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A resolver implementation for generating and interacting with Pipenv-compatible Lockfiles.

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Install from PyPI:

$ pipenv install passa

Install from GitHub:

$ pipenv install -e git+


Passa is a toolset for performing tasks in a Pipfile project, designed to be used as a backing component of Pipenv. It contains several components:

  • A resolver designed for performing dependency resolution using a stateful look-forward algorithm to resolve dependencies (backed by ResolveLib).

  • Interface to interact with individual requirement specifications inside Pipfile and Pipfile.lock (backed by RequirementsLib).

  • A command line interface to invoke the above operations.

Read the documentation.

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