Could not build genfire Cannot load backend 'Qt5Agg' which requires the 'qt5'

[kevinsmia1939]

Hello,

I could not build ncempy on openSUSE Tumbleweed.
I am trying to submit genfire to openSUSE repository at the moment.
I tried installing python3-qt5 and python3-matplotlib-qt5 but the error still occur.

The dependency I install are:

Requires:       python3-Pillow 
Requires:       python3-PyQt5 
Requires:       python3-matplotlib 
Requires:       python3-numpy 
Requires:       python3-pyparsing 
Requires:       python3-scipy 
Requires:       python3-setuptools
Requires:       python3-pyFFTW
Requires:       python3-matplotlib-qt5
Requires:       python3-qt5

The error are shown below.
Thanks.

[    7s] running test
[    7s] WARNING: Testing via this command is deprecated and will be removed in a future version. Users looking for a generic test entry point independent of test runner are encouraged to use tox.
[    8s] running egg_info
[    8s] writing genfire.egg-info/PKG-INFO
[    8s] writing dependency_links to genfire.egg-info/dependency_links.txt
[    8s] writing requirements to genfire.egg-info/requires.txt
[    8s] writing top-level names to genfire.egg-info/top_level.txt
[    8s] reading manifest file 'genfire.egg-info/SOURCES.txt'
[    8s] writing manifest file 'genfire.egg-info/SOURCES.txt'
[    8s] running build_ext
[    8s] genfire (unittest.loader._FailedTest) ... ERROR
[    8s] 
[    8s] ======================================================================
[    8s] ERROR: genfire (unittest.loader._FailedTest)
[    8s] ----------------------------------------------------------------------
[    8s] ImportError: Failed to import test module: genfire
[    8s] Traceback (most recent call last):
[    8s]   File "/usr/lib64/python3.8/unittest/loader.py", line 470, in _find_test_path
[    8s]     package = self._get_module_from_name(name)
[    8s]   File "/usr/lib64/python3.8/unittest/loader.py", line 377, in _get_module_from_name
[    8s]     __import__(name)
[    8s]   File "/home/abuild/rpmbuild/BUILD/GENFIRE-Python-1.1.11+git.1512394233.b7b46da/genfire/__init__.py", line 4, in <module>
[    8s]     from . import gui
[    8s]   File "/home/abuild/rpmbuild/BUILD/GENFIRE-Python-1.1.11+git.1512394233.b7b46da/genfire/gui/__init__.py", line 2, in <module>
[    8s]     from . import VolumeSlicer
[    8s]   File "/home/abuild/rpmbuild/BUILD/GENFIRE-Python-1.1.11+git.1512394233.b7b46da/genfire/gui/VolumeSlicer.py", line 16, in <module>
[    8s]     matplotlib.use("Qt5Agg")
[    8s]   File "/usr/lib64/python3.8/site-packages/matplotlib/cbook/deprecation.py", line 307, in wrapper
[    8s]     return func(*args, **kwargs)
[    8s]   File "/usr/lib64/python3.8/site-packages/matplotlib/__init__.py", line 1307, in use
[    8s]     switch_backend(name)
[    8s]   File "/usr/lib64/python3.8/site-packages/matplotlib/pyplot.py", line 233, in switch_backend
[    8s]     raise ImportError(
[    8s] ImportError: Cannot load backend 'Qt5Agg' which requires the 'qt5' interactive framework, as 'headless' is currently running
[    8s] 
[    8s] 
[    8s] ----------------------------------------------------------------------
[    8s] Ran 1 test in 0.000s
[    8s] 
[    8s] FAILED (errors=1)
[    8s] Test failed: <unittest.runner.TextTestResult run=1 errors=1 failures=0>
[    8s] error: Test failed: <unittest.runner.TextTestResult run=1 errors=1 failures=0>

Full error log here: https://build.opensuse.org/package/live_build_log/home:andythe_great/python3-genfire/openSUSE_Tumbleweed/x86_64

[apryor6]

Sorry you are having this problem. I’m unfortunately unable to maintain this project due to time constraints. I will say that Qt can be pretty fickle, especially with Python. It’s likely that in the time since this was last updated there has been a breaking change in one of the dependencies. You might find running pip install -U for some of the requirements of this project resolves the issue.
If you are able to resolve, I’ll happily review and accept a PR.

[kevinsmia1939]

Sorry you are having this problem. I’m unfortunately unable to maintain this project due to time constraints. I will say that Qt can be pretty fickle, especially with Python. It’s likely that in the time since this was last updated there has been a breaking change in one of the dependencies. You might find running pip install -U for some of the requirements of this project resolves the issue.
If you are able to resolve, I’ll happily review and accept a PR.

Thanks for the reply.
I check all the required dependency, it seems to be satisfied, but still same error.
I need this package for openNCEM.

Could this error due to matplot? Anyway, I will try to figure it out.

[kevinsmia1939]

Some searching on the error, I found some other python with the same issue.

ludwig-ai/ludwig#46
ludwig-ai/ludwig@2d84dbd

[ercius]

@kevinsmia1939 We could use a little more information regarding your setup. If you are using a 'headless' machines (i.e. no graphical user interface) then the GUI will stop this from working.

[thomasaarholt]

I was running genfire in jupyter notebook over an ssh tunnel, an experienced the same problem. Since I don't need the GUI, qt5 isn't necessary.

I commented out all uses of matplotlib.use("Qt5Agg"), and it imports fine.

[kevinsmia1939]

I was running genfire in jupyter notebook over an ssh tunnel, an experienced the same problem. Since I don't need the GUI, qt5 isn't necessary.

I commented out all uses of matplotlib.use("Qt5Agg"), and it imports fine.

I add Xvfb deoendency to the package, the test works now.