How to Resolve ModuleNotFoundError: No module named '_lzma' on Ubuntu 22.04 with Python

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Summary: Encountering `ModuleNotFoundError: No module named '_lzma'` on Ubuntu 22.04 while using Python? Follow this guide to fix the error efficiently.
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How to Resolve ModuleNotFoundError: No module named '_lzma' on Ubuntu 22.04 with Python

When working with Python on Ubuntu 22.04, you might encounter an issue where a module named _lzma is not found. This error typically arises when you are trying to import the lzma module, an essential module for handling XZ-compressed files. This guide will guide you through the steps to resolve this issue.

Understanding the Error

The error message you may encounter looks like this:

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This indicates that Python is unable to locate the _lzma module, which is required for the lzma library to function correctly. This usually happens because the _lzma module is missing from your Python installation.

Why Does This Happen?

Ubuntu 22.04 might not have the required development libraries installed by default, which prevents the _lzma module from being built when Python was installed. Fortunately, this can be fixed by installing the necessary libraries and recompiling Python.

Steps to Fix the Issue

Step 1: Install the Required System Dependencies

First, make sure that the liblzma-dev package is installed on your system. This package provides the development files needed for incorporating lzma support in Python.

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Step 2: Rebuild Python

The next step involves recompiling Python to include the _lzma module. Depending on how you initially installed Python, the steps may vary slightly.

For Python Installed via Source Code

If you installed Python manually by compiling the source code, you need to recompile Python after ensuring liblzma-dev is installed. Here is a simplified version of the steps you might take:

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For Python Installed via pyenv

If you used pyenv to manage multiple Python versions, you need to reinstall the specific Python version like so:

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Step 3: Verify the Installation

After rebuilding Python, you should verify that the _lzma module is available. Open a Python interactive shell and try importing the lzma module:

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If you don't see any errors, then the issue has been resolved.

Optional: Using pylzma

As an alternative, you can use the third-party pylzma library if rebuilding Python is not feasible for your scenario. This library provides lzma support independently. You can install it using pip:

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Note that pylzma is not a drop-in replacement for the built-in lzma module, and you may need to adjust your code accordingly.

Conclusion

Resolving the ModuleNotFoundError: No module named '_lzma' error on Ubuntu 22.04 generally involves installing the missing system dependencies and recompiling Python. By following the steps outlined in this guide, you should be able to restore the lzma functionality in your Python environment, allowing you to handle XZ-compressed files seamlessly.

Happy coding!

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How to Resolve ModuleNotFoundError: No module named '_lzma' on Ubuntu 22.04 with Python?, No module named '_lzma', pylzma, python