[Python]方法参数

 

#!/usr/local/bin/python3
#coding=UTF-8
'''''
Created on 2011-2-25
@author: Jacky
'''
#固定长度参数
def display(arg):
    print("arg:",arg)

display(1)
display("1")
display([1])
display((1,2))
display({1:1})
print()

#默认参数
def display(arg, name="zhang"):
    print("arg:",arg,"name:",name)

display(1)
display(1,"wang")
display(1,name="tang")
print()


#变长参数,将多余的参数存储到元祖中
def display(*args):
    print("arg:",args)

display(1)
display(1,2)
display(1,2,3)

display(*(1,))
display(*(1,2))
display(*(1,2,3))

#会将列表转换成元祖
display(*[1])
display(*[1,2])
display(*[1,2,3])

#会将字典的键转换成元祖,而字典的值会被丢弃
display(*{1:1})
display(*{1:1,2:2})
display(*{1:1,2:2,3:3})

print()

#变长参数,将多余的参数存储到字典中
def display(**kwargs):
    print("arg:",kwargs)

display(zhang=1)
display(zhang=1,wang=2)
display(zhang=1,wang=2,tang=3)
display(**{"zhang":1})
display(**{"zhang":1,"wang":2})
display(**{"zhang":1,"wang":2,"tang":3})
print()