配合getattr()、setattr()以及hasattr(),我们可以直接操作一个对象的状态 如果试图获取不存在的属性,会抛出AttributeError的错误 可以传入一个default参数,如果属性不存在,就返回默认值 getattr(obj, 'z', 404) # 获取属性'z',如果不存在,返回默认值404 404 1. 2. 使用__slots__ 为了达到限制的目的,Python允许...
姓名:{{ current_user.nickname }} 编辑 File “C:\Users\a1235\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2\environment.py”, line 471, in getattr return getattr(obj, attribute) jinja2.exceptions.UndefinedError: ‘current_user’ is undefined The debugger caught an exception in ...
__getattr__(self, name) 当用户试图访问一个根本不存在(或者暂时不存在)的属性时,你可以通过这个魔法方法来定义类的行为。这个可以用于捕捉错误的拼写并且给出指引,使用废弃属性时给出警告(如果你愿意,仍然可以计算并且返回该属性),以及灵活地处理AttributeError。只有当试图访问不存在的属性时它才会被调用,所以这不...
check_access( obj=getattr(obj, parent_accessor), permissions=permissions, user=user ) except AttributeError: # Has no such attribute, try it as a related field try: return self.check_access( obj=return_related( instance=obj, related_field=parent_accessor ), permissions=permissions, user=user ...
@@ -316,7 +316,8 @@ def _get_value_for_key(key, obj, default): return obj[key] except (KeyError, AttributeError, IndexError, TypeError): try: return getattr(obj, key) attr = getattr(obj, key) return attr() if callable(attr) else attr except AttributeError: return default return ...
pop() obj = self for entry in args: obj = getattr(obj, entry) setattr(obj, final, val) Example #11Source File: kube_config_test.py From python-base with Apache License 2.0 6 votes def test_oidc_with_refresh(self, mock_ApiClient, mock_OAuth2Session): mock_response = mock.MagicMock...