python里面三个很有用的大小写处理方法

    xiaoxiao2021-03-29  33

    (1)title()方法:返回标题化字符串,即所有的单词以大写开始,其余的为小写

             语法格式:str.title()

              如:a = "My name is xiao ming"

                     print a.title()

              结果是:My Name Is Xiao Ming

    (2)upper()方法:将字符串全部改为大写

              语法格式:str.upper()

              如:a = "My name is xiao ming"

                     print a.upper()

              结果是:MY NAME IS XIAO MING

    (3)lower()方法:将字符串全部改为小写

              语法格式:str.lower()

              如:a = "My name is xiao ming"

                     print a.lower()

              结果是:my name is xiao ming

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