# concrete.ml.common.debugging.custom\_assert.md

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## module `concrete.ml.common.debugging.custom_assert`

Provide some variants of assert.

***

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### function `assert_true`

```python
assert_true(
    condition: bool,
    on_error_msg: str = '',
    error_type: Type[Exception] = <class 'AssertionError'>
)
```

Provide a custom assert to check that the condition is True.

**Args:**

* `condition` (bool): the condition. If False, raise AssertionError
* `on_error_msg` (str): optional message for precising the error, in case of error
* `error_type` (Type\[Exception]): the type of error to raise, if condition is not fulfilled. Default to AssertionError

***

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### function `assert_false`

```python
assert_false(
    condition: bool,
    on_error_msg: str = '',
    error_type: Type[Exception] = <class 'AssertionError'>
)
```

Provide a custom assert to check that the condition is False.

**Args:**

* `condition` (bool): the condition. If True, raise AssertionError
* `on_error_msg` (str): optional message for precising the error, in case of error
* `error_type` (Type\[Exception]): the type of error to raise, if condition is not fulfilled. Default to AssertionError

***

[![](https://img.shields.io/badge/-source-cccccc?style=flat-square)](https://github.com/zama-ai/concrete-ml/blob/release/1.1.x/src/concrete/ml/common/debugging/custom_assert.py#L58)

### function `assert_not_reached`

```python
assert_not_reached(
    on_error_msg: str,
    error_type: Type[Exception] = <class 'AssertionError'>
)
```

Provide a custom assert to check that a piece of code is never reached.

**Args:**

* `on_error_msg` (str): message for precising the error
* `error_type` (Type\[Exception]): the type of error to raise, if condition is not fulfilled. Default to AssertionError


---

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