<s> import sys <EOL> if "<STR_LIT:..>" not in sys . path : sys . path . insert ( <NUM_LIT:0> , "<STR_LIT:..>" ) <EOL> import ply . lex as lex <EOL> tokens = [ <EOL> "<STR_LIT>" , <EOL> ] <EOL> literals = [ "<STR_LIT:+>" , "<STR_LIT:->" , "<STR_LIT>" ] <EOL> def t_NUMBER ( t ) : <EOL> r'<STR_LIT>' <EOL> return t <EOL> def t_error ( t ) : <EOL> pass <EOL> lex . lex ( ) </s>
