[Docutils-develop] [docutils:bugs] #441 Move from "optparse" to "argparse".

[Günter M. <mi...@us...>]

Intended steps:
* Fully backwards compatible change of "settings spec" processing. 
* Remove the DeprecationWarning filter in the test suite.
* Consider moving to a new settings-spec format based on ordered dicts.
    * Converter class for the current format.
    * Use the new format in Docutils component.
    * Deprecate the old format and related helpers/hacks in "utils".
Help welcome.


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** [bugs:#441] Move from "optparse" to "argparse".**

**Status:** open
**Created:** Thu Jan 06, 2022 03:02 PM UTC by Günter Milde
**Last Updated:** Thu Jan 06, 2022 03:02 PM UTC
**Owner:** Günter Milde


The optparse documentation says:
> Deprecated since version 3.2: The optparse module is deprecated and will not be developed further; development will continue with the argparse module.

We are currently suppressing related deprecation warnings in the test suite.
After raising the Python dependency to >=3.7, now may be the right time to make the move.


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