Solving the ModuleNotFoundError Issue in Colab after Upgrading to Python 3.9

Discover how to resolve package import problems in Google Colab when upgrading to Python 3.9 with our easy step-by-step guide.
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Introduction

If you've been working with Google Colab, you know how convenient it is for running Python code online. However, as the Python ecosystem evolves, you might encounter compatibility issues when trying to use packages that require a newer version of Python. A common scenario arises when you try to use a package that requires Python 3.9, but Colab, by default, runs on Python 3.7. This guide aims to address the issue of ModuleNotFoundError when importing packages after Python version updates in Colab and provide a workaround to get your code running smoothly.

Understanding the Problem

Colab natively supports Python 3.7, so when you attempt to install a package that requires Python 3.9, it might seem straightforward to upgrade the Python version. However, this can lead to an ImportError because Colab continues looking for packages in the older Python installation’s library directory. The following command will usually trigger the error:

[[See Video to Reveal this Text or Code Snippet]]

The error generated will look something like:

[[See Video to Reveal this Text or Code Snippet]]

This occurs because Colab is searching for the package in /usr/local/lib/python3.7/dist-packages/, rather than the expected directory for Python 3.9.

Solution: A Workaround to Fix the Import Issue

While the direct approach of installing Python 3.9 in Colab can be troublesome, there is a workaround that might help you load your packages successfully. Below is a detailed breakdown of steps to follow:

Step 1: Import Required Libraries

You should start by importing the sys library which allows you to manipulate Python's runtime environment.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the System Path

Add the path to the dist-packages directory for the upgraded Python version. By doing this, you're telling Python where to look for the packages installed under Python 3.9:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Install Your Package

If you haven’t done so already, ensure that your package is installed using pip for Python 3.9:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Test Your Setup

Now, you should be able to import your package without encountering the ModuleNotFoundError. Simply run:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Although upgrading Python in Google Colab can lead to some challenges, using the aforementioned workaround can help you successfully import your desired packages. While it may not be the cleanest solution, it allows you to continue working on your projects without major disruptions. Remember that the Python community can be a valuable resource; don't hesitate to seek advice or share your experiences with others who might face similar hurdles.

If you have any further questions or encounter issues, feel free to connect with the community, and happy coding in Colab!