I tried to create a programming language... in python

I know you're wondering, why Python? Out of all other programming languages that exist? Just why?

Well, I chose it because it was simple, easy to use, and kinda intuitive, seeing that it felt like natural language to me. I also just learned it in a course I was pursuing in university and decided to give it a shot. It couldn't be that bad, right?

Actually, it wasn't bad, just a bit unfamiliar

You see, I've been creating my own programming languages behind the scenes. However, they were made in C++, which seemed like a more appropriate choice. Given that it's fast and offers better management of memory, performance, etc., you might ask, "So why didn't you just stick with it?"

I hated myself I wanted to expand my knowledge in Python and see what all the hype was about! So join me in this little endeavor of exploring the magic of Python programming!

Introducing pyp lang!

Pyp lang is a very complex and scary programming language designed to create anything you imagine with just one function!

Yeah, I wish it were that too, but in all seriousness, pyp is just a really fancy calculator that reads input from files and spits out the computed result.

We gotta start somewhere, and that somewhere is setting up our directory with simple Python files and a sample .pyp file for testing.

/pyp

   index.pyp - our source code file

/src

   index.py - our main file to run pyp

Our sample file - index.pyp

This file just contains a simple expression!

1 + 1

Our main file - index.py

index.py contains the code necessary for getting the source code from pyp/index.pyp. It turns out Python is really simple and abstracts away majority of the headache!

But first, we need a way to get the file path. So I tried out the pathlib and sys libraries to fetch it from the command line.

import sys

from pathlib import Path



# this is just a display help function when the file path isn't provided!

def display_help():

    print("welcome to pyp!")



# the guts of the whole thing!

def run_pyp_file(args):

    pyp_path = args[0] # we would fetch the pyp input file path here

    pyp_file_path = Path(pyp_path) # and convert it to a path!



    # if the file doesn't exist, we tell the user!

    if not pyp_file_path.exists():

        print(f"could not find the path {pyp_path} :(")

        return



    # and finally, we open the file for reading the source code

    with open(pyp_file_path) as pyp_file:

        source = pyp_file.read()

        print(source)



def main():

    # fetching the arguments from the command line

    args = sys.argv[1:] # decided to get rid of the index.py path



    # the arguments wouldn't have the pyp input file if the len is 0!

    if len(args) < 1:

        display_help() # show a helpful message

        return



    run_pyp_file(args) # run the guts!



if __name__ == "__main__":

    main()

Finally, running the result with this command:

python src/index.py pyp/index.py

Gave me this as the output!

1 + 1

We did it!!

...

What's that sys.argv thing?

Honestly, I'm still learning about the sys library, but it just represents the command line arguments as a list!

# sample.py

# when printing sys.argv, it gives you a list based on what you provide via the command line

print(sys.argv)

If we run the above with the command python sample.py in the command line, it would print the following:

['sample.py']

If you'd like to try it yourself, you can copy the snippet and run it with more arguments! Try this one in the command line:

python sample.py hello world

You should see:

['sample.py', 'hello', 'world']

More information about sys.argv below.

argv

What on Earth is it!?

Edit: If you can, will you please write a line or two and explain how it works?

Vollständiger Original-Bericht

Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf dev.to.

↗ Original-Artikel auf dev.to lesen

Wie bewertest du diesen Beitrag?

1 Klick Feedback

Hot 0 ️ Patch Now 0 Hilfreich 0 🤔 Diskutieren 0

Teilen mit Netzwerk & Team:

𝕏 Twitter 💼 LinkedIn 🦋 Bluesky WhatsApp Slack / Teams 👥 Team-Invite Link kopieren 📸 Social Card

Hat Ihnen dieser Tipp / Anleitung geholfen?

👍 Ja, hilfreich! Feedback geben

Community-Analysen & Experten-Meinungen 0

Verfasse deine eigene Analyse, teile Workarounds oder diskutiere diesen Vorfall im Blog.

Eigene Analyse verfassen

Noch keine Community-Analyse verfasst. Markiere einen Textabschnitt oder klicke oben auf „ Eigene Analyse verfassen“!

Beitrag teilen Kopieren

Feedback Experten-Votum

Hot 0 ️ Patch 0 Hilfreich 0 Top 0

🔴 Akute Relevanz 🟡 In Evaluierung 🟢 Keine Auswirkung

Community Pulse: Relevanz-Einschätzung

1 Klick Experten-Votum

🔴 Akute Relevanz

🟡 In Evaluierung

🟢 Keine Auswirkung

Spannende Innovation

🔴 Akute Relevanz 0%

🟡 In Evaluierung 0%

🟢 Keine Auswirkung 0%

Spannende Innovation 0%

Verwandte Story-Cluster & Quellen (Vektor-KI)

Port 8095 Engine

1 Quelle

The Gemini desktop app is now available for Windows

↗ Analyse öffnen

1 Quelle

Setting up live captions stuck in Windows 11

↗ Analyse öffnen

1 Quelle

Burn Out, Or Fade Away

↗ Analyse öffnen

◀ VORHERIGER BEITRAG 1 Min

CVE-2025-21719 | Linux Kernel up to 6.1.128/6.6.75/6.12.12/6.13.1 ipmr mr_mfc_uses_dev state issue (Nessus ID 232678 / WID-SEC-2025-0453)

10

NÄCHSTER BEITRAG 11 Min

SSH Config File Mastery: Turning `~/.ssh/config` Into a Productivity Tool

26 Weiterlesen ▶

Tipp: Mit Pfeiltasten [ ← ] und [ → ] blättern