Got ModuleNotFoundError on execute airflow initdb command

[rafaelreuber]

I just tried to follow quick start and I got the following error on execute the command airflow initdb

[reuber@stormy teste]$ airflow initdb
Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 26, in <module>
    from airflow.bin.cli import CLIFactory
  File "/usr/local/lib/python3.8/site-packages/airflow/bin/cli.py", line 79, in <module>
    api_module = import_module(conf.get('cli', 'api_client'))  # type: Any
  File "/usr/lib64/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/usr/local/lib/python3.8/site-packages/airflow/api/client/local_client.py", line 24, in <module>
    from airflow.api.common.experimental import delete_dag
  File "/usr/local/lib/python3.8/site-packages/airflow/api/common/experimental/delete_dag.py", line 25, in <module>
    from airflow.models.serialized_dag import SerializedDagModel
  File "/usr/local/lib/python3.8/site-packages/airflow/models/serialized_dag.py", line 32, in <module>
    from airflow.serialization.serialized_objects import SerializedDAG
  File "/usr/local/lib/python3.8/site-packages/airflow/serialization/serialized_objects.py", line 37, in <module>
    from airflow.serialization.json_schema import Validator, load_dag_schema
  File "/usr/local/lib/python3.8/site-packages/airflow/serialization/json_schema.py", line 26, in <module>
    from typing_extensions import Protocol
ModuleNotFoundError: No module named 'typing_extensions'

I'm using the Fedora 32 (linux) 64 Bits and Python 3.8.2

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[potiuk]

Python 3.8 is not yet officially supported. There is a PR in progress #8674