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Tue Mar 30 14:16:53 EST 2004 · http://mail.python.org/pipermail/python-dev/2004-March/043714.html

> That doesn't make sense to me.  If the .py file says "1.1" and the
> .pyc file says "1.1", you're going to get the same results.
> 
> In fact, you've just given a stronger reason for keeping "1.1".
> Currently, compiling a .py file containing "1.1" produces a .pyc file
> containing "1.1000000000000001".  .pyc files are supposed to be
> platform-independent.  If these files are then run on a platform with
> different floating-point precision, the .py and the .pyc will produce
> different results.

I believe (please correct me if I'm wrong), that Python floats, on all
platforms, are IEEE 754 doubles.  That is, Python uses the 8-byte FP,
not the (arguably worthless) 4-bit FP.  Cross-platform precision is not
an issue.

 - Josiah

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[Python-Dev] Expert floats