Ned Deily added the comment:
What you are seeing is due to the limitations of binary floating-point
arithmetic. The issue is described in more detail in the Python tutorial:
https://docs.python.org/2/tutorial/floatingpoint.html#tut-fp-issues
--
nosy: +ned.deily
resolution: -> not a b
New submission from Larry:
Certain values close to the rounding boundary are rounded down instead of up;
and this is done somewhat inconsistently.
#Example (python v2.7.8, and previous)
#almost an odd-even pattern, but not quite
for x in [1.045, 1.145, 1.245, 1.345, 1.445, 1.545, 1.645, 1.745
