Python Recursive Descent Parsing Calculator (Part 3 Addition and Subtraction)

This is my first ever programming tutorial series, so bare with me. In this series, I will introduce what a recursive descent parser is, how to elaborate on the context free grammars necessary for such a parser, and code a real example of a scanner and the recursive parser.

[floraarc]

I'm a little upset about the _array thing where it should have been _list, but I forgive you because I was able to tokenize a whole Grammar thanks to you. That's half my assignment. Cheers.

[marsahere]

You basically wasted so much time of these poor people life, and yet 4 more to go??