HyukjinKwon commented on a change in pull request #27928:
URL: https://github.com/apache/spark/pull/27928#discussion_r419455403
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File path: dev/README.md
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@@ -1,5 +1,20 @@
# Spark Developer Scripts
+
This directory contains scripts useful to developers when packaging,
testing, or committing to Spark.
Many of these scripts require Apache credentials to work correctly.
+
+## Managing Python-based Development Requirements
+
+* For local development, use `requirements.txt`.
+* For continuous integration and release engineering, use
`requirements-pinned.txt`.
+* `requirements-pinned.txt` is generated automatically from
`requirements.txt`, so don't update it by hand.
+
+ To update `requirements-pinned.txt`, use pip-tools:
+
+ ```sh
+ pip install pip-tools
+ cd dev/
+ pip-compile requirements.txt --output-file requirements-pinned.txt
Review comment:
I just removed it because I thought this is too much my preference :). I
dont mind.
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