学习笔记（17):零基础掌握 Python 入门到实战-重复利用 事半功倍

立即学习:/course/play/26676/338764?utm_source=blogtoedu

位置参数

默认值放后面

def change_upper_lower(s):

lst = [i.upper() if(i==i.lower()) else i.lower() for i in s]

return ''.join(lst)

def change_in(dct,**kwargs):

r = {k:v for k,v in kwargs.items() if(dct.get(k)==v)}

return r

dct = {'a':1,'b':40,'c':6}

result = change_in(dct,a=1,b=3)

result