GUI not starting on windows

[Chilipp]

Code Sample, a copy-pastable example if possible

install psyplot via

conda create -n test -c psyplot/label/master -c conda-forge psyplot-gui
conda activate test
psyplot

Problem description

the GUI is not starting (see also Chilipp/straditize#19)

traceback

psyplot
Attribute Qt::AA_UseSoftwareOpenGL must be set before QCoreApplication is created.
Traceback (most recent call last):
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 535, in get
    value = obj._trait_values[self.name]
KeyError: 'iopub_socket'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 535, in get
    value = obj._trait_values[self.name]
KeyError: 'iopub_thread'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\SommerP\Miniconda3\envs\test\Scripts\psyplot-script.py", line 10, in <module>
    sys.exit(main())
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\psyplot\__main__.py", line 48, in main
    parser.parse_known2func(args)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\funcargparse\__init__.py", line 930, in parse_known2func
    return func(**kws), remainder
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\psyplot_gui\__init__.py", line 256, in start_app
    mainwindow = MainWindow.run(fnames, project, engine, plot_method, name,
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\psyplot_gui\main.py", line 1039, in run
    mainwindow = cls(show=show)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\psyplot_gui\main.py", line 145, in __init__
    self.console = ConsoleWidget(self)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\psyplot_gui\console.py", line 105, in __init__
    kernel_manager.start_kernel(show_banner=False)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\inprocess\manager.py", line 46, in start_kernel
    self.kernel = InProcessKernel(parent=self, session=self.session)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 72, in __init__
    super(InProcessKernel, self).__init__(**traits)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\ipkernel.py", line 71, in __init__
    self.shell.displayhook.pub_socket = self.iopub_socket
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 1577, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 67, in _default_iopub_socket
    return self.iopub_thread.background_socket
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 575, in __get__
    return self.get(obj, cls)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 538, in get
    default = obj.trait_defaults(self.name)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 1577, in trait_defaults
    return self._get_trait_default_generator(names[0])(self)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\traitlets\traitlets.py", line 975, in __call__
    return self.func(*args, **kwargs)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\inprocess\ipkernel.py", line 59, in _default_iopub_thread
    thread = IOPubThread(self._underlying_iopub_socket)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\iostream.py", line 71, in __init__
    self._setup_event_pipe()
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\ipykernel\iostream.py", line 90, in _setup_event_pipe
    self._event_puller = ZMQStream(pipe_in, self.io_loop)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\zmq\eventloop\zmqstream.py", line 127, in __init__
    self._init_io_state()
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\zmq\eventloop\zmqstream.py", line 552, in _init_io_state
    self.io_loop.add_handler(self.socket, self._handle_events, self.io_loop.READ)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\site-packages\tornado\platform\asyncio.py", line 100, in add_handler
    self.asyncio_loop.add_reader(fd, self._handle_events, fd, IOLoop.READ)
  File "C:\Users\SommerP\Miniconda3\envs\test\lib\asyncio\events.py", line 501, in add_reader
    raise NotImplementedError
NotImplementedError

Output of psyplot -aV

psyplot -aV

psyplot:
  requirements:
    matplotlib: 3.3.1
    numpy: 1.19.1
    pandas: 1.1.2
    python: 3.8.5 | packaged by conda-forge | (default, Aug 29 2020, 00:43:28) [MSC
      v.1916 64 bit (AMD64)]
    xarray: 0.16.0
  version: 1.3.0
psyplot_gui:
  requirements:
    pyqt: 5.12.3
    qt: 5.12.5
    qtconsole: 4.7.7
  version: 1.3.0

conda list

# Name                    Version                   Build  Channel
alabaster                 0.7.12                     py_0    conda-forge
babel                     2.8.0                      py_0    conda-forge
backcall                  0.2.0              pyh9f0ad1d_0    conda-forge
backports                 1.0                        py_2    conda-forge
backports.functools_lru_cache 1.6.1                      py_0    conda-forge
brotlipy                  0.7.0           py38h1e8a9f7_1000    conda-forge
ca-certificates           2020.6.20            hecda079_0    conda-forge
certifi                   2020.6.20        py38h32f6830_0    conda-forge
cffi                      1.14.1           py38hba49e27_0    conda-forge
chardet                   3.0.4           py38h32f6830_1006    conda-forge
colorama                  0.4.3                      py_0    conda-forge
cryptography              3.1              py38hba49e27_0    conda-forge
cycler                    0.10.0                     py_2    conda-forge
decorator                 4.4.2                      py_0    conda-forge
docrep                    0.3.1              pyh9f0ad1d_0    conda-forge
docutils                  0.16             py38h32f6830_1    conda-forge
entrypoints               0.3             py38h32f6830_1001    conda-forge
fasteners                 0.14.1                     py_3    conda-forge
freetype                  2.10.2               hd328e21_0    conda-forge
funcargparse              0.2.2                      py_0    conda-forge
icu                       67.1                 h33f27b4_0    conda-forge
idna                      2.10               pyh9f0ad1d_0    conda-forge
imagesize                 1.2.0                      py_0    conda-forge
intel-openmp              2020.1                      216
ipykernel                 5.3.4            py38h5ca1d4c_0    conda-forge
ipython                   7.18.1           py38h1cdfbd6_0    conda-forge
ipython_genutils          0.2.0                      py_1    conda-forge
jedi                      0.15.2                   py38_0    conda-forge
jinja2                    2.11.2             pyh9f0ad1d_0    conda-forge
jpeg                      9d                   he774522_0    conda-forge
jupyter_client            5.3.4                    py38_1    conda-forge
jupyter_core              4.6.3            py38h32f6830_1    conda-forge
kiwisolver                1.2.0            py38heaebd3c_0    conda-forge
libblas                   3.8.0                    16_mkl    conda-forge
libcblas                  3.8.0                    16_mkl    conda-forge
libclang                  10.0.1          default_hf44288c_1    conda-forge
liblapack                 3.8.0                    16_mkl    conda-forge
libpng                    1.6.37               ha81a0f5_2    conda-forge
libsodium                 1.0.17               h2fa13f4_0    conda-forge
libtiff                   4.1.0                h885aae3_6    conda-forge
lz4-c                     1.9.2                h62dcd97_2    conda-forge
markupsafe                1.1.1            py38h9de7a3e_1    conda-forge
matplotlib                3.3.1                         1    conda-forge
matplotlib-base           3.3.1            py38hfb9ee82_1    conda-forge
mkl                       2020.1                      216
monotonic                 1.5                        py_0    conda-forge
numpy                     1.19.1           py38h72c728b_0    conda-forge
olefile                   0.46                       py_0    conda-forge
openssl                   1.1.1g               he774522_1    conda-forge
packaging                 20.4               pyh9f0ad1d_0    conda-forge
pandas                    1.1.2            py38h7ae7562_0    conda-forge
parso                     0.5.2                      py_0
pickleshare               0.7.5           py38h32f6830_1001    conda-forge
pillow                    7.2.0            py38h7011068_1    conda-forge
pip                       20.2.3                     py_0    conda-forge
prompt-toolkit            3.0.7                      py_0    conda-forge
psyplot                   1.3.0           py38_139_g152bf55_master_cf    psyplot/label/master
psyplot-gui               1.3.0           py38_63_gf59bc04_master_cf    psyplot/label/master
pycparser                 2.20               pyh9f0ad1d_2    conda-forge
pygments                  2.7.0                      py_0    conda-forge
pyopenssl                 19.1.0                     py_1    conda-forge
pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge
pyqt                      5.12.3           py38h6538335_1    conda-forge
pyqt5-sip                 4.19.18                  pypi_0    pypi
pyqtwebengine             5.12.1                   pypi_0    pypi
pysocks                   1.7.1            py38h32f6830_1    conda-forge
python                    3.8.5           h60c2a47_7_cpython    conda-forge
python-dateutil           2.8.1                      py_0    conda-forge
python_abi                3.8                      1_cp38    conda-forge
pytz                      2020.1             pyh9f0ad1d_0    conda-forge
pywin32                   227              py38hfa6e2cd_0    conda-forge
pyyaml                    5.3.1            py38h9de7a3e_0    conda-forge
pyzmq                     19.0.2           py38h77b9d75_0    conda-forge
qt                        5.12.6               hb2cf2c5_0    conda-forge
qtconsole                 4.7.7              pyh9f0ad1d_0    conda-forge
qtpy                      1.9.0                      py_0    conda-forge
requests                  2.24.0             pyh9f0ad1d_0    conda-forge
setuptools                49.6.0           py38h32f6830_0    conda-forge
six                       1.15.0             pyh9f0ad1d_0    conda-forge
snowballstemmer           2.0.0                      py_0    conda-forge
sphinx                    3.2.1                      py_0    conda-forge
sphinx_rtd_theme          0.5.0              pyh9f0ad1d_0    conda-forge
sphinxcontrib-applehelp   1.0.2                      py_0    conda-forge
sphinxcontrib-devhelp     1.0.2                      py_0    conda-forge
sphinxcontrib-htmlhelp    1.0.3                      py_0    conda-forge
sphinxcontrib-jsmath      1.0.1                      py_0    conda-forge
sphinxcontrib-qthelp      1.0.3                      py_0    conda-forge
sphinxcontrib-serializinghtml 1.1.4                      py_0    conda-forge
sqlite                    3.33.0               he774522_0    conda-forge
tk                        8.6.10               he774522_0    conda-forge
tornado                   6.0.4            py38hfa6e2cd_0    conda-forge
traitlets                 5.0.4                      py_0    conda-forge
urllib3                   1.25.10                    py_0    conda-forge
vc                        14.1                 h869be7e_1    conda-forge
vs2015_runtime            14.16.27012          h30e32a0_2    conda-forge
wcwidth                   0.2.5              pyh9f0ad1d_1    conda-forge
wheel                     0.35.1             pyh9f0ad1d_0    conda-forge
win_inet_pton             1.1.0                    py38_0    conda-forge
wincertstore              0.2                   py38_1003    conda-forge
xarray                    0.16.0                     py_0    conda-forge
xz                        5.2.5                h62dcd97_1    conda-forge
yaml                      0.2.5                he774522_0    conda-forge
zeromq                    4.3.2                ha925a31_3    conda-forge
zlib                      1.2.11            h62dcd97_1009    conda-forge
zstd                      1.4.5                h1f3a1b7_2    conda-forge

conda info

     active environment : test
    active env location : C:\Users\SommerP\Miniconda3\envs\test
            shell level : 2
       user config file : C:\Users\SommerP\.condarc
 populated config files : C:\Users\SommerP\.condarc
          conda version : 4.8.4
    conda-build version : 3.20.2
         python version : 3.8.3.final.0
       virtual packages :
       base environment : C:\Users\SommerP\Miniconda3  (writable)
           channel URLs : https://conda.anaconda.org/psyplot/label/master/win-64
                          https://conda.anaconda.org/psyplot/label/master/noarch
                          https://conda.anaconda.org/psyplot/win-64
                          https://conda.anaconda.org/psyplot/noarch
                          https://conda.anaconda.org/chilipp/win-64
                          https://conda.anaconda.org/chilipp/noarch
                          https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\Users\SommerP\Miniconda3\pkgs
                          C:\Users\SommerP\.conda\pkgs
                          C:\Users\SommerP\AppData\Local\conda\conda\pkgs
       envs directories : C:\Users\SommerP\Miniconda3\envs
                          C:\Users\SommerP\.conda\envs
                          C:\Users\SommerP\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.8.4 requests/2.23.0 CPython/3.8.3 Windows/10 Windows/10.0.18362
          administrator : False
             netrc file : None
           offline mode : False