upper

概要Description

签名

s.upper(): str

功能

将 s 所有字母变大写

返回改后的字符串，原字符串 s 在调用后保持不变

案例Examples

正常情况

1 2  =
s = 'zzax'result = s.upper()'zzax'

其它情况

1  =
'Documentation'.upper()'DOCUMENTATION'

1  =
'ZZAX'.upper()'ZZAX'

1  =
'9917'.upper()'9917'

1  =
' zzax '.upper()' ZZAX '

1  =
'赵哲'.upper()'赵哲'