pyparsing.pyparsing.ParseSyntaxException:
just like ParseFatalException, but thrown internally when an
ErrorStop indicates that parsing is to stop immediately because an
unbacktrackable syntax error has been found
pyparsing.pyparsing.Keyword:
Token to exactly match a specified string as a keyword, that is, it
must be immediately followed by a non-keyword character.
pyparsing.pyparsing.WordEnd:
Matches if the current position is at the end of a Word, and is not
followed by any character in a given set of wordChars
(default=printables).
pyparsing.pyparsing.WordStart:
Matches if the current position is at the beginning of a Word, and
is not preceded by any character in a given set of wordChars
(default=printables).