[Feature Request]: Improve failure message when passing Pipeline object / PBegin objects

[hjtran]

What would you like to happen?

The failure message for passing a pipeline object to a transform that expects a PCollection doesn't point a user to the underlying issue at all

  with beam.Pipeline() as pipeline:
    _ = (
        pipeline
        | beam.Map(print))

Results in:

...
 File "/usr/local/lib/python3.10/site-packages/apache_beam/runners/pipeline_context.py", line 95, in get_id
    self._id_to_proto[id] = obj.to_runner_api(self._pipeline_context)
  File "/usr/local/lib/python3.10/site-packages/apache_beam/pvalue.py", line 187, in to_runner_api
    self.windowing))
  File "/usr/local/lib/python3.10/site-packages/apache_beam/pvalue.py", line 158, in windowing
    self._windowing = self.producer.transform.get_windowing(
  File "/usr/local/lib/python3.10/site-packages/apache_beam/transforms/ptransform.py", line 563, in get_windowing
    return inputs[0].windowing
AttributeError: 'PBegin' object has no attribute 'windowing'

Issue Priority

Priority: 2 (default / most feature requests should be filed as P2)

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[hjtran]

Actually, the posted exception was from Beam playground.
https://play.beam.apache.org/?sdk=python&shared=p_86mcWNIcD

I think there is a similarly confusing traceback even outside of beam playground

[ahmedabu98]

cc @tvalentyn

[TanuSharma2511]

.take-issue