TheNeuralBit commented on pull request #13681:
URL: https://github.com/apache/beam/pull/13681#issuecomment-756403640


   Python PreCommit failures may be a regression in pandas? It looks like 
they're all in py37-cython, and all related to accessing columns as attributes. 
For example: 
   
   ```
         small = pd.DataFrame({'label': ['11a', '37a', '389a'], 'rank': [0, 1, 
2]})
         big = pd.DataFrame({'number': list(range(1000))})
   >     big['float'] = big.number.map(math.sqrt)
   E     AttributeError: 'DataFrame' object has no attribute 'number'
   ```


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