PEP 751, initiated by the Python team, standardizes package dependencies to ensure reproducible installations for Python applications without requiring users to manually determine dependencies. Core developer Paul Moore states that this is a full approval, aiming for swift implementation. While existing package managers may retain their formats, support for the new TOML standard will be provided. This move addresses complexities caused by varying lock file formats across tools. PEP 751 also includes considerations for source distributions (sdists), which PEP 665 failed to address, promoting better reliability and security during installations.
This specifies the dependencies of packages for an application. This makes installations reproducible without users having to re-determine the dependencies during installation.
PEP 665 was rejected in early 2022 because the community wanted to understand the intention better, leading to issues regarding supporting SDists.
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