I am updating PEP 597 to include discussions in the thread. Before finishing the PEP, I need to decide the option name. I used PYTHONWARNDEFAULTENCODING (envvar name) / warn_default_encoding (-X option and sys.flags name) before, but it seems too long and hard to type, easy to misspell. Currently, I use PYTHONWARNENCODING / warn_encoding, but it is not so explicit. Which name is the best balance between explicitness and readability? * PYTHONWARNENCODING / warn_ecoding * PYTHONWARNOMITENCODING / warn_omit_encoding * PYTHONWARNDEFAULTENCODING / warn_default_encoding * Anything else Regards, -- Inada Naoki