packaging.py 文件源码

def pre_run(self):
        self.egg_name = pkg_resources.safe_name(self.distribution.get_name())
        self.egg_info = "%s.egg-info" % pkg_resources.to_filename(
            self.egg_name)
        if (not os.path.exists(self.egg_info) or
                _newer_requires_files(self.egg_info)):
            ei_cmd = self.get_finalized_command('egg_info')
            ei_cmd.run()
            self.install_test_requirements()
            _copy_test_requires_to(self.egg_info)