Surprising difference between StringIO.StringIO and io.StringIO

[Skip Montanaro]

>
> I would expect io.StringIO to be a match for the io.* stuff in Python
> 3. So it should care whether it is a binary stream or a text stream.
> Whereas StringIO.StringIO is your good old Python 2 StringIO, which expects
> strs.
>
> On that basis, io.StringIO is a text stream, expecting Unicode
> objects for transcription. 'str' is, in that context, probably
> considered as 'bytes' in Python 3.
>

Thanks.  This example was based on a function in Matplotlib. It appears the
author switched from StringIO.StringIO to io.StringIO between 1.1 and 1.2.

Skip
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