config.py 文件源码

def test_installed_package_paths(self):
        here = os.path.abspath(os.path.dirname(__file__))
        expected_prefix = os.path.join(here, 'test_apps')
        real_prefix, sys.prefix = sys.prefix, expected_prefix
        installed_path = os.path.join(expected_prefix, 'path')
        sys.path.append(installed_path)
        try:
            import installed_package
            self.assert_equal(installed_package.app.instance_path,
                              os.path.join(expected_prefix, 'var',
                                           'installed_package-instance'))
        finally:
            sys.prefix = real_prefix
            sys.path.remove(installed_path)
            if 'installed_package' in sys.modules:
                del sys.modules['installed_package']