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https://issues.apache.org/jira/browse/PYLUCENE-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17492229#comment-17492229
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Andi Vajda commented on PYLUCENE-62:
------------------------------------

I took a look at your patch and attached a version that should be less 
intrusive and work, hopefully, too:
  - you do not need to add windows.py to modules, it is already included and 
installed
  - you do need to keep code conditional to windows, you can't assume people 
are not
    going to carry code around between machines
  - in windows.py, I renamed get_jvm_dll_directory() to 
get_jvm_dll_directory_from_registry()
   and otherwise kept it unchanged
  - in windows.py, I added get_jvm_dll_directory_from_env() based on your code.
  - in windows.py, I also changed add_jvm_dll_directory_to_path() to do the 
right thing, like
    you did
  - I changed the --find-jvm-dll command line flag from a boolean to a string 
that must be one
    of "client" or "server" and made it default to "client" for python >= 3.8, 
None otherwise.
Please, try the attached patch out by passing it --find-jvm-dll client (or 
server), I have no access to Windows, so I could not try it out myself. I 
verified that it didn't break on Mac.
Thank you !


> Not finding jvm.dll on windows
> ------------------------------
>
>                 Key: PYLUCENE-62
>                 URL: https://issues.apache.org/jira/browse/PYLUCENE-62
>             Project: PyLucene
>          Issue Type: Bug
>            Reporter: Petrus Hyvönen
>            Priority: Major
>         Attachments: add_dll_win-1.patch, add_dll_win.patch, jvm_dll.diff
>
>
> On recent versions of Python, the dll's seems to require to be added via the 
> os.add_dll_directory() function.
>  
> Apparently something changed in Python 3.8 regarding this, "Python 3.8 
> changed the DLL resolution order 
> [https://docs.python.org/3/whatsnew/3.8.html#bpo-36085-whatsnew]";
> Thanks to:
> [https://github.com/conda-forge/python-feedstock/issues/552]
>  
> Proposed fix in a patch below. It can likely be rewritten in some more neat 
> way. :)



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