> i also replaced the infixtopostfix to the problem:
>
> ("5 * 3 ^ (4 - 2)”))
>
> here is the error I am getting :
>
> Traceback (most recent call last):
> File "/Users/stephaniequiles/Downloads/Listings/listing_3_7.py", line 53,
> in <module>
> print(infixToPostfix("5 * 3 ^ (4 - 2)"))
> File "/Users/stephaniequiles/Downloads/Listings/listing_3_7.py", line 45,
> in infixToPostfix
> (prec[opStack.peek()] >= prec[token]):
> KeyError: '(4'
>
Ok. The immediate problem you are seeing here actually has nothing to do with
exponentiation, but with a lower-level issue.
Answering the following two questions should help you figure out
what's going on.
Given the string:
"5 * 3 ^ (4 - 2)"
1. What do you expect the list of tokens to be? Say concretely what
you expect it to be.
2. What does your program think the list of tokens is?
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