python中字符串的大小写转换

 

1、大写改为小写

>>> test1 = "abCDEfg"
>>> test1 'abCDEfg'
>>> test1.upper() 'ABCDEFG'

 

2、小写变大写

>>> test1 'abCDEfg'
>>> test1.lower() 'abcdefg'
>>> test1 'abCDEfg'
>>> test1.casefold() 'abcdefg'

 

3、首字母改为大写

>>> test1 'abCDEfg'
>>> test1.capitalize() 'Abcdefg'
>>> test1 'abCDEfg'
>>> test1.title() 'Abcdefg'

 

4、大写变小写、小写变大写

>>> test1 'abCDEfg'
>>> test1.swapcase() 'ABcdeFG'