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大小写转换

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运行环境python3

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def UCaseChar(ch): 
    if ord(ch) in range(97, 122): 
        return chr(ord(ch) - 32) 
    else:
        return ch 
def LCaseChar(ch): 
    if ord(ch) in range(65, 91): 
        return chr(ord(ch) + 32) 
    else:
        return ch 
def UCase(str): 
    return ''.join(map(UCaseChar, str)) 
def LCase(str): 
    return ''.join(map(LCaseChar, str)) 
print (LCase('ABC我abc')) 
print (UCase('ABC我abc'))

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