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Document bytecode compilation in pip compatibility guide #4195

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Jun 10, 2024
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Document bytecode compilation in pip compatibility guide #4195

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6 changes: 6 additions & 0 deletions PIP_COMPATIBILITY.md
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Expand Up @@ -310,6 +310,12 @@ the package is "allowed" in such cases without building its metadata.
Both pip and uv allow editables requirements to be built and installed even when `--only-binary` is
provided. For example, `uv pip install -e . --only-binary :all:` is allowed.

## Bytecode compilation

Unlike pip, uv does not compile `.py` files to `.pyc` files during installation by default (i.e.,
uv does not create or populate `__pycache__` directories). To enable bytecode compilation
during installs, pass the `--compile-bytecode` flag to `uv pip install` or `uv pip sync`.

## Strictness and spec enforcement

uv tends to be stricter than `pip`, and will often reject packages that `pip` would install.
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