---
title: "pure_eval"
description: "Learn about pure_eval and how to add it to your integrations list."
url: https://docs.sentry.io/platforms/python/integrations/pure_eval/
---

# pure\_eval for Python

This integration uses [`pure_eval`](https://github.com/alexmojaki/pure_eval) to safely evaluate additional expressions in the source code and display their values alongside other local variables.

## [Install](https://docs.sentry.io/platforms/python/integrations/pure_eval.md#install)

Install `sentry-sdk` from PyPI with the `pure_eval` extra or `pip install pure_eval executing asttokens`.

```bash
pip install "sentry-sdk[pure_eval]"
```

*Other available variations of the above snippet: uv*

## [Configure](https://docs.sentry.io/platforms/python/integrations/pure_eval.md#configure)

Add `PureEvalIntegration()` to your `integrations` list:

```python
import sentry_sdk
from sentry_sdk.integrations.pure_eval import PureEvalIntegration

sentry_sdk.init(
    dns="https://<key>@o<orgId>.ingest.sentry.io/<projectId>",
    # Add data like request headers and IP for users, if applicable;
    # see https://docs.sentry.io/platforms/python/data-management/data-collected/ for more info
    send_default_pii=True,
    integrations=[
        PureEvalIntegration(),
    ],
)
```

## [Verify](https://docs.sentry.io/platforms/python/integrations/pure_eval.md#verify)

```python
from types import SimpleNamespace

def main():
    sentry_sdk.init(...)  # same as above

    namespace = SimpleNamespace()
    namespace.d = {1: 2}
    print(namespace.d[1] / 0)

main()
```

When you run this example script an error will be sent to Sentry. Through the `PureEvalIntegration` the stack trace of the error will include the values of `namespace.d` and `namespace.d[1]` which would not be shown without `PureEvalIntegration`.

## [Supported Versions](https://docs.sentry.io/platforms/python/integrations/pure_eval.md#supported-versions)

* Python:

  * 3.6+ (SDK <3.0)
  * 3.7+ (SDK 3.0+)

If you're looking to use Sentry with older Python or framework versions, consider using an older major version of the SDK. The minimum versions for each major version are listed above.