Charles Chen created BEAM-9277:
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             Summary: Beam 2.19 raises exception in IPython notebook
                 Key: BEAM-9277
                 URL: https://issues.apache.org/jira/browse/BEAM-9277
             Project: Beam
          Issue Type: Bug
          Components: sdk-py-core
            Reporter: Charles Chen
            Assignee: Charles Chen


Beam 2.19 causes the following error to occur in an IPython notebook:

{{/usr/local/lib/python3.6/dist-packages/apache_beam/utils/interactive_utils.py 
in alter_label_if_ipython(transform, pvalueish)
     82                       'ipython prompt metadata. Cannot figure out the 
pipeline '
     83                       'that the given pvalueish %s belongs to. Thus 
noop.'
---> 84                       % pvalueish)
     85     if (pipeline
     86         # We only alter for transforms to be applied to user-defined 
pipelines

TypeError: not all arguments converted during string formatting}}

The fix should be that the formatter should pass "% (pvalueish,)" instead of 
the possible tuple.



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