Steven D'Aprano <steve+pyt...@pearwood.info> added the comment:

Oh I can just imagine the bike-shedding on this one :-)

I'm not really convinced this is needed, but for what it's worth I think that 
given the intended use-case (checking function parameters) ValueError would be 
a more appropriate default exception type. The given argument has the wrong 
value, hence ValueError.

On the other hand, it is more common (at least for me) to check arguments with 
isinstance, so maybe the default should be TypeError.

Definitely needs a PEP.

----------
nosy: +steven.daprano
stage: needs patch -> 

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32590>
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