test_resources.py 文件源码

def setUp(self):
        self._ns_pkgs = pkg_resources._namespace_packages.copy()
        self._tmpdir = tempfile.mkdtemp(prefix="tests-setuptools-")
        os.makedirs(os.path.join(self._tmpdir, "site-pkgs"))
        self._prev_sys_path = sys.path[:]
        sys.path.append(os.path.join(self._tmpdir, "site-pkgs"))