| lex: Invalid regular expression for rule 't_POUND'. unbalanced parenthesis | |
| lex: Make sure '#' in rule 't_POUND' is escaped with '\#'. | |
| Traceback (most recent call last): | |
| File "./lex_re3.py", line 27, in <module> | |
| lex.lex() | |
| File "../ply/lex.py", line 759, in lex | |
| raise SyntaxError,"lex: Unable to build lexer." | |
| SyntaxError: lex: Unable to build lexer. |