Question

Python类继承错误

代码如下：
class Base:
def _init_(self):
self.data=[]
def add(self,x):
self.data.append(x)
class Child(Base):
def _init_(self):
self.data=[]
Base._init_(self)
def add(self,x):
Base.add(self,x)
def plus(self,a,b):
return a+b

oChild=Child()
oChild.add("str1")
print oChild.data
print oChild.plus(2,7)

错误如下：
>>> ================================ RESTART ================================
>>>
Traceback (most recent call last):
File "D:/PyCodes/test12", line 16, in <module>
oChild.add("str1")
File "D:/PyCodes/test12", line 11, in add
Base.add(self,x)
File "D:/PyCodes/test12", line 5, in add
self.data.append(x)
AttributeError: Child instance has no attribute 'data'
>>>

这个问题怎么解决？

Answer 1

将你的_init_改成__init__

是2个下划线