# Python Sites

This linter verifies that {searchfox}`python site <python/sites/>` files are
following the best practices.

## Redundant Specifications

If a dependency is specified in the {searchfox}`mach site <python/sites/>`, it
does not need to be specified in any command site (eg: `build.txt`, `common.txt`, etc).

This check warns against these redundant specifications, and can also fix them.

## Specification Ordering

The first line of any site file should start with `require-python:`. All subsequent lines
should be sorted alphabetically. This check ensures that's the case, and can fix the ordering
for you, while still maintaining comment block association.

## Run Locally

This mozlint linter can be run using mach:

```{eval-rst}
.. parsed-literal::

    $ mach lint --linter python-sites <file paths>
```

## Configuration

This linter is enabled by default, and will run if you make changes to site files.

## Sources

- {searchfox}`Configuration (YAML) <tools/lint/python-sites.yml>`
- {searchfox}`Source <tools/lint/python-sites/__init__.py>`