ConfigParser
Python has an excessive number of file parsers, especially given the PyPI. But there is just one standard library package that offers a configuration parser--configparser. The syntax expected by this parser is a conglomeration of many standards, and the parser has several large opt-in features.
Syntax and Syntax Errors
Sections
All options must be set under a section header. Section headers cannot be repeated, or the parser will raise configparser.DuplicateSectionError.
[Section1] option=1 [Section2] option=2
Options
Options and values are parsed as strings. The Option and value is delimited by either equals signs (=) or colonos (:). Spaces around the delimiter are ignored, but all other spaces are retained in the option and value. Options must be set with a value, even if it is empty.
[Section] foo=1 bar=abc baz=
If the parser is created with allow_no_value=True, options without values are allowed. When gotten, they return None. Otherwise, these options will raise configparser.ParsingError.
[Section] keyword-instruction
Options must be unique within a section. Repeated settings will raise configparser.DuplicateOptionError.