[13] Odoo incompatible with Python 3.8

[grzekru]

Impacted versions:

Odoo 13
Python 3.8
Tested on Arch Linux and Debian, default python version on arch linux, and compiled from source on Debian

Steps to reproduce:

Run odoo using python 3.8

Current behavior:

Traceback (most recent call last):
  File "/home/gk/odoo/odoo/addons/base/models/qweb.py", line 314, in compile
    unsafe_eval(compile(astmod, '<template>', 'exec'), ns)
TypeError: required field "posonlyargs" missing from arguments

Error when compiling AST
TypeError: required field "posonlyargs" missing from arguments
Template: web.webclient_bootstrap
Path: /t/t/t[3]
Node: <t t-set="body_classname" t-value="'o_web_client'"/> - - -

Expected behavior:

Odoo works with newest stable python release

[pedrobaeza]

Duplicate of #40232

No P3.8 compatibility yet, so closing.

[tanvirahmedkhan74]

It took me sometimes but i was able to run it with python 3.8

I changed the requirment.txt file a bit, And watch my github link -

https://github.com/tanvirahmedkhan74/Installing-Odoo13-on-Ubuntu20.04-with-Python-3.8.git

Replace the requirments.txt file with the given one on the github