# How to Assert if an Exception Is Raised With Pytest?

Pytest can be used to test whether a function raises an exception. For instance, consider a division function that raises a `ZeroDivisionError` if there is an attempt to divide by zero:

```python
def divide(x, y):
    return x / y

divide(9, 0)
```

Attempting to execute this function with zero as the divisor results in a `ZeroDivisionError`:

```text
[output]
Traceback (most recent call last):
  File "/users/stanley/code.py", line 5, in <module>
    divide(9, 0)
  File "/users/stanley/code.py", line 2, in divide
    return x / y
           ~~^~~
ZeroDivisionError: division by zero
```

To verify that this exception is raised as expected, use the `pytest.raises` in a test case:

```python
import pytest

def divide(x, y):
    return x / y

def test_zero_division():
    with pytest.raises(ZeroDivisionError):
        divide(9, 0)
```

When this test is run, it confirms that the `divide()` function behaves as expected by successfully raising a `ZeroDivisionError` when dividing by zero, indicated by a passing test result:

```text
[output]
...
collected 1 item

test.py::test_zero_division PASSED                                       [100%]

============================== 1 passed in 0.00s ===============================
```