Python之字符串

1.字符串使用

>>> str="what are you doing"
>>> print(str.title())
What Are You Doing

使用title()函数时，可修改字符串字母的大小写，如上所述

>>> str="What Are You Doing"
>>> print(str.upper())
WHAT ARE YOU DOING

使用upper()函数，可以将字符串字母全部改为大写

>>> str="What Are You Doing"
>>> print(str.lower())
what are you doing

使用lower()函数，可以将字符串字母全部改为小写

2.拼接字符串

>>> str1="my name is"
>>> str2="wu ming"
>>> str3=""+str1+""+str2+"."
>>> print(str3)
my name iswu ming.

>>> from time import ctime
>>> print("new tile is"+ctime())
new tile isWed Oct 21 17:23:45 2020

3.将字符串拆成列表
使用split()函数，可以将字符串拆成列表

>>> str='what are you doing'
>>> list=str.split()
>>> list
['what', 'are', 'you', 'doing']