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Struggling to change your Python version in PyCharm without losing your packages? Learn how to upgrade from Python 3.6 to 3.7 seamlessly with our step-by-step guide!
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How to Upgrade Python in PyCharm's venv from 3.6 to 3.7 Without Starting Over

Upgrading your Python version in PyCharm while preserving your existing packages can be a challenge, especially if you're used to the convenience of your current setup. If you've been using a virtual environment (venv) with Python 3.6 and are looking to upgrade to Python 3.7, you may be wondering if there's a shortcut that allows you to change the interpreter without starting from scratch.

In this guide, we will walk you through the process of moving from Python 3.6 to Python 3.7 in your PyCharm project while keeping all your packages intact. Unfortunately, directly changing the Python version in a virtual environment isn't feasible, but we have an easy workaround for you. Let’s dive into it!

The Challenge of Changing Python Versions

When using venv in PyCharm, changing the Python interpreter isn't as simple as flipping a switch. Python virtual environments are tied to the version of Python that was used to create them. Thus, to switch from 3.6 to 3.7, you will need to take a few systematic steps. Here's a brief overview of what you need to do:

Export your current packages.

Create a new virtual environment with Python 3.7.

Import your packages into the new environment.

Step-by-Step Guide

Follow these steps to seamlessly upgrade your virtual environment from Python 3.6 to 3.7:

1. Export Current Packages

First, you'll want to generate a list of all installed packages in your current environment. This can be done by activating your existing virtual environment and running a simple command:

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

Explanation: The pip freeze command lists all the packages and their versions currently installed in your environment. The output is redirected to a file named requirements.txt. You can name this file anything you like — the name is not critical.

2. Create a New Virtual Environment

Next, you'll need to create a new virtual environment, but this time with Python 3.7. You can do this through the command line or via PyCharm's interface. To create it from the command line, use the following:

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

Important Note: Make sure to replace /path/to/new-venv with your desired path for the new virtual environment.

3. Activate the New Environment

Once the new environment is created, activate it. If you are using a Unix-based system, run:

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

For Windows users, the command is slightly different:

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

4. Install Packages in New Environment

With your new Python 3.7 environment activated, it's time to install the packages you previously exported. Run the following command:

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

This command tells pip to install all packages listed in requirements.txt, ensuring that your new environment mimics your previous one.

Conclusion

While you cannot directly change the Python version of an existing virtual environment in PyCharm, you can smoothly transition to a new version by exporting your packages, creating a new virtual environment, and then reinstalling those packages. By following the steps outlined above, you'll be able to upgrade from Python 3.6 to 3.7 without the hassle of starting all over again.

Now, go ahead and enjoy the new features and improvements that come with Python 3.7! If you have any questions or run into any issues during the upgrade process, feel free to leave a comment below.