Dict handling of floats
peter at engcorp.com
Fri Apr 25 15:09:20 CEST 2003
Raymond Hettinger wrote:
> > >I have come across a weirdness. I have a number of floats, (lat long
> > >pairs) which I stuff into a dict, but when I take them out, my nice %2f4
> > >number, (say, 47.5894) is something long and *almost* right, like
> > >47.589333333333333339. What gives?
> > Chances are that the float hasn't changed, but that
> > you're printing it in a different way.
> The Python FAQ has a pretty good explanation:
I looked for the FAQ entry to offer as well, but I wasn't satisfied
with that one. It refers to apparent errors from numerical calculations,
not primarily to the representation of the float when printed.
Is the OP's question deserving of a separate entry in the FAQ, or
at least an addendum to the one Raymond linked above?
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