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def login():
    print 'login'
def logout():
    print 'logout'
controllers = {
'in': login,                                                ##£¨ÀàËÆcÖеģºÊ¹Óú¯ÊýÈë¿ÚµØÖ·×÷Ϊ×ÖµäµÄÖµ£©
'out':logout,
}
def dispatcher(url, controllers):
    func = controllers.get(url, None)         ##£¨ÀàËÆcÖеģº½«º¯ÊýÈë¿ÚÖ¸Õ븳¸øfunc£©
    if func:
        func()                                              ##£¨ÀàËÆcÖеģºÕâÀïͨ¹ýº¯ÊýÈë¿ÚÖ¸Õëµ÷Óú¯Êý£©
    else:
        print 'Wrong url!'
dispatcher('in',controllers)
dispatcher('out',controllers)
dispatcher('23',controllers)
½á¹û £º
login
logout
Wrong url!
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    pass
a=f1        ##°Ñº¯Êý¶ÔÏóf1¸³¸øa
print a
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f1()         ##µ÷Óú¯Êý¶ÔÏó
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if date.month == 12:
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