python实现字符串元素计数

代码： str = input('请输入字符串：\n') letter = 0 space = 0 number = 0 symbol = 0 underLine = 0 for char in str: if 'a' <= char <= 'z' or 'A' <= char <= 'Z': letter += 1 elif '0' <= char <= '9':

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