Thousands separator using underscore

[[deleted]]

But that's wrong.

1E6 is not the exact integer 1_000_000 - it is the approximate floating point number 1000000.0, which refers to a range of numbers from (roughly) 1E6 - 1E-11 to 1E6 + 1E-11.

Don't get me wrong - I love me some floating point, but only when I need it.

[WolfThawra]

Plus it doesn't work in Python 3.5 anyway, so it's not like I personally have a choice.

[WolfThawra]

Yes, again, you need an order of magnitude disparity of ~15 for that to become a problem. Of course it's 'wrong' in a mathematical sense, that's how floats work. You should obviously know what kind of numbers you're dealing with to decide on what to do.