On 18/02/13 12:05, Oscar Benjamin wrote: > On 18 February 2013 12:03, Oscar Benjamin <oscar.j.benja...@gmail.com> wrote: >> On 18 February 2013 11:47, John Reid <johnbaronr...@gmail.com> wrote: >>> I'm seeing this problem because of the following code in IPython: >>> >>> def canSequence(obj): >>> if isinstance(obj, (list, tuple)): >>> t = type(obj) >>> return t([can(i) for i in obj]) >>> else: >>> return obj >> What is the point of the code above? If obj is a list or a tuple you >> create a new list or tuple with the same data and then return it >> otherwise you just return the object. What about: > Sorry, I didn't read this properly. I see that you want apply can() to > all the elements. What is the reason for wanting to preserve the type > of the sequence? > > Well like I said it is not me that wants to do this. It is part of the code in IPython for sending messages between clients and engines.
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