Why the walrus_operator ':=' cannot be used in 🐍 CCC, even though it works in 🐍 Playground⁉️🤔

Question

Code Coach Challenge & Playground use the same version of 🐍:
sys.version:
3.8.4 (default, Jul 14 2020, 03:07:46)
[GCC 8.3.0]

However, an attempt to use in the code a walrus_operator ':=' in 🐍 CCC generates an error & the message:

The code: print('True' if (w := 'PALINDROME') == w[::-1] else 'False')
The message: Using variable'walrus' before assignment

Everything works fine in 🐍 Playground‼️😃👍

Answer 1

Thats strange and interesting...
I wonder if the CCC uses Pylint, theres a similar issue in Github. Nothings wrong with it but Pylint argues that it's wrong...

https://github.com/PyCQA/pylint/issues/3347