为什么加了 r''转义还需要 斜杠来转义呢？

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#1 Created at ... [Delete] [Delete and Lock User]

像这个

>>> re.split(r'[\s\,\;]+', 'a,b;; c  d')
['a', 'b', 'c', 'd']

#2 Created at ... [Delete] [Delete and Lock User]

自己试了下，不加斜杠得出的结果是一样的