Parse a single string as traceback line

def parse_line(string):
    """Parse a single string as traceback line"""
    match = line_regexp().match(string)
    if match:
        matches = match.groupdict()
        line_number = matches['line_number']
        path_to_python = matches['path_to_python']
        spaceless_path_to_python = matches['spaceless_path_to_python']
        if path_to_python:
            return path_to_python, line_number
        elif spaceless_path_to_python:
            return spaceless_path_to_python, line_number