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
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) 复制代码 输出结果:
HELLO world Hello Hello World
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