python中的upperlowercapitalizetitle

Posted 2020-10-06

upper()字符串中字母由小写变为大写

lower()字符串中字母由大写变为小写

capitalize()字符串中字母首字母大写其余小写

title()字符串中字母每个单词的首字母大写其余小写

举个列子：

 1 a = "hello"
 2 b = "WORLD"
 3 c = "hello"
 4 d = "hello world"
 5 a1 = a.upper()
 6 b1 = b.lower()
 7 c1 = c.capitalize()
 8 d1 = d.title()
 9 print(a1)
10 print(b1)
11 print(c1)
12 print(d1)

输出结果：

HELLO
world
Hello
Hello World

实际运用就如上面代码书写。