Enter a regular expression: $($aa$+$bb$)*$aaa

Traceback $($most recent call last$)$:

File $"$C:$\backslash$Users$\backslash$Jimbo$\backslash$RE$2$DFA.py$",$ line $12,$ in

dfa $=$ re$\_$to$\_$dfa$($re$\_$string$)$

$^^^^^^^^^^^^^^^^^^^^$

File $"$C:$\backslash$Users$\backslash$Jimbo$\backslash$RE$2$DFA.py$",$ line $7,$ in re$\_$to$\_$dfa

dfa $=$ DFA$($tree$,$ num$\_$positions$)$

$^^^^^^^^^^^^^^^^^^^^^^^^$

File $"$C:$\backslash$Users$\backslash$Jimbo$\backslash$DFA$.$py$",$ line $5,$ in $\_\_$init$\_\_$

self.build$\_$dfa$($root$)$

File $"$C:$\backslash$Users$\backslash$Jimbo$\backslash$DFA$.$py$",$ line $9,$ in build$\_$dfa

self.compute$\_$followpos$($root$,$ followpos$)$

File $"$C:$\backslash$Users$\backslash$Jimbo$\backslash$DFA$.$py$",$ line $15,$ in compute$\_$followpos

followpos$[$pos$]=$ followpos$[$pos$].$union$($node$.$rchild.firstpos$)$

~~~~~~~~~$^^^^^$

IndexError: list index out of range. this doesn't even compile, please give code that works. The original question isn't answered correctly does not give the correct output, i need code that compiles and outputs the correct output