In Python pytest, we can assert that two floating-point numbers are almost equal using the `pytest.approx()`

function.

This function allows we to compare floating-point numbers with a certain tolerance, which accounts for small differences due to floating-point arithmetic.

To do this were write

```
import pytest
def test_almost_equal():
# Define two floating-point numbers
x = 0.1 + 0.2
y = 0.3
# Assert that x is almost equal to y with a tolerance of 1e-6
assert x == pytest.approx(y, abs=1e-6)
```

In this example, `pytest.approx()`

is used to assert that `x`

is almost equal to `y`

with a tolerance of `1e-6`

(i.e., `0.000001`

).

This tolerance accounts for small differences that may arise due to floating-point arithmetic.

We can adjust the `abs`

parameter of `pytest.approx()`

to set the desired tolerance level based on our requirements.

Alternatively, we can use the `rel`

parameter to specify a relative tolerance instead of an absolute tolerance.

If the two values are not almost equal within the specified tolerance, the test will fail, and pytest will provide details about the assertion failure.