķ½·¨±»ÓÃÀ´»Øµ÷
#»ù±¾Ô­ÀíÓëÉÏÃæÁ½¸öÀý×ÓÏàͬ£¬µ«¿ÉÒÔÒýÈë¶ÔÏó±¾ÉíµÄº¯Êý
#²¢ÇÒÒ²¿ÉÒýÈëÆäËû¶ÔÏó½øÐлص÷£¬ÄÇôËüµÄÓ÷¨½«»á·Ç³£·á¸»
class Test:
    def __init__(self):
        pass
   
    def test_callback1(self, arg1, arg2):
        print "Test.test_callback 1111", arg1, arg2
   
    def test_callback2(self, arg1, arg2, call_arg):
        print "Test.test_callback 2222", arg1, arg2, call_arg
       
    def test_callback_arg(self):
        obj_call1 = Functor(self.test_callback1, 1111, 'qweqwe1111')
        print "obj_call1 = ",obj_call1
     


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>>> def powersum(power, *args):
...      '''Return the sum of each argument raised to specified power.'''
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>>> import string
>>> s='adbecf'
>>>
tt=string.maketrans("abc","ABC")
>>> s.translate(tt,"")
'AdBeCf'
>>>
s.translate(tt,"")
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(1) os.system
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system(command) -> exit_status   
Execute the command (a string) in a subshell. 
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python setup.py install
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