GvR> if isinstance(x, str) or isinstance(x, unicode): > > is
GvR> apparently too much typing.
NS> Perhaps we could extend isinstance(). How about
NS> isinstance(x, str, unicode)
NS> or
NS> isinstance(x, (str, unicode))
NS> This is a common problem not limited to string types. I often
NS> want to test if something is a tuple or a list for example.
That's an interesting idea, but please use the former signature, not
the latter.
And what would it return? It needs to return a true value on success,
but maybe instead of returning 1, it might be more useful to return
the type argument that matched, e.g.:
>>> isinstance('', str, unicode)
<type 'str'>
>>> isinstance(u'', str, unicode)
<type 'unicode'>
>>> isinstance((), list, dictionary, tuple)
<type 'tuple'>
>>> isinstance(7, list, dictionary, tuple)
0
-Barry
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