XD-DENG opened a new pull request #13449:
URL: https://github.com/apache/airflow/pull/13449


   - Change-1: Use `getattr()` instead of __dict__ as __dict__ doesn't return 
correct values for properties (sample code reproducing the issue is given 
below). This was fixed for `dag` model, but was not fixed for `baseoperator` 
model.
   
   - Change-2: Avoid unnecessary condition check (the removed condition checks 
are covered by `_comps`)
   - Change-3: Use "==" rather than "is" to compare types (both work, but for 
more consistent usage)
   
   
   #### Sample Code Reproducing Issue in Change-1
   
   ```python
   class C:
   
       def __init__(self, elements):
           self._elements = elements
   
       @property
       def elements(self):
           return self._elements
   
       def test(self):
           print(self.__dict__.get("elements", None))
           print(getattr(self, "elements", None))
   
   a = C([1,2,3])
   a.test()
   ```
    Output:
   
   ```
   None
   [1, 2, 3]
   ```
   
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