代碼如下:

class Super:  
    def method(self):  
        print "Super's method"  
  
class Sub(Super):  
    def method(self):  
        print "Sub's method"  
        Super.method()  
        print "Over..."  
  
S = Sub()  
S.method()  

執(zhí)行上面一段代碼，錯(cuò)誤如下:

代碼如下:

>>>   
Sub's method  
  
Traceback (most recent call last):  
  File "D:\Learn\Python\test.py", line 12, in <module>  
    S.method()  
  File "D:\Learn\Python\test.py", line 8, in method  
    Super.method()  
TypeError: unbound method method() must be called with Super instance as first argument (got nothing instead)  

【錯(cuò)誤分析】Python中調(diào)用類的方法，必須與實(shí)例綁定，或者調(diào)用自身.

代碼如下:

ClassName.method(x, 'Parm')
ClassName.method(self)

所以上面代碼，要調(diào)用Super類的話，只需要加個(gè)self參數(shù)即可。

代碼如下:

class Super:  
    def method(self):  
        print "Super's method"  
  
class Sub(Super):  
    def method(self):  
        print "Sub's method"  
        Super.method(self)  
        print "Over..."  
  
S = Sub()  
S.method()  

#輸出結(jié)果

>>>   
Sub's method  
Super's method  
Over...