本文介绍了Python super()引发TypeError的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在Python 2.5中,以下代码引发 TypeError
:
In Python 2.5, the following code raises a TypeError
:
>>> class X:
def a(self):
print "a"
>>> class Y(X):
def a(self):
super(Y,self).a()
print "b"
>>> c = Y()
>>> c.a()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in a
TypeError: super() argument 1 must be type, not classobj
如果我用类X(对象)替换
,它会起作用。对此有何解释?类X
If I replace the class X
with class X(object)
, it will work. What's the explanation for this?
推荐答案
原因是仅适用于,在2.x系列中意味着从对象:
The reason is that super()
only operates on new-style classes, which in the 2.x series means extending from object
:
>>> class X(object):
def a(self):
print 'a'
>>> class Y(X):
def a(self):
super(Y, self).a()
print 'b'
>>> c = Y()
>>> c.a()
a
b
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