Python的程序结构[4] -> 函数/Function[0] -> 函数与方法的区别

函数与方法的区别 / Distinction of Function and Method

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关于函数与方法的区别，可根据两者的定义看出，

函数function -- A series of statements which returns some value to a caller. It can also be passed zero or more arguments which may be used in the execution of the body.

方法method -- A function which is defined inside a class body. If called as an attribute of an instance of that class, the method will get the instance object as its first argument (which is usually called self).

从定义上来看，可以说，方法是一种依赖于类对象的特殊函数。

1 class Foo():
2     def foo(self):
3         pass
4 print(type(Foo().foo))
5 print(type(Foo.foo))
6 # print(Foo().foo.__class__)
7 # print(Foo.foo.__class__)

从输出中可以看出，脱离了类实例的方法依旧是函数（此处的 type 等价于调用了内置的 __class__ 函数）。

<class 'method'>
<class 'function'>

 

参考链接

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http://blog.csdn.net/peachpi/article/details/6047826