potiuk commented on a change in pull request #20019:
URL: https://github.com/apache/airflow/pull/20019#discussion_r762080010
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File path: airflow/models/param.py
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@@ -99,16 +99,17 @@ def has_value(self) -> bool:
return not isinstance(self.value, NoValueSentinel)
-class ParamsDict(dict):
+class ParamsDict(MutableMapping):
"""
Class to hold all params for dags or tasks. All the keys are strictly
string and values
are converted into Param's object if they are not already. This class is
to replace param's
dictionary implicitly and ideally not needed to be used directly.
"""
+ __slots__ = ['__dict__', 'supresss_exception']
Review comment:
> Without a `__dict__` variable, instances cannot be assigned new
variables not listed in the `__slots__` definition. Attempts to assign to an
unlisted variable name raises AttributeError. If dynamic assignment of new
variables is desired, then add `'__dict__'` to the sequence of strings in the
`__slots__` declaration.
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