diff options
Diffstat (limited to 'Lib/typing.py')
| -rw-r--r-- | Lib/typing.py | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Lib/typing.py b/Lib/typing.py index d520f6b..972b8ba 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -2042,8 +2042,17 @@ def final(f): class Other(Leaf): # Error reported by type checker ... - There is no runtime checking of these properties. + There is no runtime checking of these properties. The decorator + sets the ``__final__`` attribute to ``True`` on the decorated object + to allow runtime introspection. """ + try: + f.__final__ = True + except (AttributeError, TypeError): + # Skip the attribute silently if it is not writable. + # AttributeError happens if the object has __slots__ or a + # read-only property, TypeError if it's a builtin class. + pass return f |