1.将字符串所有字符转为大写
upper()
str="StopPed by uSer"
print(str.upper())
#结果为 STOPPED BY USER
2.将字符串所有字符转为小写
lower()
str="StopPed by uSer"
print(str.lower())
#结果为 stopped by user
3.将字符串第一个字母转为大写，其余转成小写
capitalize()
str="stopPed by uSer"
print(str.capitalize())
#结果为 Stopped by user
4.将字符串每个单词的首字母转为大写，其余为小写
title()
str="StopPed by uSer"
print(str.title())
#结果为 Stopped By User
相关内容
istitle() 判断字符串是否是每个单词的首字母转为大写，其余为小写的形式
str="StopPed by uSer"
print(str.istitle())
#结果为 False
str="Stopped By User"
print(str.istitle())
#结果为True
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