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①所有字母都转换为大写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.upper())输出:
hello, world!
②所有字母都转换为小写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.lower())输出:
hello, world!
③首字母转换成大写, 其余转换成小写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.capitalize())输出:
hello, world!
④所有单词的首字母转换成大写, 其余转换成小写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.title())输出:
hello, world!
⑤判断所有字母都为大写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.isupper()) b = ‘hello, world!’ print(b.isupper())输出:
truefalse
⑥判断所有字母都为小写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.islower()) b = ‘hello, world!’ print(b.islower())输出:
falsetrue
⑦判断所有单词的首字母为大写
# -*- coding:utf-8 -*-
if __name__ == “__main__”: a = ‘hello, world!’ print(a.istitle()) b = ‘hello, world!’ print(b.istitle()) c = ‘hello, world!’ print(c.istitle())输出:
falsefalsetrue
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