[SPARK-37756][PYTHON] Enable matplotlib test for pandas API on Spark #35036
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What changes were proposed in this pull request?
This PR proposes to install
matplotlib
for Python 3.9 in our base image, to enablematplotlib
test for pandas API on Spark.Before
After
Why are the changes needed?
Currently, some tests are skipped due to lack of
matplotlib
installed as below:So, we'd better to enable this to improve the test coverage.
Does this PR introduce any user-facing change?
No, it's test only.
How was this patch tested?
The existing tests are should be passed.