---
title: Python modules available to indexing pipeline extensions
slug: '116'
canonical_url: https://docs.coveo.com/en/116/
collection: index-content
source_format: adoc
---
# Python modules available to indexing pipeline extensions
A large number of modules are available for import in [indexing pipeline extension (IPE)](https://docs.coveo.com/en/206/) scripts.
The following Python 3 modules may be especially useful:

> **Note**
>
> This list is maintained manually, and might therefore be slightly out of date (for example, new modules may have been added, or existing modules may have been updated to a newer version since the last edit).
> Last updated: July 2023.
> 
> You should validate the complete list of modules and their versions programmatically (see [Listing available modules programmatically](#listing-available-modules-programmatically)).

* Modules from the [Python 3 Standard Library](https://docs.python.org/3/library/).

* [`beautifulsoup4`](https://pypi.org/project/beautifulsoup4/): A Python library for pulling data out of HTML and XML files.

* [`boto3`](https://pypi.org/project/boto3/): Amazon Web Services (AWS) Software Development Kit (SDK) for Python.

* [`cryptography`](https://pypi.org/project/cryptography/2.2.2/): A cryptographic library.

* [`lxml`](https://lxml.de/index.html): Feature-rich and easy-to-use library for processing XML and HTML.

* [`markdown`](https://github.com/Python-Markdown/markdown): A text-to-HTML conversion library.

* [`python-dateutil`](https://pypi.python.org/pypi/python-dateutil/): Provides powerful extensions to the datetime module.

* [`requests`](https://pypi.python.org/pypi/requests/): HTTP library for Python.

* [`urllib3`](https://urllib3.readthedocs.io/): An HTTP client.

## Listing available modules programmatically

To get a log message containing the current, exhaustive, up-to-date list of all Python 3 modules/versions available for import in any given Python 3 indexing pipeline extension script, you can run a Python 3 indexing pipeline extension that has the following script:

```python
import pkg_resources
modules = pkg_resources.working_set
modules_list = sorted(["%s, version %s" % (i.project_name, i.version) for i in modules])
log(str(modules_list))
```

## Getting the Python version programmatically

To get a log message containing the current Python version used for indexing pipeline extensions, you can run or test an indexing pipeline extension that has the following script:

```python
import sys
myPythonVersion = sys.version_info
log(str(myPythonVersion))
```

## Deprecation of `time.sleep`

Do not use `time.sleep` in extensions to delay outgoing requests.
Doing so introduces idle delays, and since index pipeline extensions are a multi-tenant service, it leads to processing time issues.

The use of `time.sleep` in extensions will be completely deprecated in the future.

## Suggesting support for new modules

If you would like to use a Python module which isn't currently supported by indexing pipeline extensions, you can suggest the addition by posting an idea on [Coveo Connect (Ideas tab)](https://connect.coveo.com/s/ideas).