[docs] [issue10488] Improve documentation for 'float' built-in.

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Ah yes;  good point about __float__. I'll revise.

Ezio Melotti also suggested (on #python-dev) that it would be useful to have some examples here.

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nosy: +ezio.melotti

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10488>
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