Make your Own Calculator in Python - Part 4 - Variables & Executing

In this video we'll be adding precedence to our calculator, adding support for variables and we'll be creating our run() function that will walk the parse tree perform the execution.

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[Nellak]

I'm so hyped! I'm making a parser to parse calculus expressions and other multivariable maths as an exercise and so that it's easier for me to express myself in code. I could easily import numpy or scipy or whatever, but where would the fun in that be?
Thank you for your lucid explanations!

[nitinmishra]

Thanks Man. I was just waiting for this part.

[bailinhuang]

Is there a way to get the token type from the parser? P[ i ] only gives me the value.

[eliezerben]

Isn't variable assignment an expression from a computer language perspective?

[biresths]

do you have some django video tutorial

[Inivican]

Before the making the run function it was actually able to print the sums but thereafter it doesn't appear to work.

[pacrii]

How is the `run` function dictating the order of operations?

[ThomasOrlita]

Absolutely I didn't get it. Bookmarked and will watch few years later. 😀