run capital-gains command and get erro: AttributeError: module 'argparse' has no attribute 'BooleanOptionalAction'

Question

I'm trying to use python library capital-gains I refer https://pypi.org/project/capital-gains/ this python docs. when I run capital-gains command it throws an error:

AttributeError: module 'argparse' has no attribute 'BooleanOptionalAction'

Traceback (most recent call last): File "/home/archana/mantralabs/backend/env/bin/capital-gains", line 8, in sys.exit(main()) File "/home/archana/mantralabs/backend/env/lib/python3.6/site-packages/capital_gains/capital_gains.py", line 11, in main parser = argument_parser.get_parser() File "/home/archana/mantralabs/backend/env/lib/python3.6/site-packages/capital_gains/argument_parser.py", line 52, in get_parser action=argparse.BooleanOptionalAction, AttributeError: module 'argparse' has no attribute 'BooleanOptionalAction'

Python version - 3.8

Can anyone help me? i'm not able to find out solution on google

Answer 1

Actually The argparse.BooleanOptionalAction feature is only available in Python 3.9 and above. you can try with python 3.9 or above version's