Simple Math Interpreter in Python (2/4) - Parser

In the second part of this short series, we create the parser, which transforms the tokens we generated in the last episode into a program tree. Our parser analyzes the sequence of tokens and takes into account the order of operations of different operators. For example, multiplication and division have a higher precedence to addition and subtraction.

[benmoreaucohen]

Hey guys, I want to tell you smth, well, for start, CodePulse videos are super great, they had taught me a lot, and, also, and the why of this commentary, I learned how to understand a code, a way that I hope can help others. This CodePulse serie and also the "Making a programming language in python" serie is very complete, but I must say it's quite advances, at least for, or at least it was. I was in that serie, looking into the parsing part, and I didn't understand a thing, why does it work, why does multiplying and dividing get first, I don't see it, then I came to this video and much others. And I learned that by writing the code, the functions you don't understand, in a paper, you can read it as if you were a computer, but you write every step. "So now I gotta go to x function, and the result is this, so again in the other... " bla bla, it helped to me understand this.

Again, great videos and thank you very much ;)

[toequantumspace]

I like Your previous lecture on the language, but this one is even better and more pythonic.

[JackMCGamerAnimations]

Great video and explanation. You deserve more subscribers!

[danielepaschetta]

I want to create my own programming language for a school project and this tutorial and the programming language tutorial are setting my mindset for this project,

thank you!

ps your explanation and how you do thinks are amazing

[shawneiharris]

Yes his subscribers will come. I just subscribed. Great content

[cheongkoo]

Amazing. Thank you. I just implemented a truth table inference engine by following your example and I can understand the code! :)

[quinndtxd]

Good work, I'm loving the videos

[pandadunks]

THANK YOU SO MUCH <3 you saved my life. subbed

[JapaDuh]

4 Years old video, but still helpful! Please make some new videos

[Andre-czur]

Are you going to make an os coding tutorial?

[Stormtrooper]

bros type speed is insane how you do that

[patryk_]

8:30 you didn't need to check the condition second time.

[tcholly]

the problem is that you can't do something like 2 + 2 + 2, it gives you only (2+2)

[Mx-gvnm]

Hello, can I know what type of parser u used in this video?

[BILLPC]

is it possible to do this without class jiberish? (sorry just gets confusing)

[YsKCreations]

Hi, Can we turn this project in to a math formula solver? For exsample, in "20=10-2x" find x's value?

[ianyourgod]

another way to do this: print(eval(input())) :)