["python","unit-testing","pytest","assert"]
pytest: assert almost equal

How to do assert almost equal with pytest for floats without resorting to something like: assert x - 0.00001 <= y <= x + 0.00001 More specifically it will be useful to know a neat solution for quickly comparing pairs of float, without unpacking them: assert (1.32, 2.4) == i_return_tuple_of_two_floats()
I noticed that this question specifically asked about pytest. pytest 3.0 includes an approx() function (well, really class) that is very useful for this purpose. import pytest assert 2.2 == pytest.approx(2.3) # fails, default is ± 2.3e-06 assert 2.2 == pytest.approx(2.3, 0.1) # passes # also works the other way, in case you were worried: assert pytest.approx(2.3, 0.1) == 2.2 # passes