diff options
| author | Jelle Zijlstra <jelle.zijlstra@gmail.com> | 2022-01-12 19:38:25 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-12 19:38:25 (GMT) |
| commit | 0bbf30e2b910bc9c5899134ae9d73a8df968da35 (patch) | |
| tree | c1b8846dd8be0686cea098ea10ce2cf4c4abb2fd /Lib/typing.py | |
| parent | e34c9367f8e0068ca4bcad9fb5c2c1024d02a77d (diff) | |
| download | cpython-0bbf30e2b910bc9c5899134ae9d73a8df968da35.zip cpython-0bbf30e2b910bc9c5899134ae9d73a8df968da35.tar.gz cpython-0bbf30e2b910bc9c5899134ae9d73a8df968da35.tar.bz2 | |
bpo-46342: make @typing.final introspectable (GH-30530)
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
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 |