How Can You Automate the Generation of a `requirements.txt` File from Python Source Code?

Automating Requirements.txt Generation from Python Source Code

Manually creating a requirements.txt file can be a tedious task, especially when working with external Python source code that lacks one. To address this challenge, let's explore an automated solution to generate a requirements.txt file directly from the import section.

Solution:

Fortunately, the Python Package Index (PyPI) offers a tool called pipreqs that seamlessly extracts dependencies from Python source code. Here's how you can use it:

1. Install pipreqs:

   pip install pipreqs

2. Run pipreqs:
   Execute the pipreqs command on the Python source code directory:

   pipreqs /path/to/project

This command will create a requirements.txt file in the specified directory.

Advantages of pipreqs:

In contrast to the traditional pip freeze command, pipreqs offers several benefits:

• Selective Dependency Collection: pipreqs only extracts dependencies that are imported in the Python code, excluding those installed globally or via other methods.
• Exclusion of Unrelated Packages: pipreqs avoids including packages that are not directly used in the project, reducing package bloat in the requirements.txt file.
• Offline Generation: pipreqs can generate requirements.txt even without an active internet connection, making it convenient for offline development or cloning projects from VCS.

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