Steven D'Aprano <st...@pearwood.info> added the comment:

Mark suggested the following strategy for Decimal.from_float: "always 
use the largest exponent possible".

Just for the avoidance of all doubt, do you mean the largest exponent 
with the number normalised to one digit to the right of the decimal 
place? Because 1e1 = 0.1e2 = 0.01e3 = ... and there is no "largest 
exponent possible" if you allow unnormalised numbers. Seems obvious to 
me, but maybe I'm missing something.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue4796>
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