On Apr 19, 2014, at 11:05 AM, Ethan Furman <et...@stoneleaf.us> wrote:

> Personal experience:  I have my own copy of paramiko because it type checks 
> for strings, and I routinely use a str-subclass.

I have had that kind of problem myself in the past. Most of the time the core 
issue wasn’t type checking, it was how (badly) it was implemented. `assert 
obj.__class__ == list` being my favorite one (especially when any iterable 
would work just fine).

-- 
Best regards,
Łukasz Langa

WWW: http://lukasz.langa.pl/
Twitter: @llanga
IRC: ambv on #python-dev
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