SyntaxError when running server

[Koshmaar]

Did like described in readme, applied migrations, but app doesn't work:

Request Method: | GET
-- | --
http://127.0.0.1:8000/
1.8
SyntaxError
invalid syntax (resource.py, line 45)
/home/hubert/code/prototypes/jsgrid-django/venv/lib/python3.8/site-packages/simple_rest/__init__.py in <module>, line 4
/home/hubert/code/prototypes/jsgrid-django/venv/bin/python
3.8.5
['/home/hubert/code/prototypes/jsgrid-django',  '/home/hubert/.pyenv/versions/3.8.5/lib/python38.zip',  '/home/hubert/.pyenv/versions/3.8.5/lib/python3.8',  '/home/hubert/.pyenv/versions/3.8.5/lib/python3.8/lib-dynload',  '/home/hubert/code/prototypes/jsgrid-django/venv/lib/python3.8/site-packages']