error occured when run orange-canvas

[wfg314]

when I run orange-canvas, error occured as below:

Traceback (most recent call last):
File "/root/DATA/orange_env/bin/orange-canvas", line 33, in
sys.exit(load_entry_point('Orange3', 'gui_scripts', 'orange-canvas')())
File "/root/DATA/orange_env/orange3/Orange/canvas/main.py", line 433, in main
return OMain().run(argv)
File "/root/DATA/orange_env/orange3/Orange/canvas/main.py", line 356, in run
super().run(argv)
File "/root/DATA/orange_env/lib/python3.7/site-packages/orangecanvas/main.py", line 198, in run
self.setup_application()
File "/root/DATA/orange_env/orange3/Orange/canvas/main.py", line 371, in setup_application
super().setup_application()
File "/root/DATA/orange_env/lib/python3.7/site-packages/orangecanvas/main.py", line 177, in setup_application
self.application = CanvasApplication(sys.argv[:1] + self.arguments)
File "/root/DATA/orange_env/lib/python3.7/site-packages/orangecanvas/application/application.py", line 116, in init
CanvasApplication._args, argv = self.parseArguments(argv)
File "/root/DATA/orange_env/lib/python3.7/site-packages/orangecanvas/application/application.py", line 197, in parseArguments
parser = CanvasApplication.argumentParser()
File "/root/DATA/orange_env/lib/python3.7/site-packages/orangecanvas/application/application.py", line 190, in argumentParser
default=default,
File "/usr/local/python3/lib/python3.7/argparse.py", line 1362, in add_argument
type_func = self._registry_get('type', action.type, action.type)
File "/usr/local/python3/lib/python3.7/argparse.py", line 1304, in _registry_get
return self._registries[registry_name].get(value, default)
TypeError: unhashable type: 'dict'

does anybody know the reason? Thanks.

[ajdapretnar]

You'll need to be more specific than that. How did you install Orange? Which OS you are running? Which installation instructions did you follow?

[wfg314]

os:Linux
installation steps:
1,create a virtual environment:
mkdir orange_env
cd orange_env/
python3.7 -m venv .
source bin/activate
2,clone the repo:
https://github.com/biolab/orange3.git
3,install orange:
pip3.7 install -e orange3

finally,run:
orange-canvas

[ales-erjavec]

Can you try downgrading orange-canvas-core

pip3.7 install orange-canvas-core==0.1.24

[wfg314]

Requirement already satisfied

[ales-erjavec]

This seems to be due to https://bugs.python.org/issue16516

Can you please try out biolab/orange-canvas-core#228
pip3.7 install git+https://github.com/ales-erjavec/orange-canvas-core.git@fixes/argparse-unhashable-type

[wfg314]

It's failed when installing:

ERROR: Command errored out with exit status 128: git clone -q https://github.com/ales-erjavec/orange-canvas-core.git

[markotoplak]

@ales-erjavec, I could replicate the original problem on a Mac, Python 3.7. With your fix everything seems to work properly.

[wfg314]

It's solved by installed again.