Python Error - TypeError: item 1 in _argtypes_ passes a union by value, which is unsupported

python tkinter anaconda typeerror pyglet
Dubbox picture Dubbox · Jan 24, 2020 · Viewed 8.7k times · Source

I think this is a not a programming specific bug, but is caused by some libraries.

I am transferring my project to a new PC, which I have freshly setup with anaconda etc. using python 3.7.6. Executing the task on the old machine works fine, here I have also used anaconda with python 3.7 (not sure if it was 3.7.6 but I could check this, i just used while creating the environment python=3.7).

When I now try to run my program, I receive:

Exception in Tkinter callback
Traceback (most recent call last):
...    
TypeError: item 1 in _argtypes_ passes a union by value, which is unsupported.

The error is quite long, but it is caused by the following libraries: calling gym.envs which then calls some pyglet.libs

The last line in the error is

...from pyglet.libs.x11 import xlib
  File "...7/lib/python3.7/site-packages/pyglet/libs/x11/xlib.py", line 2928, in <module>
    XEHeadOfExtensionList.argtypes = [XEDataObject]

Thank you for your help! I do not know how to solve this or even start solving it.

Answer

Dubbox picture Dubbox · Jan 25, 2020

It seems like there is simply no support currently for using gym+pyglet in python version 3.7.6+.

The pyglet error is fixed in 1.4.9+ but gym is currently not compatible with those versions.

Still it is possible to simply downgrade python to 3.7.4 and everything works fine as it is supposed to do.

Related questions

Install tkinter for Python

I am trying to import Tkinter. However, I get an error stating that Tkinter has not been installed: ImportError: No module named _tkinter, please install the python-tk package I could probably install it using synaptic manager (can I?), however, I …

Read More
How to pip or easy_install tkinter on Windows

My Idle is throwing errors that and says tkinter can't be imported. Is there a simple way to install tkinter via pip or easy_install? There seem to be a lot of package names flying around for this... This and …

Read More
ImportError: No module named 'Tkinter'

For some reason, I can't use the Tkinter or tkinter module. After running the following command in the python shell import Tkinter or import tkinter I got this error ModuleNotFoundError: No module named 'Tkinter' or ModuleNotFoundError: No module named 'tkinter' …

Read More