Write Python Code Properly!

[@bassam.2023]

For such a versatile, and useful language, many of Python's conventions are absolutely assinine.

[@sylvainprive1754]

😱😱😱 how dare you ! (Joking)

[@micahwright1578]

100% agree. Hinders' readability significantly. Idk why go hard at is None vs == None to kill programmer's efficiency with petty semantics

[@huantian]

Random things: order of imports is recommended to be future imports, builtin packages, 3rd party modules, project specific imports, each separated with a newline. When you have a keyword argument with a typehint, you add the extra spaces: def foo(str: arugment = “hi”):

[@ex0stasis72]

I love the way that snake case looks in PEP-8. At first I was not excited about having to reach my fingers to do the awkward _ characters, but really, I only need to type those when I first declare the variable. Every other time I use that variable, I can just use my editor's autocomplete and just skip all the underscore characters and then just hit tab to accept the autocomplete.

[@Landon_Hughes]

I swear every time I look something up, you release a new video on the subject lol Thanks!

[@ncmathsadist]

If you use if foo[3:] == "bar" and you subsequently change "bar" to "barf", your code is broken unless you also edit the slice size. This is brittle. That's why Guido recommends endswith and startswith.

[@ankitaburman5406]

You are right now my most favourite person on this planet...❤️ Thanks a ton for all the learning videos

[@sumitpatidar3143]

Unconsciously I follow all pep8 style guide you have discussed in this video 😄

[@danub5551]

same lmao i thought i was the only one

[@satyampatel3713]

ah yes pycharm does annoy with those squiggly lines

[@Cpt_Diabetes]

Hi Tim, i'm very new to tech and a career changer, i just want to say that the content here is one of the best explanations i've found scouring the interwebs!

[@tadiwashangwa4931]

I was actually researching on this thank you Tim

[@BartWillems1969]

Irony: in an article title "write proper python code" using "from os import path" as an example when Pathlib is by far the preferred solution for handling file paths

[@yourdadsbestfriend7101]

glad im not the only one who thought about that

[@evanhagen7084]

Is pathlib built in?

[@pierre-manchon]

@@evanhagen7084 yes

[@BartWillems1969]

@@evanhagen7084 it’s in the standard library, just like `os` - no pip install required.

[@nguyenanhquan4431]

You missed the point. He was just giving an example that if you import multiple things from the same module then you should put them on the same line according to PEP8.

[@zulucharlie5244]

Excellent, to-the-point summary of PEP8 convention. Thank you.

[@SajidAli-wy1zs]

your channel is best. From bangladesh.

[@Markyroson]

Camel case: aka how you spot people who started in other programming languages and have a hard time breaking the habit in Python 😂

[@sucman1684]

actually, i started in python and started with camelcase because that’s how i used to write my usernames in games.

[@เมทินีคํามี-ข8ป]

Glyyy Yvvbg G Yep

[@Jay_0605]

Me because I started with java and javascript

[@FADHsquared]

This is why you need a linter

[@Iuigi_t]

Camel case: How to future-proof your code, when you learn another programming language

[@Rachinter]

This video should have millions of views 💯❤️🔥

[@tahirahmed96]

Tim I'm beginner at python and overall new to programming your videos are helping me a lot. I'm really interested in data analysis can you please make some videos on this topic

[@akira_asahi]

Thank you for the video. I am grateful for your time and contribution. Kind regards, Akira.

[@Queso791]

Thank god, a list of my fav youtuber 😎👌, keep up Tim.

[@mohbkhaled6051]

The autoformat feature on save is just a life saver my code instantly looked X10 better by just saving the file

[@lhcunha1]

great tips on black formatting on vscode!!!

[@bartugonulalan]

when he says "is not not not is " my 5 years old brain: **giggles**

[@FADHsquared]

It is what it is

[@typeterson8376]

Unexpected banger. As the expression (roughly) goes: "any fool can write code that a computer can understand, the challenge is to write code that a human can understand"

[@therzook]

Yep, defo show it in work tomorrow... our team's coding is like NY subway wall, snake here, camel there, pascal on top and indentation may vary a lot.... Not to mention those long strings punching through the sides of 2 screens...

[@zachfenton608]

this is awesome and explained well why these rules are used

[@goodmanshawnhuang]

thanks a lot Tim for sharing this, I nearly broke all the rules😅, will apply to my next project though.

[@roydadancegod]

Also could you cover what to do for parameter and return type and the spacing for it? For example def function(a:int, b:list) -> list

[@peschebichsu]

Amazing video, was wishing for a while you talk about it! One thing about the comments (ca. 21:55): Is there a convention, when the comment should be on the same line as the code and when it should be on a new line above it?

[@paulzupan3732]

There's no real convention for it, you basically just have to use your own discretion. One way that I decide which one to do is that if I'm trying to write a comment about a block of code, I put the comment above the block of code, but if there's something I want to say about a specific line of code, then I just put it on the same line.

[@georgeseese]

Thanks for your expertise. At 22:35 it appears that you're saying if x = False or if x = 0, "if x:" will trigger. Isn't it the opposite? The shorthand "if x:" refers to True or something > 0, depending on the object reference.

[@markoburak6549]

that's right, it should be if not x:

[@codingcrashkurse6429]

Won´t get as many views as normally, but this is such an important topic!. I always get crazy when I see people coding x == None or even worse: try: x() except: pass

[@Chemasaurus]

Wait, what's wrong with if x == None:

[@mmbaguette1520]

@@Chemasaurus It's faster to do *if (type(x) is int)* for example.

[@Chemasaurus]

@@mmbaguette1520 But is there anything wrong with if x == None? Is it any different than if x is None?

[@Joe-zg9eq]

whats wrong with try: [CODE] except: pass I use that a lot

[@inakiarias7465]

@@Joe-zg9eq If you are trying something and it fails, you should handle the errors, ideally. At least you would log or state what's the error that happened. But passing after failing in a try block is considered very bad because of that.

[@emaddeve20]

Wow this is vedio is so useful. Thank You Tim

[@sergiomendoza6833]

Great vid! Tim!

[@melissaleigh3013]

Amazing and Tim you are glowing

[@Schnieker]

What about numbers? Can i name my variable test_1 or should i name it test_one?

[@therabidpancake1]

Just some random information I find that when I use double quotes that it allows me to use words like in or is . For example print("spike is a good dog ") . Indentation in python doesn't make a lot of sense to me . I know everything after the colon is indented but what I am talking about is why . I tried to have a buddy of mine explain it to me but it is still clear as mud . He says that it executes each line of code in order of the indentation . While that may be true it does not make a tone of sense . So what does the computer recognize def blank(): it would throw an error if I didn't write pass .

[@Richard_GIS]

I do programming in python on a daily basis and i really do not follow most of the pep Guidelines as python itself is not really following their own standards too. The best tip you also mention is, consistency. I do camelcase for normal var, for class and function i follow the pep with the underscore.

[@pietheijn-vo1gt]

What do you mean python is not following their own standards? Maybe you can deviate from PEP if you work on projects by yourself, but if you work in a team you really all have to follow the same styleguide otherwise the codebase becomes a mess. So why not follow PEP. Most IDE's can automatically check for it as well.

[@Richard_GIS]

@@pietheijn-vo1gt no you missed the point, I do follow the pep, as in some cases it could cause follow up issues if you do not. But considering Naming vars and defs it is not that important but consistency through out the script. When you write camel case var instead of underscore, no Big deal. In bigger projects you do follow the standard AND what the team deside, if there is a preference to write vars like this and that. I am really only referring to naming, nothing more ore less. If a programmer cannot read that, he /she is maybe not a programmer. The key word is consistency. Regarding there own standards, when you read the peps its sometimes a mess what is proposed and what not, what is adopted what not, sometimes it changes..i found it quit hard to read. I read one pep where python itself was not consitent - but sorry i cant remember what was it exactly.

[@pietheijn-vo1gt]

@@Richard_GIS I missed the point? You literally said "i really do not follow most of the pep Guidelines". Maybe you missed the point? I think every team should follow PEP and only deviate if there is a very good reason to do so, everybody agrees and the code linters validate the deviation too. I have contributed to a few open source projects and they tend to use linters that simply reject your commits if it doesn't pass PEP. I haven't found anything inconsistent in PEP so I wouldnt know what you are talking about. But on the other hand PEP is very comprehensive and humans can make mistakes so it wouldn't be weird if there were a few inconsistencies. If you spot them, just report it.

[@Lunolux]

nice i try to use more often convention name when i'm programming now, not very easy

[@inselmanu]

Danke Tim und Grüße aus Deutschland

[@DefWorlds]

It would be great to see some best practices re how best to break long lines and line up chains of method calls.

[@umeshlab987]

This is useful for timathon

[@TheFootballPlaya]

i didn't know about the startswith thing either, good to know. i've seen it around used a lot. question though, for function names that are multiple words, do these act similarly to variable names as in they are snake case as well, or is there some other way of denoting functions as opposed to variables? also, do we treat lambda functions any differently in this regard if they are stored in a variable?

[@AI-tg2by]

Love your vids! Could you do any about when you would use classes because I do get confused slightly.. maybe through doing a project - that would be ace!

[@Dante-nu5cn]

Yes please! Great idea, I was just thinking about that!

[@AfshinDavoudy]

Black formatter changes "x = x*2 + 1" to "x = x * 2 + 1". So, it is not based on PEP8. am I right?

[@ismahelo]

What theme and font do you use for VS Code? By the way, very useful tutorial!

[@aduomas5972]

Following.

[@luul4683]

.

[@kekkaigenkei]

Theme: Monokai Font: I think it's the default Consolas The theme enables the font italicizing on function / class declaration

[@terrisquire1940]

Thanks for this!

[@captain_trips994]

awesome video. thank you

[@omar72999]

Hey man, this is random but what chair is that? I have the exact same desk as yours (the table top and Alex from IKEA) and have been struggling to find a chair that fits them for a while now. Is your chair comfortable? if so do you mind giving me a link so I can get a similar one?

[@TechWithTim]

It’s a great chair, absolutely love it. It’s called a Herman Miller Aeron chair, I have the classic version but they now have an updated one with ever more features. I also have a head rest which I bought separately

[@omar72999]

@@TechWithTim alright thanks a lot man!

[@Nordlys0]

The new updated chair's head rest can be moved by a 4spaces/tab distance each time to fit the correct indentation of the head rest angle.. hehhe

[@andregarvin5529]

If x is false then the if statement will not trigger. only if the value is True or True equivalent

[@richardcasey4439]

This is so important for readability

[@muhammadanique2256]

Hey Tim ! Please do a react and Django project , please 🥺

[@rubaokiller]

what about if __name__ == "__main__": using double equal signs ?

[@alagappank1242]

Tim , some Tutorial for Data Science please....

[@Noone-lw6ge]

You should be using spaces for indentation. Me who just uses the default auto-indent from sublime

[@kinghenry238]

Whats wrong wirh the open exceptions in try?... Its kind of nice to catch exceptions that you dont know about sometimes.

[@adithmanu3715]

You can use Ctrl + J to hide the terminal

[@SavorkoTime]

Thank you, after this video almost all bugs on my project were closed! And they fire me, coz they dont need python dev anymore...

[@bijeshmohan]

How should I order my imports?

[@fastrockstar1705]

Imports should be grouped in the following order: 1. Standard library imports. 2. Related third party imports. 3. Local application/library specific imports.

[@bijeshmohan]

@@fastrockstar1705 should I order each section alphabetically?

[@fastrockstar1705]

@@bijeshmohan That's up to your liking.

[@omerfi]

I think you should make a playlist about clean code and add this video to the playlist

[@wongkingshun]

I think it is much more easier for viewers to follow a 25 to 30 mins videos long video rather than a 6 videos long video. And subdivide them into different small topics

[@baptistearnould2313]

What text color is he using on VCStudio ?

[@orangecoat3848]

Monokai, very popular

[@ThEBengaliFriEnDz]

can anyone tell me wich theme tim uses in vs code?

[@virgile8957]

the name for the all-caps snake case is screaming snake case.

[@Klannahar]

What about class variables? Same as normal variables? Is this style used in any language? "myVariableName"

[@sherluck_code]

The class variables should still be the same as the normal variables, in this case snake case, but if you mean the class name the class name should be a pascal case like class ClassName

[@Klannahar]

@@sherluck_code I ment like self.my_variable, and the question part is just in general. Idk i remember somewhere i saw that type, but not sure it was just a user preference or it was specific to other programing language.

[@orangecoat3848]

Interviewer: "Why were you fired from your previous job?" Me: "Something i did at work" Interviewer: "Which was ?" Me: "Indent camel case with tabs in python in lines with more than 80 lines" Interviewer: "Next please"

[@nickvledder]

How about: pip install pycodestyle?

[@Louis16261]

The PEP8 maximum line length is 79 chars, not 80.

[@AngelicaGoodwin-d4e]

cool video)

[@santoshkumargouda6033]

From where i get the code?

[@luul4683]

which font is it?

[@dimitriosdesmos4699]

thanks very nice

[@tablenkov4993]

Thanks.

[@greg_pizzatower]

code is code

[@sgt391]

When I break code conventions I know I'm writing shitty buggy code that I'm going to rewrite in the future

[@kristjanbradac8931]

Can someone tell me what colorsheme is this, pls? It's like in sublime text3. :D

[@meloman7094]

Thank you very much for the Russian subtitles!)

[@adrielbradley6677]

I always use single quotes for single words 'hello' and then double quotes for longer strings.

[@sciencedoneright]

It saves time

[@harrypotter6894]

mans holding onto that hair for dear life. time for a shave bro!!

[@guitaek4100]

Actually watched the video twice. Especially the spacing was very helpful 👍 however, as far as I know, classes without a parent are going to be the old-style-classes

No, in Python 3 there are not any old-style classes.

[@eyal4]

pleas more open cv :)

[@Raja-tt4ll]

Nice

[@stivunnikolov5941]

Is someone really pressing 4 spaces instead of tab?

[@lemmyboy4107]

Just make a makro that 1 tab = 4 spaces xd.

[@stivunnikolov5941]

@@lemmyboy4107 you are very smart boy.... I hope smart enough to feel the irony...

[@lemmyboy4107]

@@stivunnikolov5941 i mean i can send that back. Most ides would brake without a dedicated tab.

[@Kay-qg1vn]

That's why i use pycharm 😌

[@goranbrannstrom]

Great video! But some PEP obsessions are really stupid. Like restricting oneself to 80 characters per line.... Why?

[@reda29100]

17:17 I'm sorry for the mayhem I'm gonna stir, but my woke professor says white spaces are always problematic.

[@soulninjadev]

@Hethat take notes :mhm:

[@herojedrus2567]

you did not tell what to do when `from module import thing1, thing2, thing3, thing4, ...` is too long :(

[@0x007A]

The most annoying Python code, regardless of its potential usefulness, is poorly (or completely abscent) commented source code.

[@ΑνώνυμοςΧρήστης-ρ9ζ]

Self-explanatory code does not require comments

[@ed-xs3pu]

@@ΑνώνυμοςΧρήστης-ρ9ζ required... No. But comments on WHY the code is there is quite useful. And comments are much easier for your brain to parse.

[@sscapture]

@@ΑνώνυμοςΧρήστης-ρ9ζ It does

[@JorgeLuis-ts6qp]

One of the things I hate the most from Python y how much you must trust the developers. It's incredible there is no way of making a variable constantant!!

[@ed-xs3pu]

I'm new to python and coding. Is there value to having it defined as a constant vs. just capitalizing it. If it's capitalized then you should know not to change its value right? Or is there something else to it?

[@christianemden7637]

The rules on the use of white spaces seems to be rather inconsistent.

[@ayushganguli1359]

I am still a noob but in my limited experience its best not to use black in case of a collaborative project with git. Goodluck merging commits on using black. Auto format makes your life hell on merge

[@pietheijn-vo1gt]

Guido is pronounced Gi-do not Gwi-do

[@RoyalTutorial]

Anyone here uses Pydev with Eclipse? Should I make the move to Visual Studio?

[@tooru]

bruh

[@demerion]

Can we name a variable "var1"? Or would snake_case be "var_1" in this case? What is the convention when using numbers?

[@chilly111]

I would use more descriptive names and if I needed variables of the same name indexed I would prob store them as a list instead: vars = ['x', 'y', 'z'] and access them like print(vars[2])

[@omanavarghess6847]

If you want to break the rules, break them consistently.

[@codingboy2254]

Is this guy reading minds, I was literally watching a seminar by uncle Bob on writing clean code , and he posts this video . CREEPY!!!!!!!!!!!!!!!!!!!!!!!!

[@alexneigh7089]

It is called SCREEMING_SNAKE.

[@albertojlorenzorosario2759]

camelCaseIsKing change my mind

[@eylonemuskson4177]

_Once you go Black, do you don't...ever, have to worry about messy Python code again...._ I'm a poet.

[@ivernik]

Thank god for pycharm. 😅

[@bratpeki]

so you just showed off syntax preferences instead of actually common coding mistakes and hos to correct them?

[@developertools95]

make some project on python

[@YazhShah]

Always add an empty line at the end of your file.