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Learn how to list installed Python modules without version numbers using `pip` commands. Perfect for creating auto-upgraders!
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How to Get Installed Python Modules Without Version Info Using pip

If you're working with Python and using pip for package management, you might have realized that when you run the pip freeze command, it lists your installed packages along with their version numbers. While this is usually helpful, there are situations where you only want the names of the modules—particularly if you’re developing an auto-upgrader for your Python packages. In this guide, we will explore how to achieve this on both Linux/macOS and Windows operating systems.

The Problem

When executing the command:

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

You receive an output like this:

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

However, if you only need the module names without the version info, you could be left wondering how to filter it out efficiently.

The Solution

On Linux / macOS

For users operating on Linux or macOS, you can leverage the power of the command line. Here’s how you can extract just the names of the installed Python modules using the awk command in combination with pip freeze:

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

Explanation:

pip freeze: This command outputs the list of installed packages.

|: The pipe operator takes the output of the command on its left (pip freeze) and uses it as the input for the command on its right (awk).

awk -F "==": This specifies the field separator as ==, meaning that awk will recognize the module name and version as different fields.

{ print $1 }: This prints the first field, which corresponds to the module name.

On Windows

If you are on Windows, awk may not be readily available. Thankfully, there is a straightforward Python-based solution you can use. Just run the following command in your command line terminal:

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

Explanation:

pip freeze: Again, this lists the installed packages.

|: This allows the output of pip freeze to feed into the Python process that follows.

py -c "...": This tells Python to execute the code contained within the quotes.

for p in __import__('sys').stdin: This iterates over each line of input being piped.

print(p.split('=')[0]): This splits each line at the = character and prints the first part, which is the module name.

Conclusion

Now that you know how to extract installed Python modules without including their version numbers on both Linux/macOS and Windows, you can easily create scripts for upgrading those modules without hassle. This simple modification can save you time and help streamline your development workflow—especially when maintaining dependencies in complex projects.

Whether you are building an auto-upgrader or just need a clean list of your packages, these commands will come in handy! Happy coding!