[Chicago] duck typing to handle a string or iterable of strings

Jesse London jesselondon at gmail.com
Fri May 20 05:13:49 CEST 2011

> So I want a function or method to operate on one or more strings, but if
> the convention is usually one, I hate requiring the tuple/list wrapper
> around a string argument.

It sounds like what you really care about is whether or not you were handed
an iterable. If you don't want to say:

    def foo(*strings):

then you can reliably duck-type like so:

    def foo(strings):
        if not hasattr(strings, '__iter__'):
            strings = (strings,)

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