def get_installed_pypackages():
    return {p.project_name.lower(): p for p in pkg_resources.working_set}
def _split(self, path):
        if "/" in path:
            subdir, rest = path.split("/", 1)
        else:
            subdir, rest = path, ""
        if not subdir:
            raise error.ProgrammingError("path cannot be absolute")
        return subdir, rest