[issue35447] Redundant try-except block in urllib

[Shishmarev Pavel]

Shishmarev Pavel <pashawnn at gmail.com> added the comment:

https://github.com/python/cpython/blob/master/Lib/urllib/parse.py#L875
It's redundant to raise and then catch exception.

I mean:
if len(query) and not isinstance(query[0], tuple):
    ty, va, tb = sys.exc_info()
    raise TypeError("not a valid non-string sequence "
                    "or mapping object").with_traceback(tb)


Would be more clean.

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