Stefaan Lippens created SPARK-26831:
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Summary: bin/pyspark: avoid hardcoded `python` command and improve
version checks
Key: SPARK-26831
URL: https://issues.apache.org/jira/browse/SPARK-26831
Project: Spark
Issue Type: Improvement
Components: PySpark
Affects Versions: 2.4.0
Reporter: Stefaan Lippens
(this originally started at https://github.com/apache/spark/pull/23736)
I was trying out pyspark on a system with only a {{python3}} command but no
{{python}} command and got this error:
{code}
/opt/spark/bin/pyspark: line 45: python: command not found
{code}
While the pyspark script is full of variables to refer to a python interpreter
there is still a hardcoded {{python}} used for
{code}
WORKS_WITH_IPYTHON=$(python -c 'import sys; print(sys.version_info >= (2, 7,
0))')
{code}
While looking into this, I also noticed the bash syntax for the IPython version
check is wrong:
{code}
if [[ ! $WORKS_WITH_IPYTHON ]]
{code}
always evaluates to false when {{$WORKS_WITH_IPYTHON}} is non-empty (so in both
cases "True" and "False")
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