How to Assert Almost Equal in Pytest?
To assert almost equal in Pytest, use the approx() method. This is useful for floating-point comparisons that may involve small rounding errors. Here's how to use it:
import pytest
def test_approx_equal():
assert 3.1 == pytest.approx(3.2, abs=0.2)
You can place pytest.approx() on either side of the comparison:
def test_approx_equal_reversed():
assert pytest.approx(3.2, abs=0.2) == 3.1
approx() also works with lists, tuples, and other sequences:
def test_approx_equal_list():
assert [0.1 + 0.3, 0.2 + 0.5] == pytest.approx([0.4, 0.7])
To learn more about Pytest, check out the beginner's guide to Pytest.
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