Everything You Need to Know about Debugging in VSCode

This video is a quick guide to debugging Python scripts in VSCode. I’ll cover the basics of the VSCode debugger and show you how to use it to fix your code easily.
👷 Join the FREE Code Diagnosis Workshop to help you review code more effectively using my 3-Factor Diagnosis Framework: www.arjancodes.com/diagnosis.
💻 ArjanCodes Blog: www.arjancodes.com/blog
✍🏻 Take a quiz on this topic: www.learntail.com/quiz/xjfodd
Try Learntail for FREE ➡️ www.learntail.com/
🎓 Courses:
The Software Designer Mindset: www.arjancodes.com/mindset
The Software Architect Mindset: Pre-register now! www.arjancodes.com/architect
Next Level Python: Become a Python Expert: www.arjancodes.com/next-level...
The 30-Day Design Challenge: www.arjancodes.com/30ddc
🛒 GEAR & RECOMMENDED BOOKS: kit.co/arjancodes.
👍 If you enjoyed this content, give this video a like. If you want to watch more of my upcoming videos, consider subscribing to my channel!
Social channels:
💬 Discord: discord.arjan.codes
🐦Twitter: / arjancodes
🌍LinkedIn: / arjancodes
🕵Facebook: / arjancodes
📱Instagram: / arjancodes
♪ Tiktok: / arjancodes
👀 Code reviewers:
- Yoriz
- Ryan Laursen
- Dale Hagglund
- Kit Hygh
- Alexander Milden
- Bean
🎥 Video edited by Mark Bacskai: / bacskaimark
🔖 Chapters:
0:00 Intro
0:27 Setup
1:43 Breakpoints
3:53 Call stack
4:13 Variables
5:55 Watch
6:44 Outro
#arjancodes #softwaredesign #python
DISCLAIMER - The links in this description might be affiliate links. If you purchase a product or service through one of those links, I may receive a small commission. There is no additional charge to you. Thanks for supporting my channel so I can continue to provide you with free content each week!

[@ArjanCodes]

👷 Join the FREE Code Diagnosis Workshop to help you review code more effectively using my 3-Factor Diagnosis Framework: www.arjancodes.com/diagnosis.

[@cstephens16]

A whole series on debugging would be awesome. Seriously.

[@eduardolpz386]

This is great. A debug FastAPI video would be great too. Thank you for all your work.

[@leowalker07]

adding a vote for debug FastAPI with vscode

[@angeatgr]

there is nothing different when debugging FastAPI or Django app, even Flutter app for that matter. But VSCode will help you create the debugging setup.

[@ShanilPanara]

I've coded with VSCode for years now but never known how to use the debugger! Looks really powerful and I guess it forces you to code a little more carefully as well Gonna try to incorporate it in my dev workflow soon and see what difference it makes! Thanks Arjan

[@LiquidMasti]

Same I have been using vscode for years but never used debugger only used print statement or took my code to .ipynb to solve

[@wexwexexort]

I would love to see a debugging video for FastAPI and another video similar to this one but for pycharm.

[@dilliboy3366]

This is one of the most beautiful videos I have ever watched on debugging.

[@ArjanCodes]

I'm glad it was helpful!

[@kreglfromworld]

One thing missing that I find myself using a lot is the debugger console. Any time I'm unsure of how exactly to do something I use a breakpoint, run my ideas at that point through the debugger console to see what works, and implement it in code.

[@DagarCoH]

Did not know about the conditional break points. That is so useful!

[@michael_baron]

Same. For years I had no idea. :D

[@ArjanCodes]

Glad the video was helpful!

[@Iamsuperb4]

I'll definitely be using those from now on! Better than adding a temporary if statement and putting a breakpoint inside it 😂

[@mahamadinikiema9860]

Great work. A whole series of best practices for debugging with VSCode would be great. Thanks.

[@apsomething]

Would be great to see more advanced video about debugging!

[@chaseadal]

Fastapi debugging! Yes please! Fastapi with docker would be great too.

[@thefanboy3285]

Learning with you makes my brain tingles. It's like ASMR but with knowledge instead of sensitive stimuli.

[@ArjanCodes]

That's a really original way to put it! I appreciate the compliment :)

[@thefanboy3285]

@@ArjanCodes you're welcome. And btw, how do I pronunce the "Arjan" ? Arian ? Arj' an ?

[@Chaplainelmo2001]

Great ... enabled me to add several new tips to my own hard learned uses so far. VS Code formerly had a great "Preview" extension that visualized the call stack and allowed stepwise execution and display of function calls, returns, etc. I found that to also be a great assist in debugging as well.

[@user-pq9hh7yz1d]

Yes, we need separate video about debugging a FastAPI application

[@meqdaddev4341]

Thanks for the precise and high quality content. Keep coding dear Arjan.

[@ArjanCodes]

Thank you for the kind words!

[@mitchedmunds]

Great video! I think that it would have been useful to cover the debug console and also VS Code's testing pane where you can collect tests and then debug individual tests. It may have also been worth mentioning that you can Debug cells in the built-in Jupyter notebooks too - but these would be good topics for a follow up!

[@Piipolinoo]

Concise and straight to the point. That was an excellent video, thank you!

[@ArjanCodes]

Glad you enjoyed the content!

[@Doppelwulf]

I had no idea there were options for breakpoints. The conditional breakpoint is a big win for me, thanks!

[@ArjanCodes]

Glad the video was helpful!

[@eziola]

Thanks for these basic videos. Extremely helpful

[@ArjanCodes]

Glad you like them!

[@simeidoblinski]

Thank you very much! A video expanding on debugging a FastAPI application would be great!

[@PouriyaJamshidi]

Great video This is a topic that is almost never taught

[@ArjanCodes]

Glad you liked it!

[@ivanchan7769]

A debug FastAPI video would be great. Thank you for all your work.

[@rangabharath4253]

Awesome as always and very useful. Thanks 🙂

[@ArjanCodes]

Glad you liked it!

[@SiegfriedHirsch]

Nice help. FastAPI debugging would be great

[@marcelhulsberg501]

great video! I also frequently use the tebugging terminal (Ctrl+Shift+Y), where you can calculate expressions (similar to the watch section), but can also create and manipulate variables etc. the debugger also works great with pytest

[@gerardovelazquez9294]

Debugging python code inside docker from vscode will be great!

[@justchary]

Thank you. I learned something

[@ArjanCodes]

Glad it was helpful!

[@CharleswoodSpudzyofficial]

I love you Arjan!

[@robosergTV]

yes, please do a video about debugging FastAPI!

[@virtualraider]

debugging a Flask application would also be incredibly useful. A problem with most KZbin debugging videos is that they show how to work on simple scripts, but debugging an app running on a framework is way more complicated 😅

[@user-kv7pi8fw6p]

I would love to see a debugging video for FastAPI

[@diegol_116]

Ok I thought I knew everything related to Debug in VSCode...but it turned out I didn't...

[@claberone]

It would be really interesting to have a video on Fastapi and SQLModel as an ORM.

[@abdelghafourfid8216]

debuging FastApi or streamlit applications would be interesting

[@sany2k8]

Great content as always ❤, can you please add a debugging video with VSCode and FastAPI?

[@LunaSicilian]

I hope you talk about more request type in launch.json (attach, launch, remote debugging,....) and some advance topic like debug threading, asyncio debug, .... What you sharing in the video is simple, or just for beginer.

[@witcherek]

Yes, debugging fastapi and other framework will be super cool, please do it ;)

[@wizardfix]

Thanks for this! But what I have never managed to get working is debugging code running in a container (using Docker/Podman etc.). A demonstration of the setup for this would be very much appreciated (assuming you can figure it out!).

[@erikvanraalte4557]

How did you get the Python Debug Console in the editor pane? I love to open terminals in the editor area, but I haven't managed this for the Debug Console.

[@franco-gil]

More debug! On VSCode 👋

[@AlanBerman]

Please do a series on debugging

[@Brunojavaa]

Very good, how to debug in vscode when i run in docker?

[@niweshsah5337]

Make a whole series on debubbiging Please

[@joshbleijenberg4000]

Nice video, can you create a video on how to debug Django Rest Framework?

[@PaulaBean]

I'd like to use VSCode to attach to (and debug) running web services, written in python, which run in a container (docker or kubernetes) in the cloud somewhere (azure, aws), but it is unclear to me how to go about that.

[@kaelinellis1646]

How can I debug a file that I have to run from the command line? If it has imports from another folder, so I need to start it above the file directory.

[@CalmlyExplained]

You can run debugger in module mode. You define your settings via json file.

[@anibalismaelfermandois6943]

We want the fast API one!!!

[@anibalismaelfermandois6943]

I work with fast API along side docker compose. Any recommendations for debbuging and testing? I'm a bit overwhelmed with the amount of options.

[@LMGaming0]

Why using debugging for module instead of normal file? is there really a big advantages? and can we have a video with 3-4 different debuggers and when/why to use?

[@legion_prex3650]

hmmm, what is this star icon in line 8? right before return average_score? Is this some fancy icon for a breakpoint?

[@mitchedmunds]

I have a feeling it's something to do with Copilot, like a suggestion feature or something. I don't think it's relevant to the topic so I wouldn't worry for now.

[@fabrelambeau5858]

An idea for another video would be how to perform refactoring with VSCode. I used to use IntelliJ, and it seemed to offer quite a bit more. Maybe I haven’t yet found the right way in VSCode…

[@mohamedsalman4013]

Hey, It would be very helpful, If you make a video for Pycharm (FastAPI project)

[@Blackrobe]

I worked closely with Spark scripts, so I'm kinda sad that VSCode features like breakpoints and such can't really be used for example checking dataframes...

[@AntonsWorkshop]

Can you include a video about debugging modules?

[@fabrelambeau5858]

I found this one to be a little basic… is that all there is to debugging in VSCode? I’d be interested in knowing more advanced techniques.

[@shubhamsinghal4725]

Yes I'd like to watch FastAPI Debugging

[@_baco]

Debugging videos for FastAPI and Django, please!!!

[@danielschmider5069]

Please make a video about debugging inside a docker container, it's seriously hard to find a good tutorial on it

[@greob]

I’m still looking for an alternative to VSCode with a decent debugger… can’t figure out how to debug efficiently in vim or emacs. UwU

[@lucianogarbarino5240]

Please I would love to know how to debug a FastAPI app.

[@williamalarcon7994]

Hi, great video, could you make one showing how to debug apps made with poetry?

[@GOTHICforLIFE1]

i agree - i have major issues pointing to the python interpreter since its not in the same dir as the code base

[@mitchedmunds]

Should be fairly simple as long as you've set the Python interpreter to the one in the virtual environment that poetry has created. There is a setting in VS code called "Venv Folders" which you can set to wherever poetry is creating your virtual environments. Or you can change the poetry setting "virtualenvs.in-project=true" which will create a .venv in your project folder and VS Code will find it more easily when trying to select an interpreter.

[@adhd_arti]

I'm letting you know, I'd like to watch your video about FastAPI debuging

[@trupalcanada]

til about conditional breakpoint it should be quite useful

[@jancicruz7]

Should have showed what the launch.json file does. It's a requirement in many professional environments to debug with that prepared.

[@GuglielmoCerri]

Would be very useful a whole series on Django

[@danleedev]

Flask, please.

[@stevendecoeyer1987]

Every time I wonder so I just have to ask: what color iMac is that? 😂

[@sprintwithcarlos]

f5

[@quillaja]

There's a bug in your data. No way Austen is rated lower than Orwell.

[@brettvitaz9101]

“Everything you need to know” “These are the very basics” 😅

[@AyahuascaDataScientist]

It took all these years for him to make this video??? It should’ve been a day 1 topic.

[@younesveisi]

Hi Arjan. Please Create a Video for debugging in Flask App. It's very important for me and my work as a Back-end developer with Flask. Thank you very much for all of you Videos.