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Pip is "a proper dependency resolver". It just perhaps doesn't have the best heuristics for performance, but they're working on that. What pip isn't is a workflow tool for developers, or "project manager" (terminology uv uses in its marketing; "package manager" seems to be not well enough defined to argue about). Pip doesn't install Python, create or manage virtual environments (or real ones for the separately installed Python versions), upload your packages to PyPI, view a lockfile as a way to keep track of an environment (although they have just added experimental support for creating PEP 751 lockfiles and are planning support for installing from them), do one-off runs of Python applications (by installing them in an ephemeral environment, possibly installing PEP 723 inline-specified dependencies), define or manage "workspaces", have its own `[tool.pip]` section in pyproject.toml, or possibly other things I forgot. But it absolutely does determine the dependencies of the packages you're currently asking to install, transitively, attempt to figure out a compatible set of versions, and figure out which actual build artifacts to use (i.e., "resolve dependencies"). Its logic for doing so has even been extracted and made available as the `resolvelib` package (https://pypi.org/project/resolvelib/). My own project, PAPER, is scoped to fix pip's problems and also do basic environment management (so as to install applications or do temporary runs). The point is to satisfy the needs of Python users, while not explicitly catering to developers. (I'll probably separately offer some useful developer scripts that leverage the functionality.) I also, incidentally, intend to allow for this sort of prompt during the install procedure. (Although the planned default is to refuse sdists entirely.) |