How do I resolve a Pickling Error on class apache_beam.internal.clients.dataflow.dataflow_v1b3_messages.TypeValueValuesEnum?
<p>A PicklingError is raised when I run my data pipeline remotely: the data pipeline has been written using the Beam SDK for Python and I am running it on top of Google Cloud Dataflow. The pipeline works fine when I run it locally. </p>

<p>The following code generates the PicklingError: this ought to reproduce the problem</p>

<pre><code>import apache_beam as beam
from apache_beam.transforms import pvalue
from apache_beam.io.fileio import _CompressionType
from apache_beam.utils.options import PipelineOptions
from apache_beam.utils.options import GoogleCloudOptions
from apache_beam.utils.options import SetupOptions
from apache_beam.utils.options import StandardOptions

if __name__ == "__main__":
  pipeline_options = PipelineOptions()
  pipeline_options.view_as(StandardOptions).runner = 'BlockingDataflowPipelineRunner'
  pipeline_options.view_as(SetupOptions).save_main_session = True
  google_cloud_options = pipeline_options.view_as(GoogleCloudOptions)
  google_cloud_options.project = "project-name"
  google_cloud_options.job_name = "job-name"
  google_cloud_options.staging_location = 'gs://path/to/bucket/staging'
  google_cloud_options.temp_location = 'gs://path/to/bucket/temp'
  p = beam.Pipeline(options=pipeline_options)
  p.run()
</code></pre>

<p>Below is a sample from the beginning and the end of the Traceback:</p>

<pre><code>WARNING: Could not acquire lock C:\Users\ghousains\AppData\Roaming\gcloud\credentials.lock in 0 seconds
WARNING: The credentials file (C:\Users\ghousains\AppData\Roaming\gcloud\credentials) is not writable. Opening in read-only mode. Any refreshed credentials will only be valid for this run.
Traceback (most recent call last):
  File "formatter_debug.py", line 133, in &lt;module&gt;
    p.run()
  File "C:\Miniconda3\envs\beam\lib\site-packages\apache_beam\pipeline.py", line 159, in run
    return self.runner.run(self)
    ....
    ....
    ....
  File "C:\Miniconda3\envs\beam\lib\sitepackages\apache_beam\runners\dataflow_runner.py", line 172, in run
    self.dataflow_client.create_job(self.job))    
  StockPickler.save_global(pickler, obj)
  File "C:\Miniconda3\envs\beam\lib\pickle.py", line 754, in save_global (obj, module, name)) 
  pickle.PicklingError: Can't pickle &lt;class 'apache_beam.internal.clients.dataflow.dataflow_v1b3_messages.TypeValueValuesEnum'&gt;: it's not found as apache_beam.internal.clients.dataflow.dataflow_v1b3_messages.TypeValueValuesEnum
</code></pre>