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。

class Foo():
    def foo(self):
        pass
print(type(Foo().foo))
print(type(Foo.foo))
# print(Foo().foo.__class__)
# 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