Python is usually installed system-wide by users. Multiple Project with Different Versions of Dependencies So you can have the latest versions of dependencies and sub-dependencies as long as they don't introduce any breaking changes. Here comes Pipenv! Pipenv relives you from manually updating the versions of sub-dependencies but in the same time allows you to have deterministic versions of your project's dependencies. Now that you’ve pinned the exact versions of every dependency that your project use, you need also to update these versions, manually, when it's necessary especially for patching any discovered security issues that don't have any breaking changes. In one way, Yes but this will results in other issues.īy pinning your project dependencies, you make sure you your project doesn't break when it's deployed on a production machine. Now, doesn't that solve our earlier issues? Now, how to replicate the same environment in your production environment? You can, actually, use pip freeze > requirements.txt which will produce a requirements file will all dependencies and the exact versions used in your development environment.

You may think this is going to solve your issues but is that true? Not always, because even if the requirements are determined, these packages have other dependencies which Pip will install too and if their versions are not pinned then you ended up installing the latest versions of the dependencies of your project's dependencies which may have breaking changes. You can solve the issue by adding versions (or pinning requirements) so Pip will install the same versions in production: This may present some problems if the newer versions have breaking changes.

Now, imagine that you are using this requirements file for a production environment after a while in development. We didn't specify the required versions which will install the latest versions of the wanted packages. Each line contains a dependency that Pip will install, either globally or in a virtual environment if it's activated.

Project XSTING instal the new