[issue7048] decimal.py: logb: round the result if it is greater than prec
report at bugs.python.org
Sat Nov 28 15:43:53 CET 2009
Mark Dickinson <dickinsm at gmail.com> added the comment:
There's a restriction on the second argument to scaleb in the spec,
namely that scaleb should be in the range -2*(Emax + precision) to
2*(Emax + precision) inclusive.
This restriction seems entirely arbitrary and unnecessary to me. My
guess is that it's there to ease implementation in low-level languages,
but it makes little sense for the Python implementation.
Here's a patch that removes this restriction on scaleb in the Python
implementation, and skips the corresponding tests.
Added file: http://bugs.python.org/file15411/scaleb.patch
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