Replit officially supports pip

Replit now officially supports pip, the Python package management tool. Now, when importing an existing repository from GitHub, you can use pip immediately without any separate configuration.

Developers who were using poetry can easily switch over by deleting poetry.lock and moving the dependencies from pyproject.toml into requirements.txt. (For example, flask = "^3.0.2" is converted to flask>=3.0.2,<4)

Until now, Replit had used poetry as its default package manager, but when developers installed packages with pip by following guides from AI or StackOverflow, the dependencies weren't recorded, causing a ModuleNotFoundError during deployment.

To solve this, Replit built a pip backend based on UPM (Universal Package Manager). It implemented a requirements.txt parser that complies with standards such as PEP-423, PEP-440, and PEP-508 to ensure stability.

In particular, instead of the pip freeze approach that records all packages, it was designed to selectively record only the packages that were just installed. This prevents the dependency list from becoming unnecessarily complex and makes future package upgrades easier.

Going forward, Replit plans to integrate more package managers into UPM and continue strengthening interoperability with the Python ecosystem, including developing a migration tool from requirements.txt to pyproject.toml.