Cournapeau David <da...@ar.media.kyoto-u.ac.jp> added the comment:

> I disagree. *Why* do you think it should work?  It fails for many other 
> types:

I don't understand the rationale: why not making something work better
if possible ? Also, I don't understand the comparison with Decimal or
Fraction; there is a big difference between making the roundtrip not
possible at all for a type, and making it possible only for some values.

> I think the *right* solution is to define repr of a complex number
> z to be:

Why ? I don't understand those examples: maybe I am missing your
argument, but I understand it as we should not fix one bug because there
are another bugs related to inf and nan in complex. For me, something like:

a = complex(0)
a *= float('inf') * 1j
-> a = nan+nanj

Is really not desirable. That's actually a more serious bug than this
one. Are you saying that python does not care about inf/nan for complex
numbers ? If so, be it, but it would a bit unfortunate.

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<http://bugs.python.org/issue2121>
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