Pyparsing ignore except

Question

I have a file, with pythonStyleComments in lines, for example:

def foo(): # declare
    # Simple function
    a = 0 # TODO: add random
    return a

So, then I want to add .ignore(pythonStyleComments) to pyparsing, but want to handle any meta (such as TODO: ). I know all meta words, so how I can exclude this comments from ignoring?

Maybe declare comment as '#' + Regex(), where Regex would be exclude meta words? Or pyparsing has more elegant method?

Answer 1

I have just declared comment = Literal('#').suppress() + Optional(restOfLine)

and then add it as Optional(comment) to the end of each statement, where it could appear. Then add

def commentHandler(t):
    result = []
    if "fixed" in t[0]:
        result.append("fixed")
    if "TODO: " in t[0]:
        try:
            message = t[0].split("TODO: ")[1].strip()
            result.append(message)
        except Exception as e:
            result.append(t[0])
    return result

comment.setParseAction(commentHandler)

So it works perfectly for me.