# Build file generation with Gazelle This example shows a project that has Gazelle setup with the rules_python extension, so that targets like `py_library` and `py_binary` can be automatically created just by running ```sh bazel run //:requirements.update bazel run //:gazelle_python_manifest.update bazel run //:gazelle ``` As a demo, try creating a `__main__.py` file in this directory, then re-run that gazelle command. You'll see that a `py_binary` target is created in the `BUILD` file. Or, try importing the `requests` library in `__init__.py`. You'll see that `deps = ["@pip//pypi__requests"]` is automatically added to the `py_library` target in the `BUILD` file. For more information on the behavior of the rules_python gazelle extension, see the README.md file in the /gazelle folder.