Buck: prebuilt_python_library()
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This is liable to change in the future.

A prebuilt_python_library() rule is used to include prebuilt python packages into the output of a top-level python_binary or python_test rule.

These prebuilt libraries can either be whl files or eggs

whls for most packages are available for download from PyPI. The whl used may be downloaded with remote_file. However, Buck does not attempt to infer dependency information from pip, so that information will have to be imparted by the user.

To create an egg for a package, run python setup.py bdist_egg in the package source distribution.


  • name (required) #

    The short name for this build target.

  • binary_src (required) #

    The path to the .whl or .egg to use. Note: .egg files have a very particular naming convention that must be followed - otherwise pex will not find the dependency properly at runtime!

  • deps (defaults to []) #

    Other prebuilt_python_library() rules which this library depends on. These may also be python_library rules if you want to depend on a source-based copy of the library.

  • exclude_deps_from_merged_linking (defaults to False) #

    When linking the top-level binary with a merged [python].native_link_strategy, do not merge or re-link any native transitive deps of this library. This is useful if this library wraps prebuilt native extensions which cannot be re-linked as part of library merging.

  • visibility (defaults to []) #

    List of build target patterns that identify the build rules that can include this rule as a dependency, for example, by listing it in their deps or exported_deps attributes. For more information, see visibility.

  • licenses (defaults to []) #

    Set of license files for this library. To get the list of license files for a given build rule and all of its dependencies, you can use buck query.

  • labels (defaults to []) #

    Set of arbitrary strings which allow you to annotate a build rule with tags that can be searched for over an entire dependency tree using buck query attrfilter().


# A simple prebuilt_python_library with no external dependencies.
  name = "requests-download",
  url = "https://files.pythonhosted.org/packages/51/bd/23c926cd341ea6b7dd0b2a00aba99ae0f828be89d72b2190f27c11d4b7fb/requests-2.22.0-py2.py3-none-any.whl",
  sha1 = "e1fc28120002395fe1f2da9aacea4e15a449d9ee",
  out = "requests-2.22.0-py2.py3-none-any.whl",

  name = "requests",
  binary_src = ":requests-download",

# A slightly more complex example
  name = "greenlet",
  binary_src = "greenlet-0.4.7-py2.7-macosx-10.10-x86_64.egg",

  name = "gevent",
  binary_src = "gevent-1.0.2-py2.7-macosx-10.10-x86_64.egg",
  deps = [