zhengruifeng opened a new pull request, #41248:
URL: https://github.com/apache/spark/pull/41248
### What changes were proposed in this pull request?
Remove the upper bound of `matplotlib` in requirements
### Why are the changes needed?
1, actually, `matplotlib` is not pinned in CI;
2, `matplotlib<3.3.0` fails `pip install -U -r dev/requirements.txt` in some
cases, e.g. in `ubuntu 20.04`
```
gcc -pthread -B /home/ruifeng.zheng/miniconda3/compiler_compat
-Wno-unused-result -Wsign-compare -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem
/home/ruifeng.zheng/miniconda3/include -fPIC -O2 -isystem
/home/ruifeng.zheng/miniconda3/include -fPIC -DFREETYPE_BUILD_TYPE=system
-DPY_ARRAY_UNIQUE_SYMBOL=MPL_matplotlib_ft2font_ARRAY_API
-DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -D__STDC_FORMAT_MACROS=1
-Iextern/agg24-svn/include
-I/home/ruifeng.zheng/miniconda3/lib/python3.10/site-packages/numpy/core/include
-I/home/ruifeng.zheng/miniconda3/include/python3.10 -c
src/checkdep_freetype2.c -o
build/temp.linux-x86_64-cpython-310/src/checkdep_freetype2.o
src/checkdep_freetype2.c:3:6: error: #error "FreeType version 2.3 or
higher is required. You may set the MPLLOCALFREETYPE environment variable to 1
to let Matplotlib download it."
#error "FreeType version 2.3 or higher is required. \
^~~~~
src/checkdep_freetype2.c:10:10: error: #include expects "FILENAME" or
<FILENAME>
#include FT_FREETYPE_H
^~~~~~~~~~~~~
src/checkdep_freetype2.c:15:9: note: #pragma message: Compiling with
FreeType version FREETYPE_MAJOR.FREETYPE_MINOR.FREETYPE_PATCH.
#pragma message("Compiling with FreeType version " \
^~~~~~~
src/checkdep_freetype2.c:18:4: error: #error "FreeType version 2.3 or
higher is required. You may set the MPLLOCALFREETYPE environment variable to 1
to let Matplotlib download it."
#error "FreeType version 2.3 or higher is required. \
^~~~~
error: command '/usr/bin/gcc' failed with exit code 1
[end of output]
note: This error originates from a subprocess, and is likely not a problem
with pip.
error: legacy-install-failure
× Encountered error while trying to install package.
╰─> matplotlib
```
### Does this PR introduce _any_ user-facing change?
no, dev-only
### How was this patch tested?
manually test
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