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https://issues.apache.org/jira/browse/BEAM-3343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16302794#comment-16302794
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David Sabater commented on BEAM-3343:
-------------------------------------

In case it helps.
I had the same issue after the fix adding the upper bound in Protobuf.
I solved the issue in my local environment by downgrading Protobuf installed in 
my virtualenv from 3.5 to 3.4.


Kind regards.

> beam_PostCommit_Python_Verify fails due to "ImportError: cannot import name 
> coder_impl"
> ---------------------------------------------------------------------------------------
>
>                 Key: BEAM-3343
>                 URL: https://issues.apache.org/jira/browse/BEAM-3343
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Chamikara Jayalath
>            Assignee: Robert Bradshaw
>            Priority: Critical
>             Fix For: Not applicable
>
>
> First occurred for pull request https://github.com/apache/beam/pull/4220
> https://builds.apache.org/job/beam_PostCommit_Python_Verify/3723/console
> Robert, can you take a look ?



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