Yet another "Unable to install matplotlib"

[矢作英幸]

I cannot install matplotlib for python3.
I tried pip3 with git and pypi but neither worked.

• pip3 for git → install_git.txt

pip3 install git+https://github.com/matplotlib/matplotlib.git

• pip3 for pypi → install_pypi.org.txt

pip3 install https://files.pythonhosted.org/packages/4a/30/eb8e7dd8e3609f05c6920fa82f189302c832e5a0f6667aa96f952056bc0c/matplotlib-3.2.1.tar.gz

Any help would be greatly appreciated.

uzaemon@Japan

[Kevin Adler]

You are missing the PASE header files on that system. You will need to install 5770-SS1 option 13 “System Openness Includes”

[矢作英幸]

Thank you for your reply.

“5770-SS1 option 13” is installed.

$ system dspsfwrsc
(SNIP)
  5770SS1     13         5050       *CODE      QSYSINC        V7R4M0         システム・オープンの組み込み
(SNIP)
  5770SS1     33         5111       *CODE      QPASE          V7R4M0         PORTABLE APP SOLUTIONS ENVIRONMENT
  5770SS1     33         2962       *LNG       QPASE          V7R4M0         PORTABLE APP SOLUTIONS ENVIRONMENT
(SNIP)
  5733SC1     1          5050       *CODE      QUTL           V7R2M0         OPENSSH, OPENSSL, ZLIB
(SNIP)  
  5770WDS     56         5101       *CODE      QDEVTOOLS      V7R4M0         IXLC FOR C/C++

I don’t know but it looks like the errors are related to freetype in logs.
Please let me know if you have any ideas.

[Kevin Adler]

Looks like the error is from

    /QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix g++ -pthread -pthread -bI:/QOpenSys/pkgs/lib/python3.6/config-3.6m/python.exp -Wl,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib build/temp.os400-powerpc64-3.6/src/checkdep_freetype2.o build/temp.os400-powerpc64-3.6/src/ft2font.o build/temp.os400-powerpc64-3.6/src/ft2font_wrapper.o build/temp.os400-powerpc64-3.6/src/mplutils.o build/temp.os400-powerpc64-3.6/src/py_converters.o -L/QOpenSys/pkgs/lib -o build/lib.os400-powerpc64-3.6/matplotlib/ft2font.so -L/QOpenSys/pkgs/lib -lfreetype
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 66:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 67:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 68:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 69:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 70:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 71:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    collect2: error: ld returned 8 exit status
    error: command '/QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix' failed with exit status 1

‌

For some reason ft2font.exp is being generated with invalid attributes by ld_so_aix. I’ll take a look.

[矢作英幸]

I’ll take a look.

Thank you for your support.

Matplotlib is very popular visualization library for python and most python environments support it.
It will be a great complement to the character-based 5250 applications.

[Kevin Adler]

Installing freetype-devel and pkg-config with yum should fix this problem.

[Gavin Gan Zhang]

https://www.ibmsystemsmag.com/IT-Strategy/11/2019/How-to-Start-ml-on-IBM-i?utm_content=105130364&utm_medium=social&utm_source=twitter&hss_channel=tw-488711278

Here’s a details instructions on how to setup the ML env on your system, including the matplotlib and jupyter notebook. I would think all the necessary packages required by ML are there. thx.

[Gavin Gan Zhang]

hmmm. A pity , seems I missed one package on that publish, please “yum install zlib-devel” as well before you try matplotlib. thx.

[矢作英幸]

Zhang-san,

Thank you for your suggestion.
All libraries mentioned at “Set Up the Matplotlib Environment“ have been installed and current as shown in attachment “yum_list.txt”.

Adler-san,

I checked library updates by ACS OSPM and there are no update to libraries you pointed.
To make sure, I ran yum again.
* Run “export OBJECT_MODE=64“ did not affect to the error status.

bash-4.4$ yum install freetype-devel pkg-config zlib-devel
Setting up Install Process
Package freetype-devel-2.10.1-1.ppc64 already installed and latest version
Package pkg-config-0.29.2-1.ppc64 already installed and latest version
Package zlib-devel-1.2.11-3.ppc64 already installed and latest version
Nothing to do

Then I tried to install matplotlib but seems like it reports the same error.

bash-4.4$ pip3 install matplotlib
Collecting matplotlib
  Using cached https://files.pythonhosted.org/packages/4a/30/eb8e7dd8e3609f05c6920fa82f189302c832e5a0f6667aa96f952056bc0c/matplotlib-3.2.1.tar.gz
Requirement already satisfied: cycler>=0.10 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: kiwisolver>=1.0.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: numpy>=1.11 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: python-dateutil>=2.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: six in /QOpenSys/pkgs/lib/python3.6/site-packages (from cycler>=0.10->matplotlib)
Building wheels for collected packages: matplotlib
  Running setup.py bdist_wheel for matplotlib ... error
  Complete output from command /QOpenSys/pkgs/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-l9lbd5fy/matplotlib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmp0foyu647pip-wheel- --python-tag cp36:

  Edit setup.cfg to change the build options; suppress output with --quiet.
  (SNIP)
      gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -O2 -g -maix64 -O2 -g -maix64 -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/QOpenSys/pkgs/lib/python3.6/site-packages/numpy/core/include -I/QOpenSys/pkgs/include/python3.6m -c src/py_converters.cpp -o build/temp.os400-powerpc64-3.6/src/py_converters.o -I/QOpenSys/pkgs/include/freetype2
    /QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix g++ -pthread -pthread -bI:/QOpenSys/pkgs/lib/python3.6/config-3.6m/python.exp -Wl,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib build/temp.os400-powerpc64-3.6/src/checkdep_freetype2.o build/temp.os400-powerpc64-3.6/src/ft2font.o build/temp.os400-powerpc64-3.6/src/ft2font_wrapper.o build/temp.os400-powerpc64-3.6/src/mplutils.o build/temp.os400-powerpc64-3.6/src/py_converters.o -L/QOpenSys/pkgs/lib -o build/lib.os400-powerpc64-3.6/matplotlib/ft2font.so -L/QOpenSys/pkgs/lib -lfreetype
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 66:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 67:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 68:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 69:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 70:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file ft2font.exp at line 71:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    collect2: error: ld returned 8 exit status
    error: command '/QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix' failed with exit status 1

    ----------------------------------------
Command "/QOpenSys/pkgs/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-l9lbd5fy/matplotlib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-v5bkczt1-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-l9lbd5fy/matplotlib/
bash-4.4$

I appreciate your help and looking forward to hearing another solution.

[Gavin Gan Zhang]

I noticed that you are on i 7.4. I tried a recreate from a clean system. I can also hit this error on my 7.4 system now. I would take a look.

In case , you have any 7.2 system, you can make a try there to avoid waiting on me. I did a v7r2 verification early of this week, which worked very well.

[矢作英幸]

Zhang-san,

Thank you very much for your update.
Unfortunately, I don’t have 7.2 system so waiting for your suggestion.

Your support is much appreciated.

‌

[Former user]

I updated Python today and got different error during installation of matplotlib.
Any idea?

In the meantime, we can use Altair and folium sucsessfully.
See https://youtu.be/vl2u_TjttFg?t=802 if you are interested.
Remember to show caption and set YouTube setting to translate to your language.

uzaemon@Japan

‌

[Former user]

‌

bash-4.4$ pip3 install matplotlib
Collecting matplotlib
  Downloading https://files.pythonhosted.org/packages/7d/d4/e4c40c62cd8608ca09f0684e64139c56512e195f2351ac41a472d4dc8b38/matplotlib-3.3.0.tar.gz (38.8MB)
    100% |################################| 38.8MB 22kB/s
Requirement already satisfied: cycler>=0.10 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: kiwisolver>=1.0.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: numpy>=1.15 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: pillow>=6.2.0 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: python-dateutil>=2.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: six in /QOpenSys/pkgs/lib/python3.6/site-packages (from cycler>=0.10->matplotlib)
Building wheels for collected packages: matplotlib
  Running setup.py bdist_wheel for matplotlib ... error
  Complete output from command /QOpenSys/pkgs/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rx_mbyrt/matplotlib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmpv3r9lkdupip-wheel- --python-tag cp36:

  Edit setup.cfg to change the build options; suppress output with --quiet.

  BUILDING MATPLOTLIB
    matplotlib: yes [3.3.0]
        python: yes [3.6.10 (default, Jul 20 2020, 09:04:05)  [GCC 6.3.0]]
      platform: yes [aix7]
   sample_data: yes [installing]
         tests: no  [skipping due to configuration]
        macosx: no  [Mac OS-X only]

(SNIP)

    gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -O2 -g -maix64 -O2 -g -maix64 -fPIC -DPY_ARRAY_UNIQUE_SYMBOL=MPL_matplotlib_backends__backend_agg_ARRAY_API -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -D__STDC_FORMAT_MACROS=1 -DFREETYPE_BUILD_TYPE=system -Iextern/agg24-svn/include -I/QOpenSys/pkgs/lib/python3.6/site-packages/numpy/core/include -I/QOpenSys/pkgs/include/python3.6m -c extern/agg24-svn/src/agg_vpgen_segmentator.cpp -o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_vpgen_segmentator.o -I/QOpenSys/pkgs/include/freetype2 -fvisibility=hidden
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp: In member function 'void agg::vpgen_segmentator::move_to(double, double)':
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp:31:5: warning: visibility attribute not supported in this configuration; ignored [-Wattributes]
         }
         ^
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp: In member function 'void agg::vpgen_segmentator::line_to(double, double)':
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp:44:5: warning: visibility attribute not supported in this configuration; ignored [-Wattributes]
         }
         ^
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp: In member function 'unsigned int agg::vpgen_segmentator::vertex(double*, double*)':
    extern/agg24-svn/src/agg_vpgen_segmentator.cpp:64:5: warning: visibility attribute not supported in this configuration; ignored [-Wattributes]
         }
         ^
    /QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix g++ -pthread -pthread -bI:/QOpenSys/pkgs/lib/python3.6/config-3.6m/python.exp -Wl,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib build/temp.os400-powerpc64-3.6/src/checkdep_freetype2.o build/temp.os400-powerpc64-3.6/src/mplutils.o build/temp.os400-powerpc64-3.6/src/py_converters.o build/temp.os400-powerpc64-3.6/src/_backend_agg.o build/temp.os400-powerpc64-3.6/src/_backend_agg_wrapper.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_bezier_arc.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_curves.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_image_filters.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_trans_affine.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_vcgen_contour.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_vcgen_dash.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_vcgen_stroke.o build/temp.os400-powerpc64-3.6/extern/agg24-svn/src/agg_vpgen_segmentator.o -L/QOpenSys/pkgs/lib -o build/lib.os400-powerpc64-3.6/matplotlib/backends/_backend_agg.so -L/QOpenSys/pkgs/lib -lfreetype
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 39:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 40:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 41:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 42:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 43:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    ld: 0711-418 ERROR: Import or export file _backend_agg.exp at line 44:
        A symbol name may only be followed by an export attribute
        or an address. The line is being ignored.
    collect2: error: ld returned 8 exit status
    error: command '/QOpenSys/pkgs/lib/python3.6/config-3.6m/ld_so_aix' failed with exit status 1

    ----------------------------------------
Command "/QOpenSys/pkgs/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rx_mbyrt/matplotlib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-7e7o79jv-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-rx_mbyrt/matplotlib/
bash-4.4$

‌

[Gavin Gan Zhang]

How did you know a new python3 is available? I really opened an internal defect for python3, which would fix one issue in makexp_aix tools in python3. But that defect has not been fixed yet. It’s really related to the .exp files generated by that tool, which is similar as what you found . So, let’s wait for the fix and see whether it would also fix this issue in _backend_agg.exp.

[矢作英幸]

Hello,

How did you know a new python3 is available?

I just ran opensource package management of ACS and found that updates for Python3 are available.
So I updated Python3 (and other OSSs) as a trial.

So, let’s wait for the fix and see whether it would also fix this issue in _backend_agg.exp.

I see.
I’ll be watching fix for the problem.

uzaemon@Japan

[Gavin Gan Zhang]

Today, I got an internal report with same error as yours on _backend_agg.exp file. I can confirm that this is the exact same issue as what I have found. So, the fix could also fix this issue as well.

As I can not see the target date of the fix , I would think you can try a local change if you like.

The bug is from this file: /QOpenSys/pkgs/lib/python3.6/config-3.6m/makexp_aix, which is a script .

You can just add a “-C” option in this script for the nm line.

From:

/QOpenSys/usr/bin/nm -Bex -X32_64 $* \
| sed -e '/ [^BDT] /d' -e '/\./d' -e 's/.* [BDT] //' -e '/::/d' \
| sort | uniq
) > $expFileName

to:

/QOpenSys/usr/bin/nm -C -Bex -X32_64 $* \
| sed -e '/ [^BDT] /d' -e '/\./d' -e 's/.* [BDT] //' -e '/::/d' \
| sort | uniq
) > $expFileName

‌

[Kevin Adler]

The latest Python build has the fix that @{5cf87ae423e75a0e7d27e364} posted previously.

[矢作英幸]

I installed python3 3.6.10-6 and matplotlib works now!
Thank you for all your assistance.

$ PATH=/QOpenSys/pkgs/bin:$PATH
$ export PATH
$ bash
bash-4.4$ pip3 install matplotlib
Collecting matplotlib
  Downloading https://files.pythonhosted.org/packages/58/bd/d3b13e93c01226901ceb50a14c110b5722f446e456f7f4fd7fd231b33742/matplotlib-3.3.1.tar.gz (38.8MB)
    100% |################################| 38.8MB 22kB/s
Collecting certifi>=2020.06.20 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/5e/c4/6c4fe722df5343c33226f0b4e0bb042e4dc13483228b4718baf286f86d87/certifi-2020.6.20-py2.py3-none-any.whl (156kB)
    100% |################################| 163kB 1.0MB/s
Requirement already satisfied: cycler>=0.10 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: kiwisolver>=1.0.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: numpy>=1.15 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: pillow>=6.2.0 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: python-dateutil>=2.1 in /QOpenSys/pkgs/lib/python3.6/site-packages (from matplotlib)
Requirement already satisfied: six in /QOpenSys/pkgs/lib/python3.6/site-packages (from cycler>=0.10->matplotlib)
Building wheels for collected packages: matplotlib
  Running setup.py bdist_wheel for matplotlib ... done
  Stored in directory: /home/YAHAGI/.cache/pip/wheels/34/c6/b9/f53ef71855a49ada4740787cbf92943d580ea43e32ff228ba3
Successfully built matplotlib
Installing collected packages: certifi, matplotlib
  Found existing installation: certifi 2020.4.5.2
    Uninstalling certifi-2020.4.5.2:
      Successfully uninstalled certifi-2020.4.5.2
Successfully installed certifi-2020.6.20 matplotlib-3.3.1


bash-4.4$ cat matplotlib_test.py
import numpy as np
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt

x = np.linspace(-np.pi, np.pi)
y1 = np.sin(x)
y2 = np.cos(x)

fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)

# plot
ax.plot(x, y1, linestyle='--', color='b', label='y = sin(x)')
ax.plot(x, y2, linestyle='-', color='#e46409', label='y = cos(x)')

# x axis
plt.xlim([-np.pi, np.pi])
ax.set_xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi])
ax.set_xticklabels(['-pi', '-pi/2', '0', 'pi/2', 'pi'])
ax.set_xlabel('x')

# y axis
plt.ylim([-1.2, 1.2])
ax.set_yticks([-1, -0.5, 0, 0.5, 1])
ax.set_ylabel('y')

# legend and title
ax.legend(loc='best')
ax.set_title('Plot of sine and cosine')

# save as png
plt.savefig('test.png')


bash-4.4$ python3 matplotlib_test.py

‌