Need advice for INI parsing and validation

Question

My constraints

• A mandatory section
• An optional section
• A single-level section
• Only one identical option by section
• Text values that can look like this:
  Electric= yes6batteries
  Electric= yes4battery
  Electric= yes8solar_panel
  Electric= yes
  Thermal= no
• Conditional options, for example:
  Electric should not exist (or should be no) if Thermal= yes but must be if Thermal= no
• Need to get the number or the content of the error/conflict lines

I looked ConfigObj but I soon abandoned because not validated for Python3.
I started working with ConfigParser but I'm not sure to reach what I want.
So I ask you what you would do in my place or if there is a library best suited to my need.

Answer 1

TOML isn't exactly the INI format, but it looks almost like it. There's a python library for TOML, and it works with Python 3.