split condexp_parser into parser_base
forgot to rename the condexp parser tests
move ParserSyntaxError to exceptions
move config attribute from parser base to condexp parser
comments, clean up, add missing debug attribute
rewrite range parser based on ply
extract checkErrors into a mixin class
add possibility to show exception messages in tests
add error tests for ranges
update todo
fix range usage, all tests pass
config is now set explicitly for condexp parser
fix debug flag not passed to yacc and do not write ply parser.out
rename methods parse_string and parse_range to parse
deal with unknown keys path in condexp parser
add TODO