a Python bug report

[José María Mateos]

On Wed, May 30, 2018 at 01:07:38AM +0000, Ruifeng Guo wrote:
> Hello,
> We encountered a bug in Python recently, we checked the behavior for Python version 2.7.12, and 3.1.1, both version show the same behavior. Please see below the unexpected behavior in "red text".

Have you tried the round() function, however?

In [1]: round(1000 * 1.017)
Out[1]: 1017.0

This is a floating point precision "issue". int() only gets rid of the 
decimals.

In [2]: int(3.9)
Out[2]: 3

Because:

In [3]: 1000 * 1.017
Out[3]: 1016.9999999999999

So there you have it.

Some more reading: 
https://stackoverflow.com/questions/43660910/python-difference-between-round-and-int

Cheers,

-- 
José María (Chema) Mateos
https://rinzewind.org/blog-es || https://rinzewind.org/blog-en