The method of parameters given in Python

理解Python函数参数与默认值

原创于 2012-02-07 11:48:33 发布 · 644 阅读

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本文详细介绍了Python中函数参数的使用，包括位置参数、默认参数、关键字参数及组合参数的实现方式，并通过实例展示了如何正确应用这些特性。

def fun(self, a, b, c=None): The default value can be given, but must be given all in the rightest
def fun(self,a,b, *c): The group of parameters can be given, but only one of the default parameters and group parameters can be given. It conform to the logical. The group parameters is stored in a tuple.
When giving the parameters, if a is a list. fun(*a) is giving the element of a list to the function, fun(a) is giving a list to the function...
if b is a dictionary, fun(b) is giving a dictionary to the function, fun(*b) is giving the key of the dictionary to the function, fun(**b) is given the item of the dictionary to the function.