argparse `MetavarTypeHelpFormatter` not available in ConfigArgParse

[Cruisen]

Missing Formater

MetavarTypeHelpFormatter is part of argparse

• see: https://docs.python.org/3/library/argparse.html#formatter-class

Error

• However MetavarTypeHelpFormatter is not available in ConfigArgParse

• It actually fails on import:
  ImportError: cannot import name 'MetavarTypeHelpFormatter' from 'configargparse'

PR wanted?

• I was able to patch https://github.com/bw2/ConfigArgParse/blob/master/configargparse.py

Note

• As a side effect I found a bug on argparse itself. It fails if MetavarTypeHelpFormatter is used and an argument does not have an type argument:
  AttributeError: 'NoneType' object has no attribute '__name__'
• I will raise an Issue, maybe a PR there as well.

[Cruisen]

This was an issue on my misunderstanding. Hence a user error.

Fix is:

from argparse import MetavarTypeHelpFormatter

-> Closing the issue.