Add __repr__ to ParamsDict class (apache#25305)

airflow/models/param.py

@@ -147,6 +147,9 @@ def __delitem__(self, v: str) -> None:
     def __iter__(self):
         return iter(self.__dict)
 
+    def __repr__(self):
+        return repr(self.dump())
+
     def __setitem__(self, key: str, value: Any) -> None:
         """
         Override for dictionary's ``setitem`` method. This method make sure that all values are of

tests/models/test_param.py

@@ -193,6 +193,10 @@ def test_update(self):
         with pytest.raises(ParamValidationError, match=r'Invalid input for param key: 1 is not'):
             pd.update({'key': 1})
 
+    def test_repr(self):
+        pd = ParamsDict({'key': Param('value', type='string')})
+        assert repr(pd) == "{'key': 'value'}"
+
 
 class TestDagParamRuntime:
     VALUE = 42