How variables work in Python | Explained with Animations [See description/first comment]

The same video is re-uploaded with better audio and minor corrections: • How variables works in...
This video tries to explain how variables or name bindings work in Python and their internal representations like PyObject and PyVarObjects, using animations.
Intermediate level concepts like reference counting, garbage collection, how lists work internally, why python is a dynamically typed language, interning, None objects, equality operators like '==' and 'is', how 'del' works, how variables are passed into functions(pass by reference), issues with default mutable parameters, operator overloading and behaviour of augmented arithmetic assignment operators, the behaviour of mutable element in the tuple are also explained.
It also shows how mutable and immutable data types behave differently in some scenarios. This knowledge should be useful for people coming from other languages like C, Rust, or Golang and may enable them to write better Python code.
References
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comments in CPython source code: github.com/python/cpython/blo...
Chapters
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0:00 How variables works in C
0:49 How variables works in Python
3:12 How lists are represented internally
5:37 Interning
7:12 Equality operators
8:13 Pass by reference to functions
9:18 Mutable default parameters
11:24 Augmented arithmetic assignment operators
13:12 Mutable elements in Tuple

[@sajjadhossan7972]

You really have an unique way to teach with deep understanding about programming. Please continue with your work. We wants to learn more about python from you.

[@maksymilianbiruk6877]

I have never seen such a better explanation than this before! Thank you so much for this video.

[@me-jn1zl]

I have seen 4 of your videos in a row... THEY ARE EXCELENT!!! you are a great teacher... Please continue uploading such quality videos 🙏 HAVENT SEEN ANYTHING SO WELL EXPLAINED AS YOUR VIDEOS

[@ahmedouerfelli4709]

This channel is underrated.

[@AnantaAkash.Podder]

This by far the Best... In terms of explaining how Python Variables are Stored

[@kraken3950]

Thanks. I have been coding in Python for years and only learn this piece of fundamental knowledge from your video.

[@maxciencomp]

Incredible material, very clear! Thank you so much for this!

[@neoruss3553]

Watched almost all videos on advance topics of python. Even though i never used python i can say these advanced topics are same or very similar for 90% of other programming languages, so learning it once means you can use it in any other language.

[@AnantaAkash.Podder]

You really do have an Unique way of Explaining things to others

[@jannickharambe8550]

holy shit this is really really good ive googled for quite a while now and couldnt find any good explanations thanks so much

[@abhisekrout976]

Very well explained. Your videos deserve more views.

[@JosueZelayah]

Dude you nailed it! Excellent work!

[@halciik]

This is what i wanted to know! Thanks!

[@arpankarmakar15]

You really understand python deeply! Great

[@DjWhitefoxMadrid]

Must watch tutorial. Please keep it up with more like this. Thank you!

[@iliya-malecki]

Outstanding video, its like an ascii table that some nerds print and hang in their bedrooms - the quintessential information. I will save this video on a flash drive and will put it on my bedside table

[@sanv9853]

thanks for putting together this explanation, after going through countless beginner tutorials i hit gold

[@adityachoudhari1158]

Thank-you! It's what i was looking for.

[@didimomani1565]

u r great , I really didnt understand from anyone on youtube just you

[@kakarot1223]

great video mate, never knew about all this despite using python for some while

[@rvoros]

absolutely spot on explanation with excellent examples

[@jakub1908]

Keep going, great job!

[@clipdat345]

impressive explanation, thank you!

[@RahulSharma-lw2ss]

Very exceptionally explained. Thankyou

[@cb9493]

Best explanation ever, thanks a million!!!!

[@sidlas420]

Very good visuals. However a small suggestion that it would be even more impactful if you explained it rather than a robotic voice reading through the statements.

[@sreekanthpr]

Thank you. I used text to speech conversion because of two main reasons: first is that I don't have a good enough setup for recording audio and this is much easier, second I'm not a native english speaker, so some people may have difficulty with the accent.

[@sidlas420]

@@sreekanthpr - You are a very thoughtful person. Thank you for the extra effort you have put in

[@rainforest3233]

@@sreekanthpr I like your content! Really helpful!! Maybe you can consider hiring someone or using a more natural voice.

[@xiam19]

Its perfect you just need to adjust the speed to 1,2x😅

[@13MrMusic]

Extremely enlightening! Excelent job, extremely well done! It was very helpful

[@winterwilderness5073]

Very thorough explanation and vivid visualization. Thank you so much for your efforts in producing such extraordinary contents!

[@MAMUN-zo9tv]

Just wow 😍😍😍😍

[@sudarshanvkudli9250]

This 15 minutes taught me more than what I learnt in a semester

[@user-rh8zz4jh2l]

It's a usefull lesson) I am the beginner in Python and as for me, this lesson was very interesting) Thank you, my friend for your work)

[@sureshonteru4609]

This video helped me a lot , Thank you so much. Am requesting you create a more videos in python

[@arlaxia]

Really great animations and explanations. It was really informative and visual.

[@nunorodrigues5628]

awesome video mate

[@sungchulyonseiackr]

Simply Great!

[@sreekanthpr]

*The same video is re-uploaded with better audio and minor corrections:* kzbin.info/www/bejne/eKuWmqVjq7Ckoc0

[@priyankagupta119]

Your videos are very helpful and give me deep understanding of the concepts in Python. Request you to please make a full playlist of Python-Basic, Medium, Advance concepts. Thank you so much !!

[@polarbear986]

Very good explanation !!

[@gena8414]

very interesting. covers the memory model of python variables really well. Now I can predict the behaviour of code by drawing out a PyObject pointer diagram.

[@AnupSPai]

this helped me a lot, thank you so much!..

[@witoldzolnowski7067]

great content, keep up the good work

[@artemtitov8657]

BRO U ARE CRAZY!!! ITS FIRE!!! Where do you get such detailed information from? only the source code?

[@MagnusAnand]

This is a fantastic video and explanation

[@boutiflet]

Awesome !

[@jpsan1735]

Thank for your video. It help me a lot to understand the core of python :33

[@orgoon7697]

Outstanding, thx

[@sozo4755]

it's very helpful content, thanks

[@sohailshah1574]

Please more videos related to python.. what a visualization Thank you so much sir

[@richardharris202]

such a underrated video! what is your linkedin bruh!

[@Pedritox0953]

Great video!

[@manishjain6294]

Hey Sreekanth. The video is too good. Which book do you read? Request you to give the source of this please.

[@user-xj8oy3kh4g]

great job!

[@ahmedghallab5342]

شكرا جزيلا 💙💙💙thanks

[@AnantaAkash.Podder]

Thank You Sir...

[@lilyzheng2322]

this make so much sense

[@fratquintero7402]

Please, make more videos! You are awesome!

[@sreekanthpr]

Thanks. I'm working on the next one. Will try to upload it this week itself.

[@JohnWickXD]

Thanku so much!

[@M.I.S]

thank YOU!

[@umi_nari]

great video thks 🙏

[@Yassine-it6rp]

so good man

[@vvuonghn]

This video is awesome

[@hrtrfli2702]

İt is usefull ,so much , thank you very much.

[@sohailshah1574]

Please more videos related to python.. what a visualization Thank you so much sir ... And one more thing, can i use your visualization for Instagram post?

[@olivierTUBO]

Thanx for doing this

[@catchalok3]

This is by far the best explanations which I have come across. Sometimes, speech is fast. For this, I am using playback speed of "0.75" and it works very well for me.

[@mohammadarshad8301]

I think he has purposely increased the speed because of 2 reasons: 1) He is aware of the fact that when the KZbin video is watched slowing down, it gets recommended to much wider audience and watch time increases. 2) He is confident about the content and so think that no one will think to let go these videos just because it's little' bit faster.

[@biswajitdas4214]

Awesome beautiful

[@TechTutorialswithPiyush]

That was really amazing, would you be able to share the tools you have used for recording, is that a powerpoint or any other tool? Which application you have used for speech? Really impressed with the way you have delivered! Nailed it

[@sreekanthpr]

github.com/3b1b/manim for generating the video. One note >> view >> immersive reader for the audio. Davinci resolve for final mixing of video, audio and subtitles

[@TechTutorialswithPiyush]

@@sreekanthpr That's awesome! Thank you very much for sharing. I wish you a great success ahead for your channel

[@wellhellothere1785]

great video I would slow it down a little bit more, but overall the content is great. Thank you

[@armanmalkhasyan4765]

Thank you very much

[@johnlemon9660]

thanks bro! these topics rarely get touched as well as rarely taught visually well. what did you use to make these animations?

[@sreekanthpr]

I use github.com/ManimCommunity/manim to generate the video.

[@khardu]

Thank you for sharing your hard-work and knowledge for free. Could you please make it a little slower for your future videos. It's hard to keep up with the pace for python beginners and non-natives like me.

[@akmzahidulislam2764]

Excellent explanation. Thanks a lot. Correction: At 9:08, the name of the function should be the same, ie add_ten_to_list. Mistakenly mentioned as add_one_to_list.

[@stephanosc7728]

Clear

[@ahmedsamir-qw1zp]

too much helpful, and excellent demonstration ... could you send a reference on this topic to go deeper, please

[@adrianosymphony]

in the time 07:01 (about 'some string' and 'some_string') don't work the same way if you run the code in a file and typing line by line in the interpreter. I tested here in some versions of python and the result was the same. Chat GPT told me why this heppended: "...when you run the code line by line in the Python interpreter, each line is executed independently, and the variables may not be stored in the same memory location. The Python interpreter, especially in interactive mode, may reuse memory for string literals that are equivalent. This is an optimization mechanism known as string interning."

[@tanmaychavan743]

Why did you stop uploading videos 😢, they are so damn Good than any other channels.

[@user-qs2xl7td2r]

Is the term object and value in python equivalent? Or object consider a box and a value is what the box contained?

[@t.m7617]

04:20 will the PyObject(s) reference count remain 1 no matter how many variables I assign to the PyVarObject?

[@zeinabezz1426]

First, I'd like to thank you about your very powerful videos You say that list are stored in arrays... But what about tuples, sets, and dictionary??

[@mishalpatel514]

Nice!😊 Could you please tell me from where did you learn this?

[@sreekanthpr]

Comments from Python interpreter's source code github.com/python/cpython/blob/f572cbf1faab33d9afbbe3e95738ed6fbe6e48e6/Include/object.h#L9 and some specifics I started to notice when I learn another language and come back to Python.

[@mishalpatel514]

@@sreekanthpr That's so cool man! Please keep making more videos.😊

[@ttoommxxmmoott]

I wonder how had the brilliant idea to create the += operator, it's just extremely confusing unless you know exactly what you are doing

[@mehdichellak4373]

I type the same code as you: x = 42 y = 42 print(x == y) # true print(y is x) # true print(id(x), id(y)) x = -257000 y = -257000 print(x == y) # true print(y is x) # true print(id(x), id(y))

[@AA-cr6gd]

6

[@itsmaxim01]

me using try {} catch {} to push items to the immutable array:

[@innercircletradertevision]

I am tired

[@sohailshah1574]

Please more videos related to python.. what a visualization Thank you so much sir