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https://issues.apache.org/jira/browse/BEAM-8152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17424230#comment-17424230
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Valentyn Tymofieiev commented on BEAM-8152:
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To further get a finer grain control of the Python version, if we come back to 
this, I would suggest to try to go with pyenv:
1.  install pyenv, make sure it pyenv is avalialbe and necessary $PATH 
variables are updated 
2. Install necessary desired python interpreters, such as 3.7.0, 3.8.0, 3.9.0, 
3.10.0...
3. make them globally availabe via `pyenv global 3.7.0, 3.8.0, 3.9.0, 3.10.0`
4. Then, create virtual environments within jenkins' workspace folder via: 
python3.x -m venv ...

It would be good to check that this works well with tox.


> Provide a way to better control minor+patch versions of Python 3.x 
> interpreters used to run Beam tests locally and on Jenkins.
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-8152
>                 URL: https://issues.apache.org/jira/browse/BEAM-8152
>             Project: Beam
>          Issue Type: Sub-task
>          Components: sdk-py-core, testing
>            Reporter: Valentyn Tymofieiev
>            Priority: P3
>
> Currently, Beam Python test infrastructure does not provide fine-grained way 
> to control Python interpreter version. The major+minor version are typically 
> selected by virtual environment, and the patch version of interpreter is 
> defined by the version of python package available on machine that is running 
> the tests. 
> For example, Jenkins ubuntu-based machines, use Python 3.5.2 for python 3.5 
> test suites, while debian-based SDK harness containers for Python 3.5 come 
> with Python 3.5.6, and the python3.5 package available on my dev machine is 
> Python 3.5.4. 
> Throughout development of Python 3.5.x, Cpython implementation details that 
> have changed in and these changes affect certain codepaths in Beam, such as 
> type inference. 
>  
> When we encounter such issues, it is difficult for Beam developers to test 
> their changes against a particular patch version of Python interpreter both 
> remotely and locally. Opening this issue to make it simpler.
> cc: [~markflyhigh] [~yifanzou] [~udim] [~altay] who may have opinions and 
> ideas about how to make this simpler.
> Note that there are separate questions: 
>   1) which patch versions of Python we should test against on Jenkins  
>   2) which patch versions of Python Beam should claim to support. 
> Regardless of the answers to those questions, we may want to make it easier 
> for an engineer to run a test suite against a particular patch version of 
> Python, and/or make it easier to switch which patch version is used by 
> Jenkins. 



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