diff options
Diffstat (limited to 'Lib/dataclasses.py')
| -rw-r--r-- | Lib/dataclasses.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py index 96bf6e1df4..ad7bf0f759 100644 --- a/Lib/dataclasses.py +++ b/Lib/dataclasses.py @@ -1173,6 +1173,9 @@ def replace(obj, **changes): continue if f.name not in changes: + if f._field_type is _FIELD_INITVAR: + raise ValueError(f"InitVar {f.name!r} " + 'must be specified with replace()') changes[f.name] = getattr(obj, f.name) # Create the new object, which calls __init__() and |