[GitHub] [spark] dongjoon-hyun commented on a change in pull request #26824: [SPARK-30197][PYSPARK] Add minimum `requirements.txt` file to `python` directory

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dongjoon-hyun commented on a change in pull request #26824: [SPARK-30197][PYSPARK] Add minimum `requirements.txt` file to `python` directory
URL: https://github.com/apache/spark/pull/26824#discussion_r355820626
 
 

 ##########
 File path: python/requirements.txt
 ##########
 @@ -0,0 +1,4 @@
+numpy==1.16.4
+scipy==1.2.2
 
 Review comment:
   According to the UT, something doesn't work without these. 
   The file itself is just a conventional file for `pip`. Users can setup easily with `pip install -r python/requirements.txt`.
   
   If we use `==`, all mismatched versions (both lower and higher) will be removed and reinstalled with the exact versions.

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