t_ignore_newline definition: The t_ignore_newline method is unnecessary because the regular expression r"\n+" is already handled by the t_ignore = " \t\r\n\f\v" statement. This line already tells the lexer to ignore all whitespace, including newlines, so the t_ignore_newline method could be removed to avoid redundancy. If the intent is to track line numbers (which seems to be implied by tok.lexer.lineno), you should ensure that's handled in a different part of the code.

fixed #1