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Rounding - DPaul - Jul-04-2022
I have developed an app, which does lengthy, but not very complicated calculations.
The main thing is that it produces end results, rounded numbers to 2 decimals.
Works well. (On my PC)
I made an executable with pyinstaller : pyinstaller --onefile --windowed xxx.py,
and gave it to somebody else.
With the identical dataset, his results are the same except for the rounding.
I have eg. : 616.51
His PC produces : 616.5199999999999
Am I naive in thinking that an executable should always produce the exact same result als the source?
How can this be ?
Paul
RE: Rounding - Larz60+ - Jul-04-2022
Please see: https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html
RE: Rounding - Skaperen - Jul-04-2022
...or... try the calculations with the decimal.Decimal type. actually, read that document, anyway, first. then read about the decimal.Decimal type.
RE: Rounding - DPaul - Jul-04-2022
wow, all this is not for the faint of heart.
Will try to make some sense of it.
Paul
RE: Rounding - Skaperen - Jul-06-2022
(Jul-04-2022, 05:08 PM)DPaul Wrote: wow, all this is not for the faint of heart.the same can be said for many other things when you dive deep into programming. get used to it.