python去除字符串换行
>>> 'test string\n'.rstrip()
'test string'>>> 'test string \n \r\n\n\r \n\n'.rstrip()
'test string'>>> 'test string \n \r\n\n\r \n\n'.rstrip('\n')
'test string \n \r\n\n\r '>>> s = " \n\r\n \n abc def \n\r\n \n "
>>> s.strip()
'abc def'
>>> s.lstrip()
'abc def \n\r\n \n '
>>> s.rstrip()
' \n\r\n \n abc def'参考
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