What is the best way to compare floats for almost-equality in Python?

Question

It\'s well known that comparing floats for equality is a little fiddly due to rounding and precision issues.

For example: https://randomascii.wordpress.com/2012/02/2

Answer 1

If you want to use it in testing/TDD context, I'd say this is a standard way:

from nose.tools import assert_almost_equals

assert_almost_equals(x, y, places=7) #default is 7