python:TypeError: must be type, not classobj-YEELON
今天遇到这个错误:Traceback (most recent call last):
File "t2.py", line 14, in <module>
print Derived().meth()
File "t2.py", line 10, in meth
super(Derived,self).meth()
TypeError: must be type, not> 试验代码如下:
[*]class Base():
[*] def meth(self):
[*] print "i'm base"
[*]
[*]class Derived(Base):
[*] def meth(self):
[*] super(Derived,self).meth()
[*] print "this is derived"
[*]
[*]print Derived().meth()
google了下,发现原因是:
super只能用于python的新类中,如果基类是经典类,则会报这个错。
新类和经典类又是什么呢?
新类:所有类都必须要有继承的类,如果什么都不想继承,就继承到object类。
经典类:什么都不用继承的类,如上面的代码就是经典类。所以报错。
[*]class Base(object):
[*] def meth(self):
[*] print "i'm base"
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