没有'self'的Python调用方法 [英] Python calling method without 'self'
问题描述
所以我刚开始用python编程,但我不了解自我背后的全部原因。我知道它几乎像全局变量一样使用,因此可以在类中的不同方法之间传递数据。我不明白为什么在同一类中调用另一个方法时需要使用它。如果我已经在那堂课上,为什么我必须告诉它呢?
So I just started programming in python and I don't understand the whole reasoning behind 'self'. I understand that it is used almost like a global variable, so that data can be passed between different methods in the class. I don't understand why you need to use it when your calling another method in the same class. If I am already in that class, why do I have to tell it??
例如,如果我有:
为什么我需要self.thing(
example, if I have: Why do I need self.thing()?
class bla:
def hello(self):
self.thing()
def thing(self):
print "hello"
推荐答案
还可以在类 static
中创建方法,因此不需要 self
。但是,如果您确实需要它,请使用它。
Also you can make methods in class static
so no need for self
. However, use this if you really need that.
您的用户:
class bla:
def hello(self):
self.thing()
def thing(self):
print "hello"
静态版本:
class bla:
@staticmethod
def hello():
bla.thing()
@staticmethod
def thing():
print "hello"
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