The `assertAlmostEqual(x, y)`

method in Python’s unit testing framework tests whether x and y are approximately equal. This is similar to ` self.assertEqual`

but there are some additional things to be considered.

`self.assertAlmostEqual(0.5, 0.4)`

that won’t end it true, which is totally correct.

` assertAlmostEqual`

has an additional parameter `place`

which takes the no of decimal places upto which the number will be rounded of too. By default `places=7`

which makes the above two floats not equal.

```
self.assertAlmostEqual(0.12345999, 0.12345888, 5)
// 0.12345999 and 0.12345888 are equal when rounded to 5 places that is 0.12345 so they pass
```

For more precise calculations 4th parameter ` delta`

can also be added which ensures difference between first and second must be less or equal to delta. Default value for `delta`

is 0.

```
self.assertAlmostEqual(0.12345999, 0.12345444, 5, 0.00001)
// Once rounded to 5 places the difference is 0.00001 so this will pass
```