Talk proposal: Writing a Python interpreter from scratch, in half an hour.

[tushar-deepsource]

Title of the talk

Writing a Python interpreter from scratch, in half an hour.

Description

You use the Python interpreter every single day. It does a lot of things for you: checks that your code has valid syntax and is properly indented, imports modules from various locations, and runs your code instruction-by-instruction.

But if you've ever wondered how exactly it happens, this talk will teach you the entire process, by building a working python interpreter from scratch.

What format do you have in mind for your talk?

Talk

Table of contents

The plan is to write a really simple, but working Python interpreter that can run Python code, from scratch.

The concepts we'll be going through to build this interpreter:

• Parsing an indentation based language
• Why Indent and Dedent need to be tokens
• Writing a Recursive Descent parser
• Parsing literals: ints, strings, lists, dictionaries
• Parsing expressions
• Parsing function calls - print("Hello world!")
• Semantic analysis: removing invalid code
• A tree-walk interpreter
• Interpreting print() statements
• Running import statements
• File I/O: implementing open() calls
• Running json.loads() and json.dumps() on our hand-written interpreter

What domain would you say your talk falls under?

Core Python

Duration in minutes (including Q&A)

40

Prerequisites

A working knowledge of basic Python concepts would be good, since the talk will feature a lot of live coding.

Knowledge of any Python library is not needed.

Speaker bio

Tushar is a Python developer, author, technical reviewer and speaker.

Currently working at DeepSource, his main topics of interest are metaprogramming, static analysis, and type checking.

Twitter: https://twitter.com/sadhlife

The talk/workshop speaker agrees to

• [X] Share the slides, code snippets and other material used during the talk

• [X] If the talk is recorded, you grant the permission to release the video on BangPyper's YouTube channel under CC-BY-4.0 license

• [X] Not do any hiring pitches during the talk and follow the Code of Conduct

[anistark]

Hi @tushar-deepsource
Are you willing to present this in July meetup?

[tusharsadhwani]

Sure, but I'm out of the country between 17 and 25. If the dates allow for it, I'd love to.

[anistark]

Oh. In that case, let me get back to you with date confirmations. Most likely it's on 22nd. But will confirm.

[anistark]

@tushar-deepsource It's on 15th July. Works for you?

[anistark]

Could you please also share your pic to be used in the promotional banner if you're ok with it?

[tusharsadhwani]

Works for me.

[tushar-deepsource]

Does this image work?

[tushar-deepsource]

I also have an uncropped version of this image somewhere. If you need that, I can get it.

[tusharsadhwani]

@anistark what's the venue?

[anistark]

@tushar-deepsource Image is fine. Thanks. Location is in Cyware, HSR. (most probably)