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並前往https://codereview.stackexchange.com/questions/14901/using-default-none-values-in-python-when-assigning-split-to-a-tuple

Using default None values in Python when assigning split() to ...

try: track, num_tracks = track_info.split('/', 1) except: track, num_tracks = track_info, None. Honestly, this is not a terrible solution.

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