No1.字符串的魔法

#首字母大写 >>> test = "trony" >>> v = test.capitalize() >>> print(v) Trony #将字符串中大写变小写有两个方法casefold()和lower()，casefold()更加的牛逼，它能够将许多未知的字符串变小写 >>> test = "FDKFJ" >>> v1 = test.casefold() >>> print(v1) fdkf

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