SilentGhost added the comment:
Mathieu, nothing was attached. The penalty's worth only a few if statements, I
wouldn't worry too much about it. Besides, a C version is going to be provided
as well, right?
Perhaps the following approach might solve the subclasses problem:
regex = dispatch.get(cls)
if not regex:
classes = datetime, date, time
cls = next((c for c in classes if issubclass(cls, c)), None)
if cls is None:
raise TypeError
regex = dispatch[cls]
Perhaps, TypeError is unnecessary there and just propagating StopIteration
would do. In that case the if clause would look like:
classes = datetime, date, time
cls = next(c for c in classes if issubclass(cls, c))
regex = dispatch[cls]
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<http://bugs.python.org/issue15873>
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