Python的序列参数和字典参数

最新推荐文章于 2025-06-25 17:17:11 发布

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最新推荐文章于 2025-06-25 17:17:11 发布

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分类专栏： Python的学习文章标签： Python的序列参数和字典参数

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本文深入探讨了Python中函数参数的两种特殊用法：序列参数和字典参数。通过实例演示了如何将列表和字典作为参数传递给函数，并解释了星号(*)和双星号(**)的作用。

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1.序列参数：所有参数作为一个列表传入

>>> def fun(a,b,c):
	print('value of a is {}'.format(a))
	print('value of b is %s'% b)
	print('value of c is {}'.format(c))

	
>>> fun('one','two','three')
value of a is one
value of b is two
value of c is three
>>> l = ['one','two','three']
>>> fun(l)
Traceback (most recent call last):
  File "<pyshell#21>", line 1, in <module>
    fun(l)
TypeError: fun() missing 2 required positional arguments: 'b' and 'c'
>>> fun(*l)
value of a is one
value of b is two
value of c is three

2.字典参数：所有参数作为一个字典传入

>>> def fun(a,b,c):
	print('value of a is {}'.format(a))
	print('value of b is %s'% b)
	print('value of c is {}'.format(c))

	
>>> d = {'a':'one','b':'two','c':'three'}
>>> fun(*d)
value of a is a
value of b is b
value of c is c
>>> fun(**d)
value of a is one
value of b is two
value of c is three