11 Tips And Tricks To Write Better Python Code

[@patloeber]

I hope you find these tips helpful! Let me know if you have any other Python tips that improve your code :)

[@uploadvoice]

Helpful but too many ads cut...

[@kingkhann9]

Can you iterate from say idx 2 to n-4 of a list using enumerate without slicing or any extra lines of code...

[@abhisheksanwal1106]

@@sudhanshuranjan9 ya membership test is faster in set

[@Princess0Reem]

remarkable!

[@jorgemercadog]

Thank you!! Cheers from Chile!

[@IlyaLisovfan]

In Python 3.9.0 or greater we can merge dictionaries using `|`: d1 = {"name": "Alex", "age": 25} d2 = {"name": "Alex", "city": "New York"} merged_dict = d1 | d2

[@drygordspellweaver8761]

I like this as it stays true to Pipe symbol

[@billw8dsx939]

you rock

[@DailyDoseOfCCP]

And print(merged_dict == d1 | d2) will print out true

[@flames9310]

This syntax is way simpler.

[@albo5194]

Is there an easy (and fast for large dictionaries) way to merge dictionaries in a way, that it includes every value of both dicts with the same key? for example, if d2 would include "name": "Luca" instead of "Alex", i would like the merged output to be like: {"name": ["Alex", "Luca"], "age": 25, "city": "New York"}

[@FailedSquare]

0:20 Iterate with Enumerate x For Loops with If 1:02 List Comprehension x For Loops 1:51 Sort iterables with sorted() 3:00 Unique values with Sets 3:37 Generators replacement for Lists 4:58 default values for dictionary keys 6:06 Count objects with collections.Counter 7:39 f-Strings > str.format() 8:20 Build up strings with .join() 9:27 merge dictionaries - This feature is updated again in 3.9 using | 10:00 simplify if statements

[@patloeber]

Thanks for the summary :)

[@yt-sh]

@@patloeber you made this in 11 min, I see what u did there

[@DavidTangye]

@@patloeber This is a very nice video for quick reference on these coding best practices. Can you please copy this list of times to the video Description for future reference. That makes the vid hugely helpful for in future.

[@Daniel-um9ye]

Superb content. I am a C++ programmer, but since 2019 have been dabbling with python. Being pythonic is actually what I look for as of now. Thanks.

[@evanhagen7084]

On the last tip it would be much faster to use a set instead of a list. Sets have constant lookup time but lists have O(n) lookup time.

[@sshishov]

To convert list into set you need to execute O(n) operation.

[@evanhagen7084]

@@sshishov my point is you shouldn't even create a list in the first place. You should create a set to begin with

[@sshishov]

Agree, but sometimes lists are needed if you want to keep duplicates or you want to keep items in inserted order.

[@andraspongracz5996]

@@sshishov True, but if you want to check membership, say, n times, than its O(n) vs. O(n**2). It depends on the problem which data structure is better, as your second comment shows. But if you are only worried about runtime, then @Evan Hagen is correct: you basically cannot lose by using a set (I mean even if you have to convert first), because if you run it once, it is the same runtime, but if you do it many times, then set is the better choice.

[@sshishov]

@@andraspongracz5996 agree 👍

[@etgaming6063]

If you aren't speeding up your videos during your scripting then you are a REALLY FAST typer, like holy crap. IDK how you can type those lists in under a second, that is crazy to me.

[@jth5726]

dude, I've been doing a programming course 12 weeks, I feel like f-strings are something we should have been taught immediately, why am I only learning it through you

[@eminm6383]

I almost don't know any python, but I was able to comprehend 80% of the content. Amazing simple explanation. Thanks.

[@manuelmanolo7099]

I thought this would be something that would go way over my head but, as some that recently started learning python, this was really valuable!

[@jordangl1]

Your videos are by far the most concise and easiest to assimilate compared to every other YT Python teacher (to me). Thanks for taking the time. Good stuff

[@schedarr]

That is absolutely golden video. Extremaly useful tricks that will make your life way much easier. I've already used 10 out of 11 but still it's nice refresher.

[@patloeber]

Great to hear!

[@stevenwilson5556]

The Squares example.. here's Python code: squares = [i*i for i in range(15)] print(squares) Here's the R code: x = 1:14; x^2 Python 48 characters, 2 lines R 13 characters, 1 line Advantage: R.

[@stevenwilson5556]

at 4:15 using generators: Python: my_gen = (i for i in range(10000)) print(sum(my_gen)) R: x = 1:1e4; sum(x) Python 52 R 17 Advantage: R.

[@saurabhjain507]

I love how you explain with simplicity. Great content.

[@patloeber]

Thank you! Glad you like it!

[@Arson_Oakwood]

I'm amazed at how there are beginner programmers, who never read basic tutorial in official documentation, and then watch similar videos, thinking they are learning advanced concepts.

[@RicardoAmaralAndrade]

Simply wonderful! Subscribed in the first 2 minutes! Python is the greatest modern language, and these tips are gold!

[@patloeber]

Thank you so much!

[@YouAreNotFree1]

First example: return [max(i, 0) for i in data]

[@vitalimueller6209]

Nr.3 you can also do: from operator import itemgetter sorted_data = sorted(data, key=itemgetter('age'))

[@patloeber]

Yes thanks for the tip :)

[@Mdroudian]

i like this

[@plumberski8854]

Clear tips, like how you explain them, are simple and clear!

[@davidvanleeuwen3274]

Thanks a lot! The first minute already helps a lot.

[@nebular-nerd]

Some interesting tips, I'm just going through a reformat of a new script and this should help tidy and speed some operations.

[@ekkyarmandi]

Nice tips. It speedup my code writing. Thanks, man.

[@gauravrajput8109]

I am so glad I found this channel.

[@TheSuperUser]

Great video. Please make more of these quick tips for comparisons of "beginner" python code vs experienced developer idioms

[@patloeber]

Thanks :)

[@wintur2856]

Thanks for these tips! It's hard finding content outside beginner courses.

[@PaulTheEldritchCat]

Nice tips, I'll save the video for later. Thanks!

[@Kinos141]

Finally, how to do strings properly. I love using something like that in c#, and I'm glad it's on other languages like python.

[@mei2654]

2:59 you can preserve order with the help of sorted function example: my_list = [1, 2, 2, 3, 4, 5, 6, 7, 7 , 9, 8] sorted(set(my_list), key= lambda x: my_list.index(x)) >>> [1, 2, 3, 4, 5, 6, 7, 9, 8]

[@0LoneTech]

Fun fact: Dictionaries are now order preserving, so you can do the old trick of using a dict as a set and keep order without sorting. E.g. {k:None for k in [5,2,3,2,6,5,1]}.keys()

[@thebuggser2752]

Great collection of useful tips, presented very clearly and concisely. Thanks!!

[@rushi7312]

I'm a beginner -ish and knew about half to 2/3rd, but also learned a few good tricks :) Thanks

[@akshitstenaa]

I am your fan now , thx a ton mate for all these tips.

[@patloeber]

Awesome, thank you!

[@akshitstenaa]

Please try adding videos on Scarpping, ML & analytics . 🙂

[@srimanthmahadev8272]

An alternative of TIP 10: if you have two dictionaries you can join them using | operator. d1={'one' : 1, 'two':2} d2={'three':3} d3=d1|d2 print(d3) output: {'one': 1, 'two': 2, 'three': 3}

[@patloeber]

yep great tip!

[@vishnuuvardhanreddy3010]

Bro i am new to python I am very much interested to learn python please give me suggestion to develop my python basics to reach up to a professional level

[@notbme2731]

@@vishnuuvardhanreddy3010 KZbin and reddit are your best friends to learn anything

[@ИванИваныч-н3у]

Not worked on all versions of python, just new.

[@ИванИваныч-н3у]

What about dict update method?

[@marcelomelo6349]

My tips: 1.Use map instead of for 2.Don't forget the walrus operator, just a details. 3.Don't use func(list[0], list[1]) use func(*list) 4.The tip 3 is also good for creating iterables in certain cases, [*list] for example 5.Don't iterate if you want new items for the list, use list.extend()

[@marcelomelo6349]

What do you think? Do you have more?

[@akira_asahi]

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

[@alankritverma1839]

one of the best python videos. Really useful

[@DisSsha]

Hello, Thanks for those great tips !! Does someone knows which IDE he is using ?

[@goldendovah7613]

Looks like visual studio code.

[@faithinverity8523]

Superb [ ] of tips. Thank you!

[@davidtalturejman9185]

Thanks man! Nice video!!

[@rutanshudesai]

amazing tips, very very valuable. thank you for sharing.

[@abdallahsalim4759]

Thanks man, this was helpful

[@MasterEhsan369]

THANKS that was useful...

[@fahnub]

bro this was super helpful. thanks for this.

[@shababe2243]

Excellent information,Thanks

[@leesweets4110]

Generators and dictionary merger were new to me and I can see being very useful. Are generators more costly in terms of time efficiency? Seems to me that calling it multiple times is less efficient than having a precomputed list.

[@gudguy1a]

Still very relevant content, thanks for having this.

[@GaelGendre]

Dude this is great, thanks!

[@patloeber]

happy to hear this :)

[@datastako156]

very helpful. thank you!

[@Kinos141]

I noticed that merge dictionaries doesn't merge into a new line, but more over writes the old on. I changed the name in the d2, and it overwrote the name in d1. I thought it would just create a new name in the dict. Is this the intended behavior?

[@ИванИваныч-н3у]

Yes, the keys must be unique, otherwise it will be replaced.

[@zacky7862]

Could you please tell how to safely count or check the if the generators items are empty?

[@Zephyr-tg9hu]

Awesome tips, thank you!

[@patloeber]

Glad it's helpful!

[@latt.qcd9221]

The idea of list comprehensions was new to me, but I was curious if there was an option for dictionary comprehensions and, sure enough, there is! Was able to clean up a lot of my dictionary for loops. Thanks!

[@mostafasadeqq]

what a legend , ty very much man

[@changwei-zhe9406]

thanks for the useful sharing!!!

[@patloeber]

glad you like it!

[@jomelsanpedro7271]

thank you so much. keep it up you're the best.

[@patloeber]

thank you!

[@javohirorziqulov9644]

only one word: amazing...

[@patloeber]

thanks!

[@akashgillella]

Wonderful tips. Every single one is pretty useful.

[@gomathikreddy350]

Great content. Thank you for sharing ur knowledge. It'll help if the font sizes are larger for screen casts. I watch ur videos on an old android phone. 😐

[@patloeber]

thank you for the feedback! I try to improve this on my newer videos

[@gomathikreddy350]

Thank you. 😊🙏

[@zacky7862]

This is great. I'm always looking on better coding style. Could you tell which vs code theme that you are using? Thanks

[@patloeber]

Yes, I think it's the Night Owl theme

[@mmxo2631]

literally watched for 1:03 seconds and i love the video. I'm a beginner btw. SUBBED!

[@octobotdev]

Thanks for the tips, always great to listen to fellow Python devs!

[@victorsuarez4333]

Thank you, this video was very helpful!

[@HiteshKumar-178]

Really admire your work! Nice work mate

[@patloeber]

Thank you!

[@alyssonmachado1254]

Valuable tips! Thank you very much!

[@sc0urge561]

One question though, are generators also faster than lists?

[@patloeber]

no, the important point is that it requires less memory

[@NavinKumar-tv9hg]

Wonderful. Thank you!

[@enzopestana]

really helpful, thanks a lot

[@manuelpardall8688]

Very useful tips and tricks! Thank You

[@patloeber]

glad it's helpful :)

[@knowledgedaily1173]

This is one of the best python related videos I have seen.

[@patloeber]

thanks a lot!

[@tincustefanlucian7495]

Generators tip was quite a nice trick to know! So easy to be confounded with list generator.

[@patloeber]

yep it's very handy sometimes :)

[@onurkoc6869]

You are Superman:) Thanks for all of sharing.

[@abdulqadar9580]

Please make complete playlist like these tips of python

[@chuzhong1214]

Is the enumerate function really that much better? Having trouble finding convincing arguments other than “it’s more pythonic”. Performance also seems to be better using range/len … presumably because you don’t have to generate a whole list of indices first but rather just fetch the size of the array itself.

[@0LoneTech]

enumerate creates (and usually unpacks) a tuple for each item, so it is quite plausible to have it operate slightly slower than a range iterator. range hasn't built the full list since Python 2 (back then the current range was known as xrange). You can also enumerate any iterable, not just sequences of known length. Mostly the difference does come down to clarity, and that's a pretty compelling argument IMHO. How long would it take you to recognize zip(itertools.count(), iterable) as the same function?

[@petelogiudice8202]

Very helpful in refactoring my brain to be more pythonic!

[@MrGustavCR]

Another great video. Thanks for the amazing content.

[@patloeber]

Glad you like it :)

[@maxfondle6793]

Thank you. Mind actually blown.

[@bashvim]

What keyboard shortcut are you using run the python file in the Output tab below?

[@paulosergioschlogl9550]

The {**d1, **d2} can be used with collections defaultdicts?

[@jorgeluismongeblanco6933]

For #1, I would prefer a list comprehension: data = [0 if e < 0 else e for e in data]

[@albertog2196]

Best python channel in YT

[@patloeber]

Thank you :)

[@krupaneshkrishnan9284]

Great video, Thanks.

[@eranzaksh]

Thank you! Isn't enumerate slower then range(len())?

[@azsxcvbnhjks]

the first tips give error if you try it. 'int' object does not support item assignment

[@manojm9084]

This is a very good video. Thank you very much , keep up the good work .

[@Mangohawk124]

What idle do you use i.e what is used in the vedio ??

[@travelchimps6637]

Great content and background music

[@sig7813]

Very cool. Learn from you a lot

[@patloeber]

Glad to help

[@TejasBangera]

Thank you, Subscribed to the channel

[@patloeber]

Thanks!

[@saitejam3769]

Sir please post videos on nested loops and tips in nested loops

[@castlecodersltd]

Very useful, thanks ☺

[@MarioVegaTOAO]

Most excellent video!

[@mohamedmzoughi8234]

Very informative great job

[@chakkarapaniv]

Hey, Excellent videos. The style is amazing! and more informative!. I am following you.

[@patloeber]

Great, thank you!

[@emilioschmidt2106]

Why does the .join method not accept generators? Wouldn't that be a perfect use case as you only need the values of the list one at a time

[@patloeber]

yeah it's only implemented for strings, but you could implement your own join method for generators

[@mywebuniversity]

Excellent video, very precise and nicely done!

[@pavin3949]

What is the compiler r u using ?

[@ssshukla26]

Merge dictionaries.... Woahhhhh.... Oh my God... Thank you so much... That will make my life a bit easier....

[@prashanthreddy1924]

you made me a better programmer with this video. Please do more series of videos like this.

[@patloeber]

glad to hear this!

Hey dude. Thanks for this video, it helped me a lot in my studies! What's the theme you're using? I found it really cool and couldn't find it on the marketplace

[@patloeber]

It's the night owl theme. Have a look at my tutorial about my VS Code setup :)

[@shashishekhar----]

very informative video brother 👍

[@PhuongVu-jv9eg]

Thank you very much! Keep up with the good work!

[@patloeber]

Thanks, will do!

[@namanthacker]

Very nice and useful tips