Learn more about how to launch a software product faster here: kzread.info/dash/bejne/f4lmksOhZdafp9o.html

@AlexB-op7kb

3 жыл бұрын

Remind Me! 1 week

@javierfry97

Жыл бұрын

@@AlexB-op7kb how goes it?

@AlexB-op7kb

Жыл бұрын

@@javierfry97 haha remind me 1 year. I forgot to follow up

Believe me. There are no videos on youtube other than you to my knowledge that explain the design pattern before and after effect with real practice examples . Thank you so much !

@ArjanCodes

3 жыл бұрын

You're welcome Kannan, happy that you're enjoying the videos!

@muyewahqomeyour7206

3 жыл бұрын

I third this

@ZeonLP

2 жыл бұрын

True! I have only seen very abstract examples that almost completely overlap with the pattern description. Not bad, but real world examples are much more insightful once you get the general idea.

@MaBuSt

2 жыл бұрын

have you found any more? This is also exactly what I was looking for. I am concerned his newer stuff is a bit more faster-paced, but still good. I know we can slow the videos down, but this isn't about teaching us 'what to do', this level is all about 'how to think' is this video is a really really great example of this. Looking for more samples around the web if you found them

@andgate6204

9 ай бұрын

aws re:invent has some really good videos on software development, way beyond this. However, arjan’s video is great if you’re still at the level where you need practical examples.

Thank you for not making 'hello world' tutorials!!!!!!! Keep going! :)

@ArjanCodes

3 жыл бұрын

Thank you! Will do :)

@jsallan7

3 жыл бұрын

Agreed! Thank you Arjan, this is super helpful stuff!!

Honestly, this is some of, if not the best, intermediate/advanced level content out there! Too many people focussing on the pure basics, but you presented this in such an easy to understand way! Forget binging Netflix, time to binge Arjan 😂 Thanks a lot ❤️

This is exactly the sort of level of information I need at my stage of learning to code. thank you so much really appreciate the thought you've put into this!

@ArjanCodes

3 жыл бұрын

Thank you! Happy that you enjoy the videos.

@larrytroxler7017

2 жыл бұрын

I'm glad you got something out of this , but read my post.

@mrdupreez9061

2 жыл бұрын

@@larrytroxler7017 Can't see your latest comments, so I can't unfortunately. Why don't you make your own video?

@MaBuSt

2 жыл бұрын

were you able to find any other examples of this level of code teaching? This is where I landed too.

Highly Underrated Video, should have more than a million views. There are very important concepts which programmers don't even know. Thanks for the High Quality Content !!

@ArjanCodes

3 жыл бұрын

Thank you Talha, I’m happy you’re enjoying the videos!

@larrytroxler7017

2 жыл бұрын

True, but as a explained in my initial reply, there are some problems with this guy's post.

I absolutely love this channel. I have always really struggled with the idea of trying to identify what "intermediate" level coding is, and I would say this channel really fills that gap in the existing KZread literature for python coding. I think this channel is going to really level up my skills, can't wait to see more!

@ArjanCodes

3 жыл бұрын

Thanks Dennis, I’m glad you’re enjoying the videos and that they’re helpful to you.

@Dgrayfit

3 жыл бұрын

@@ArjanCodes Certainly very helpful! Do you have any other ideas in the pipeline for content that we can look forward to?

@ArjanCodes

3 жыл бұрын

Absolutely :).

@MaBuSt

2 жыл бұрын

did you find any other channels that are similar? I did not but I am also looking to do much better here as well at this level.

It is not even possible to get this kind information from paid sources, but you are great person that making these kind of valuable lessons available on youtube. Thank you very much for all the effort, Respect.

@ArjanCodes

3 жыл бұрын

Thank you, Space Walker - glad you like the content!

Great video. I'm a data scientist but moving more and more to software development. I'm still having a hard time writing good code, but I'm starting to be able to recognize it when I see it. Videos like this are super helpful with that.

Love your work man. Your calm and clear delivery is a breath of fresh air. Keep it up.

Fantastic series! I think all of the concepts you're discussing are vastly under-appreciated

Your videos are absolutely amazing! I can only imagine how much work and hours you have put into this. Thank you for sharing your knowledge to all of us learning Python!

This is a such a great series! I've been looking for intermediate level design content for years. You've nailed the delivery and content. Looking forward to seeing more videos.

@ArjanCodes

3 жыл бұрын

Thank you Cristian, happy you are enjoying the series!

@Victorinoeng

3 жыл бұрын

Completely agree! Loving this series! Looking forward to more videos! Great job!!!

Your videos have changed the way I code. This is my second time going through this playlist. Since watching your videos I have been writing better code. Trying to do better every time. I have even done better at interviews. Thank you so much for great content. Merry Christmas and Happy New Year!

I noticed cohesion and coupling are pretty similar to the concept of between and within dispersion in cluster analysis. Kinda cluster should be maximized by between-cluster distance and minimize by within distance of elements inside. Why I noticed this only after your video? Your explanations are really genious.

@robharwood3538

3 жыл бұрын

Nice observation! It makes sense to me.

I was so frustrated of going through tonnes of leetcode interview exercises/tutorials and was looking for a more philosophical understanding of how to design python codes. Then I found your channel, I am now more confident after going through some if not all of your videos. Keep it up! The coding challenge is soon, will update if your content helped me land the job.

@marookegberosamuel8238

2 жыл бұрын

Did you land the Job yet ?

@hudabdulwahab2499

2 жыл бұрын

@@marookegberosamuel8238 I did! but unfortunately (or fortunately) it's not just python - so a lot of learning curves!

This is what I was looking for almost a year. Thanks, Arjian.

your work stands out in flood of basics tutorials with silly examples, thank you Arjan!

You create the Best videos on refactoring, design patterns, OOP, thank you a lot!! Most of the videos on youtube are very basic, with ridiculous, generic "foo", "add_numbers" etc. examples, but you show real, practical examples, and superb refactoring, just as if we asked a senior mentor to review our junior codes and recommend improvements. You are creating fantastic videos, thanks a lot!!

Holy cow, this is first video that I am subscribing, liking and sharing right away. This is a gem. Thank you very much Arjan.

@ArjanCodes

3 жыл бұрын

Thank you very much! I’m happy you liked the video.

Fully agree. Basic concepts like this are highly undervalued by many devs since they struggle to grasp the rather abstract benefits. Unfortunatly todays high demand on devs also has lead to many people working in this field now who better should not be writing code for a living.

Im really happy to have found this channel, I'm really enjoying this Better Python Code playlist!, thank you!

I can even tell how much I love your content sir, thank you for creating these videos all for free, you are a hero.

@ArjanCodes

3 ай бұрын

Thank you for the kind words, Mikaeil! I'm glad you like the videos :)

This series is great, both the topics and your way of explaining stuff. Thanks for taking the time to make these!

@ArjanCodes

2 жыл бұрын

Thanks Pim, glad you like it!

Absolutely outstanding video Arjan! I've been coding Python for ~5 years and always saw these techniques in play but never really knew where they were coming from. Looking forward to the rest of the series.

@ArjanCodes

2 жыл бұрын

Thank you so much, Daniel, glad you enjoyed it!

Great stuff, thank you!! I really appreciate this kind of intermediate+ material. There is very little available. Looking forward to the rest of the series.

@ArjanCodes

3 жыл бұрын

Thanks! Happy you liked it!

This is some really good quality video. You covered so many concepts , thanks

Sir, you are really amazing teacher. Your teaching style is very explicit and clear. But there are several other parts of the programming world I would like to learn from you, and these are (mentioned based on my interests) 1) Data Structure and Algorithms 2) Programming along with any GUI Library (I prefer tkinter) 3) Also teach us about Databases (SQL , NoSql (mongoDb etc)) Thank you Sir, I hope, We'll be blessed with these videos in future.

I just discovered your channel, I always found Design Patterns boring, but I watched almost all your videos about it. Thank you, you make it very playful and concrete and the rhythm is also perfect !

@ArjanCodes

3 жыл бұрын

Thank you so much! I’m happy that you’re enjoying the videos.

One of the best content. Thank you so much for sharing your knowledge. I am going to watch all of your other vedios. Please keep on the great work.

Words can't describe how awesome your job is. Watching your videos makes me want to refactor all my shitty code

Dear Arjan, thank you for sharing such a detailed and thoughtful video. I loved how you explain the though process of improvement. It's hard to find such content out there. Please keep going. I look forward to studying all of your catalogue (see what I did there!) ;)

great walkthrough. the example code really demonstrates the concepts

You are a god for uploading this series. Starting out as a python developer, I found myself coming across difficult issues when returning to old code I've written where better understanding of design patterns could've helped. The very few tutorials covering this stuff are either long form lectures, and the best books on software design use Java as a reference. This is such a great niche that you're tackling and I hope your account accrues more subscribers and viewers. Thank you!

@ArjanCodes

3 жыл бұрын

Thank you so much - glad you like the content!

I'm so grateful to have found your channel. Very great content. Thank you very much! Cheers from Brazil!

@ArjanCodes

2 жыл бұрын

Hi Goulartto, I'm happy to hear you like the content - cheers!

I hate python but I watched the video anyways because nowadays almost nobody talks about cohesion and coupling. As you stated, the concepts shown apply to any language since they are abstract, language independent ones. Grats!

Great video. I wish I knew about your channel long before now. Thanks a million!

This series is gold

thanks a lot for your videos, they're really crystal clear!! :D

First person I've subscribed to in over a year. Great videos sir :D

@ArjanCodes

3 жыл бұрын

Welcome aboard!

This is such a great series. Thanks so much!

@ArjanCodes

3 жыл бұрын

Thank you Erik, happy you are enjoying it.

Great stuff Arjan! You got a new subscriber! Groetjes uit Den Haag!

Yes please. Can't even believe you made a reference to bridger and template pattern. Fantastic.

@ArjanCodes

3 жыл бұрын

Thank you!

Exactly the kind of content that so many are actually looking for!!! If we have developer jobs without great code-review and training practices, we are stuck trying to figure out how to improve our code quality by ourselves. This is appreciated 1000x. Something I'd please ask going forward, and the reason I am responding in THIS video instead of your others - please don't go TOO FAST in your videos. This video was a great speed and I am concerned that in some of the vids you have made since that you are moving too fast. Please remember that this isn't about 'how to do' something, it is about 'how to (structure your) thinking'. This takes time to settle into the brain and the programmers watching are constantly trying analyze the 'why' of what you are doing and fit it back into their own models. Please use this type of video pacing as an example in your newer videos. Also, please always debug on screen, we've all been there and it is really great to watch what you do too.

Super thankful of this content!

Well well done! You've got another fan here. I'm digging your videos.

@ArjanCodes

3 жыл бұрын

Thank you @cocoonk1d! I’m glad you like the videos!

This is great. Thank you for your videos!

Found it, watch it, love it. You're awesome!

@ArjanCodes

2 жыл бұрын

Thank you, glad to hear you liked the video!

Thank you Arjan for sharing your knowledge in such easy and clear way, appreciate

@ArjanCodes

Жыл бұрын

Thanks so much Jakub, glad the content is helpful!

Very clear. Thanks a lot.

What a really great topic that no one ever seems to discuss. And very well presented. New subscriber.

@ArjanCodes

3 жыл бұрын

Thank you Chuck, happy you like it.

Thanks for a tutorial. It's really very useful and unique.

this is very perfect constringe of python code that I never have it's so amazing, it has more knowledgeable pattern design

@ArjanCodes

3 жыл бұрын

Glad it was helpful!

This really pulled the concepts together for me.

@ArjanCodes

3 жыл бұрын

Glad to hear it was helpful!

Very challenging, yet very interesting, and great to learn and understand. Thanks

@ArjanCodes

3 жыл бұрын

Glad you enjoyed it!

Good channel with very very good content!! Keep sharing your knowledge like this Arjan!!! Thanks so much!!!

@ArjanCodes

2 жыл бұрын

Thank you Leonardo, glad you like the content!

One interesting concept to add to this: We could define the string we print as the return value of the __str__ method of the class instead. Then in print method of the class put print(self). That way we can both print the str with a call to print or get the str as an output to write somewhere else with str(instance)

@janekschleicher9661

Жыл бұрын

Usually the way would be to overwrite both, the __str__ and __repr__ (the latter should contain a representation similar how we would reconstruct the object in python). __str__ overwriting should be done carefully and usually keep it as simple as possible. Most often, we would not want to have a formatted string containing arguable design decisions. Especially, having newlines in __str__ should always taken with some careness. If these objects are included in other objects, you'll start having problems visualizing them without getting corrupt visualizations. Just think about printing out a little table as one example. There are useful exceptions, e.g. pandas dataframes, so they work very well with interactive environments. Here I'd argue that __str__ should just contain the information a bit more minimal in a one liner. Nowadays in recent python, we'd usually just define the data classes as dataclasses and then we'll automatical get a useful __str__ and __repr__ and __init, what reduces the need to even think and debate it. The usual way to deal with a pretty printing or a formatted output is to add a formatted_str or similar called function. One reason is also, that you want to influence the formatting with options (and you can't really do that in __str__). E.g. whether you want a colon there, or maybe you want output it as a csv (so you can pipe into a database). Indeed, very often, you could even think about delegating it to a specialized library like python-tabular or similar. Anyway, the only thing I really disliked in this video is to call the method "print". I would always suggest, especially to learners, not to use any keywords or global function names as function names. Even if it fits the purpose of the method very well, the chance for both confusion and hard to debug errors is significant. You can even see it in this video. There are three prints in three consecutive lines: the first is in a method name declaration, the 2nd one calls the global standard python print and the 3rd one calls the print method of another object. It's even worse that the three methods will do something similar. It's only a question of time till the wrong print is used, not caught immediately and the ending up in a subtle and close to impossible findable bug. I mean, you still can call print(vehicle) or vehicle.print() that both will do something similar, but different. Anyway, this video is outstanding good!

Excellent video. Thank you very much for this serie.

@ArjanCodes

Жыл бұрын

Thanks so much Das.

8:00 this is excellent advice, just what I needed tbh. think about the data first before doing any coding, let the data and their relationships guide the program structure!

Immensely helpful and well explained! Thank you so much...looking forward for more 😃

@ArjanCodes

Жыл бұрын

Thanks so much Connor, glad the content is helpful!

There are a few design things I feel like I'd change: 1. As others have mentioned, Vehicle and VehicleInfo would be good as dataclasses. 2. Using enums instead of a boolean "electric" flag. This would allow for adding more vehicle types in the future, such as "hybrid" or "diesel," if one needs to differentiate the two. 3. __str__() is much cleaner when printing stuff, rather than using a unique print() method. This is obviously a boon if, as you said, one wants to develop a GUI.

This is outstanding content, creatively and articulately presented. Bravo.

@ArjanCodes

7 ай бұрын

I'm glad you enjoyed the video!

This video is underrated. Well done!

@ArjanCodes

3 жыл бұрын

Thanks Benjamin, glad you liked it!

20:26 Truer words have never been spoken 🙏🙏

great video man! helped me out a lot! Thank you

@ArjanCodes

3 жыл бұрын

Glad to hear it!

I'm learning a lot from your videos - thanks.

@ArjanCodes

2 жыл бұрын

Glad to hear the videos are helpful!

Thanks for this info series. It is nice to know the CS terms for some of the things I have learned from practical experience. In particular, a favourite of mine is to store the info and related methods in an Enum. In this case I would have defined `class Vehicle Registry(VehicleInfo, Enum)` and define the different type of vehicles as Enum members.

@larrytroxler7017

2 жыл бұрын

Exactly. You should never store classifications like these as bools. His final code would never pass a software review.

I love seeing beautiful code. Thank you for this!

@ArjanCodes

3 жыл бұрын

Thanks Mark, glad you liked it!

@larrytroxler7017

2 жыл бұрын

It is not beautiful code, unfortunately. See me latest comment.

Thanks man really wished I'd learned this sooner

Nice video Arjan!

Great video! If we want to go further, we can create abstract class and give an object VehicleRegistry to the application and thus increase the decoupling We can also create another class to compute financial stuff like prices, taxes and even reduction and thus increase coupling.

Hallo Arjan. Dank voor je uitstekende uitleg zeer leerzaam ik ga de rest van de video's bekijken educatie moet vrij en toegankelijk zijn voor iedereen een kopje koffie komt zeker. Dank Khaled

@ArjanCodes

3 жыл бұрын

Graag gedaan, Khaled!

Thank you, Arjan. Superb content.

@ArjanCodes

Жыл бұрын

Thanks so much Ian, glad the content is helpful!

Fantastic channel !!!! Thank you!!! and keep it up !!!!!!!!

@ArjanCodes

2 жыл бұрын

Thanks Oscar, will do!

absolutely great video, thank you very much

@ArjanCodes

2 жыл бұрын

Glad you enjoyed it!

Easiest sub of my life.

@ArjanCodes

3 жыл бұрын

Thank you! And welcome onboard ;).

You could use dataclasses to save a lot of boilerplate. And I like to implement __str__ methods to print objects. But I guess you left that out to make it not too complicated. Anyway nice videos. Good to watch.

@ArjanCodes

3 жыл бұрын

Thank you! Yes - dataclasses are really helpful, as are the __str__ methods for printing. It's always a challenge to make sure the examples used to explain a concept do not introduce too many other 'new' things at the same time. I do think a video about these 'helper' libraries would be useful, as they really save you a lot of time.

@fuuman5

3 жыл бұрын

Yeah, that's an important point. But you are doing great at finding the right mix which is shown by your amazing growth over the last month. Will definitly follow your upcoming videos - keep going!

best best explanation ever

Thanks, Arjan!

As a senior dev in my team your sample code for bad example gave me a slight headache. But your explanation to all the changes made me way too happy. Thanks for the great content 👍. After completely watching the video this reminded me why people say good code doesn't need any mandane comments.

@ArjanCodes

3 жыл бұрын

Thank you, glad you liked the example (at least the after part ;) ).

Fantastic video! Thanks

@ArjanCodes

2 жыл бұрын

Glad you liked it!

Just found your channel! Your explanations are great!

@ArjanCodes

3 жыл бұрын

Glad you like them, Hash Marker!

Really amazing video. subscribed.

@ArjanCodes

3 жыл бұрын

Thank you! And welcome 🤗.

Excellent Video! Thank you

@ArjanCodes

3 жыл бұрын

You are welcome, Daniel!

Great explanation!

@ArjanCodes

2 жыл бұрын

Glad it was helpful!

Thanks a lot sir.

Very very usefull! Thanks a lot!

@ArjanCodes

3 жыл бұрын

Glad it was helpful, Fernando!

I love your videos so much

@ArjanCodes

2 жыл бұрын

Thank you - glad you like them!

Thank you for the great video about cohesion and coupling, I can learn a lot from these videos about code structure design. One question about the types you added at minute 10:00 to the classes. When to use it that way compared to when using it directly in constructor e.g.: __init__(self, x: str)?

Best explanaition, thanks

@ArjanCodes

8 ай бұрын

I'm very glad it was helpful, David!

This is so unique

thank you for the great review

@ArjanCodes

Жыл бұрын

Thank you Sean, glad you liked the video!

Loved this..

@ArjanCodes

2 жыл бұрын

Thank you so much!

Wow , this is something different , there are tons tutorials but you are good ! keep doing . Looking for descriptors and design patterns lecutres, any idea ?

thank you !

Great video and talk. Thank you! Want more =)

@ArjanCodes

3 жыл бұрын

Thanks! The next part will be released tomorrow :).

Great content!

@ArjanCodes

3 жыл бұрын

Thanks so much Serge!

Great Lessons!

@ArjanCodes

9 ай бұрын

Glad it was helpful :)

@harish.bhuvanachandar

9 ай бұрын

@@ArjanCodes Great to see a reply from you. I have two questions, Arjan. 1. You used class variables. And you used instance variable as well. Why are you using both? Instance variables aren't enough? When to use which? Could you please help me in understanding that. 2. While writing functions inside class, when to pass variables to functions and when to use instance variables directly (self.xyz)? Which is best way of writing functions that helps in testing as well.

Great video! just a minor vocabulary pointer (business people have committed far worse sins): if you can't actually measure it, it's not a metric by definition. Cohesion and Coupling are heuristics. It's an esoteric word I'm trying to bring back!

Amazing content!

@ArjanCodes

3 жыл бұрын

Thank you so much Carol!