Here are my top 5 most useful f-string formatting tricks that I use everyday in Python. ▶ Valentine's Day SALE on indently.io: www.indently.io ▶ Follow me on Instagram: / indentlyreels
Пікірлер: 295
@chyldstudios2 ай бұрын
the "=" trick in the f-string is fire.
@m-zurowski2 ай бұрын
It made my day - I'm gonna test run it in a loop with some random dictionary to see how many cool tricks it can do (like reading current settings) :)
@m-zurowski2 ай бұрын
ok, my idea didn't work as expected 😅
@sunwukong62682 ай бұрын
Ever since I learned f-strings...I love them.
@GentleMannOfHats2 ай бұрын
I wish I had known sooner!!
@rickymort1352 ай бұрын
And I love you.... Sorry if I made things awkward... 😬 Oof this awkward isn't it?
@andymitchell21462 ай бұрын
I've been using python for about 10 years, and f strings extensively, but never knew that last tip! Game changer!
@yash11522 ай бұрын
well, thats cause its only a very recent one (afaik)
@eyehear10Ай бұрын
@@yash1152it was introduced in 3.8, so a while back
@_Loki__Odinson_2 ай бұрын
This is the first time I have seen someone specify datatype for variables in python, and I honestly loved it. Great tips btw.
@Indently2 ай бұрын
That's the hype for type annotations that I love to see!
@Naej72 ай бұрын
Not using type annotations should be banned by law
@_Loki__Odinson_2 ай бұрын
@Naej7 I don't think so, many people choose Python for its simplicity, with the absence of type annotations being one of the key factors. Removing this feature might deter beginners from trying it out. However, as you become more proficient in programming, you may choose to utilize type annotations or when exploring other languages.
@Naej72 ай бұрын
@@_Loki__Odinson_ Type Annotations help a lot, and if adding 5 characters (: int) is too hard at the beginning, then one should give up on programming lmao
@edwardcullen17392 ай бұрын
@@Naej7 Except people don't understand how to use them, so you end up with unnecessarily hard to use APIs. If that's how you feel, why not just use C? 🤦♂️
@Zenivo2 ай бұрын
About the fourth trick: the f in ".2f" tells it to format as float. You can also do for example ".2e"" which will format the number in scientific format.
@utarasama2 ай бұрын
The last one is super duper cool!
@dcx452 ай бұрын
RIP the maintainer
@utarasama2 ай бұрын
@@dcx45 he should then watch this video
@krzysiekkrzysiek90592 ай бұрын
This kind of tips are awesone. We need more 👍
@TheMcSebi2 ай бұрын
Great video! Didn't know about the datetime and debug print ones. Definitely going to use them in the future, though.
@bashar92002 ай бұрын
This is amazing!! thank you for this tutorial!!
@flashtrack1012 ай бұрын
Love your vids man! would love to see a tutorial on cython from you!
@SergioYT20522 ай бұрын
"Simple y bello como un anillo", como diría Neruda; pero además, muy funcional. ¡Muchas gracias!
@jaa928Ай бұрын
Thank you for the instructive tips!
@timegor8442 ай бұрын
Wow, so many simple things I didn't about... Thank you
@TheJaguar19832 ай бұрын
Didn't know about the date/time and equals formatting. Looks like the first one forwards to strftime. Makes things so much more concise and readable.
@dipeshsamrawat79572 ай бұрын
Nice collection! 💯
@richsadowsky85802 ай бұрын
Absolutely fantastic and useful video!
@quekki36662 ай бұрын
i love f strings also this is like the 3rd time i come across the = specifier but i keep forgetting its existence and type in the whole thing
@Indently2 ай бұрын
It's a cool trick for sure!
@TheKahunas27220002 ай бұрын
Love the video I knew some of those but the last one is epic I will be using that from now on .
@rolandsz88312 ай бұрын
Great video! I missed the bonus tip where you explain that format string calls __format__ on the object being formatted, so you can do your own formatting, like this: class MyData: def __init__(self, a: int, b: int, c: int): self.a = a self.b = b self.c = c def __format__(self, spec): if spec[0] not in self.__dict__: sep = spec[0] l = list(spec[1:]) else: sep = ',' l = list(spec) return sep.join(str(self.__dict__[key]) for key in l) my_var = MyData(a=1, b=2, c=3) assert f"{my_var:cba}" == "3,2,1" assert f"{my_var:-abc}" == "1-2-3"
@LittleGnawer2 ай бұрын
Nice and useful tricks for every day programming. I also prefer specifying types of variables, since it makes code better understandable.
@mattshu2 ай бұрын
F strings are soo chef kiss
@kychemclass58502 ай бұрын
Love #5. Thank you.
@mjhaynavarroАй бұрын
So cool.. thanks for sharing it. very informative
@Pawlo3702 ай бұрын
Finaly! All fstring variations in one film
@MahdiImeni2 ай бұрын
Loved it ❤
@viniciomonge3960Ай бұрын
Loved the last trick!!!
@rahulCoding2 ай бұрын
Great video.... Thanks a lot😍👍
@UndyingEDM20 күн бұрын
For those who didn't know, the last one is called self-documenting expression and was released in Python 3.8
@Krullfath2 ай бұрын
This is super cool, I sadly can't think of any usecases in my current project
@Angelinajolieshorts2 ай бұрын
Great work sir❤
@Anzeljaeg2 ай бұрын
This is pure gold 🥇
@kinngrimm2 ай бұрын
thanks for the showcases
@catastrophicblues132 ай бұрын
That last one is sooo useful!
@Al_Miqdad_2 ай бұрын
thanks for your time please make videos about data structure
@dark-ghost41322 ай бұрын
Thank for nice tricks 😘
@karthikkarthik1002 ай бұрын
Last trick was super cool...
@ChrisHalden0072 ай бұрын
Great video. Thanks
@mrjamesflores2 ай бұрын
The last one was good!
@cmcdougle2 ай бұрын
Thank you, this went STRAIGHT into my current project. Commas in numbers was one of the next things I was going to look up.
@daveys2 ай бұрын
I like that print(f’{a + b = }’) one at the end. I can think of a few times when I’d use that.
@Indently2 ай бұрын
Earlier I didn't know it worked on whole expressions, I think it's super cool as well!
@griffgruff12 ай бұрын
Great video!
@SaveCount-bh8tp2 ай бұрын
Thanks very much
@semenivanoff861523 күн бұрын
Useful. Thanks
@yash11522 ай бұрын
i knew last one already, but seeing it again made me realise i should try to do this in java too, would have shortened a whole lot of cruft in one program i made.
@cheesy_boya2 ай бұрын
Yep, I'm saving this video
@tolgaflashtr28552 ай бұрын
too* 😂😂
@BohumirZamecnik11 күн бұрын
Very nice. Another useful is formatting float as percent: f"{foo:.2%}".
@sidjay76442 ай бұрын
Very nice Thanks
@kinngrimm2 ай бұрын
Does datetime have a formating depending on nation? Like we would have already through a login or a whois access to a users current or defined whereabouts or nationality and we would want to have their specific way of reading time provided for them.
@MechanicusOfficial19 күн бұрын
I always use pyformat. Very easy to understand and pretty nice too. Var = 15 print(“this is my var: {}”.format(var))
@aliwalil41602 ай бұрын
the last fstring was dope
@mad_vegan2 ай бұрын
To use scientific notation with integers, you can either do int(2e9) or 2*10**9.
@Andrey_Fedorov2 ай бұрын
Круто! Спасибо!
@oldschoolsoldier16342 ай бұрын
Trick #2 is neat
@Sailesh_Bhoite2 ай бұрын
Nice Tricks!
@xKiiyoshiix2 ай бұрын
Hello @Indently, Can you please explain me, why you use ":" after a variable for ex. n:? Regards.
@matthewbay19782 ай бұрын
It allows him to specify what type of variable it is. "n: int = " tells anyone reading that it's an integer. I'm glad you asked that though, because I'm an amateur and I'm curious, @Indently is that common practice?
@swolekhine2 ай бұрын
These will be useful to me for sure. Here's a comment for the algorithm gods!
@0MVR_02 ай бұрын
the thumbnail to this video inspired an idea to use format strings in dictionaries so that a dynamic series of texts can undergo a linear list of mutations. Honestly, I actually need to refine my idea though.
@adeptusmortemАй бұрын
Thank you
@aguy98362 ай бұрын
nice examples
@artistpw25 күн бұрын
Very nice.
@meghanelizondo7742 ай бұрын
I was so stoked when f'{ var = }' was added to Python!! Might be abusing it a bit lol
@casperghst4217 күн бұрын
Intersting, a large part of the world is using . (period) as a 1000 separator and , (comma) as a decimal point.
@sayantanguha19342 ай бұрын
The last one blew my mind
@chrisogonas2 ай бұрын
Awesome! I love the '=' and >
@iscatafan29592 ай бұрын
You make the code easier to read, so you better use the functions of the str class! 🐳
@ArtyomKatsap2 ай бұрын
Hi! Thanks! Great video! Worth mentioning that the last one does not work on older versions of python3 (I tried it on 3.7.17 and it gives a syntax error).
@UndyingEDM20 күн бұрын
Probably added in a later version. I'd love to know which. Edit: it's called self-documenting expression released in Python 3.8
@NickCombs2 ай бұрын
This definitely seems more convenient than it is in js.
@fg7862 ай бұрын
What can you do with print(f'{var: >+{x}}') ? The additional + get's printed in front of var but a - doesn't, you can put a # instead of the + and it's not throwing an error, yet doesn't seem to do anything. Letters and other symbols give an error.
@kinngrimm2 ай бұрын
9:30 that approach though had the single quotation marks removed, which from a formating pov is cleaner, isn't there a version of the first shorter approach without the quotation marks then printed? (edit: while still being flexible in terms of variable names as mentioned)
@MkReman2 ай бұрын
Which code editor do you use? It appears to be pycharm. But the ui is different from what I have in windows laptop.
@meowsqueak2 ай бұрын
It’s the new UI. Perhaps you’re still using the legacy UI?
@Mor3Lif3Ай бұрын
That last one goes wild
@noir66146Ай бұрын
ooh i like these videos logic magic !
@IuseArchbtw-di6cd2 ай бұрын
Hey bro, can you make an easy to digest about python Decorator I've been stuck in this topic for about 2weeks, all the video that i've watched are still hard to digest for my brain I would be glad since you've shown me this cool F-string trick that i never knew existed Thank's in advance
@PanduPoluan2 ай бұрын
A decorator is a syntactic sugar for setting a variable of the same name to the result of applying a fucntion to a function. @decorator1 def func(): ... Is the same as: def func(): ... func = decorator1(func) The key here is that decorator1 _must_ return something that is (1) callable, and (2) has the same arguments as the function it wraps around.
@Indently2 ай бұрын
I have videos about it on my channel, just search "decorators indently"
@Lord22252 ай бұрын
Fact: You can define custom logic for f'string on your classes and get string after : as argument to __format__
@acherongoon2 ай бұрын
My preference is th .format(...) method fo a couple o reasons. I use Micropython a lot and f""" is not or has not been available, for format supports all the styles I like. i8n the string being formatted is not known at development time. Scope, the names using inside the string can be assigned at use time, i.e. in a function the value may be in a variable gmt_time but the string uses a standard name 'time'.
@tudaer2 ай бұрын
May I ask which IDE and development env are you using? Looks so great
@meowsqueak2 ай бұрын
It’s PyCharm
@tudaer2 ай бұрын
@@meowsqueak thanks!
@murphygreen84842 ай бұрын
Don't forget in newer python you can add multiple lines of text by stringing together f strings
@shabadooshabadoo49182 ай бұрын
i dont really know anything about programming or python but im curious. when you do "var:" is the colon part of the variable name? or a requirement for specifying a variable name? if its part of its name, is it to differentiate it from something else?
@AnonHooman2 ай бұрын
The colon after a variable name is for typing the variable, for example: my_var: str = ‘Hello’ We’re saying that my_var is of type str (string) and has the value ‘Hello’. However, the typing is not necessary and my_var = ‘Hello’ would work just as well. Though, most people would recommend to use type hints
@PanduPoluan2 ай бұрын
@@AnonHooman Well if assigning simple, easy-to-infer data for a variable, I usually do away with type-hinting. Type-hinting is a godsend to mark parameters to a function, preventing hard to trace ValueError or TypeError exceptions later on. I usually don't type hints my variables except when I'm doing unpacking.
@ErLakhan17 күн бұрын
Superb
@gopal.Ай бұрын
thanks
@anon_y_mousse2 ай бұрын
I wish more languages would copy this feature, and that Python would allow you to use variables inside the strings to select formatting options. For my own language, I made all strings f-strings and just have a shorthand where "$var" will stringify the value of `var`, and "${ expr }" will stringify the value of any valid expression. I made it so that format specifiers could use a variable instead of a numeric constant in the string. That way you could pad the output to the terminal dependent on the actual terminal attributes without using a loop. I'm hoping that this methodology negates the need for *printf() functions in my language, because separating the variable from any formatting options on it is error prone, and most of the time people just want to print as is.
@Smart_Coder72 ай бұрын
This Video was sponsored by me. 💀
@archiemarqx2 ай бұрын
3:24 this tip will literally improve my code quality
@richardnicholas29572 ай бұрын
Gold!
@VypeReaper2 ай бұрын
Apart from learning about the f condition, I also learned you can declare the data type in python which i have not been doing lol
@Carberra2 ай бұрын
That last tip is the biggest argument against a debugger; if they wanted you to use it, why did they provide that debug syntax? 🤓
@veeratheking83752 ай бұрын
big fan bro from india
@Indently2 ай бұрын
Thanks!
@GW-nh9qc26 күн бұрын
Klasse 😃👍
@midlander81862 ай бұрын
In the first example, int variable n assigned a number in scientific notation returns a float number when printed, but no error occurred. In what sense must n be declared a float therefore?
@meowsqueak2 ай бұрын
It’s not a type declaration, it’s a type hint given as an annotation. Annotations in Python have no effect at run time so no error occurs. They are just hints to a static type checker.
@isodoubIetАй бұрын
Type annotations are just comments, and comments always lie.
@-george-1153Ай бұрын
You're cool! 👍
@rutenowynidoking35932 ай бұрын
For debugging, I recommend the "Icecream" library.
@NC700xLoverАй бұрын
Which editor is that? Looks fresh
@user-hd3pz2ow1b2 ай бұрын
rounding in python .. cool
@eduardolima54952 ай бұрын
Question. Why do you declare the variable with the type? I'm a beginner and I never saw that, it's a good practice?
@alextrebek52372 ай бұрын
Type hints or specifying types are good practice, rather than commenting what should be obvious code. It also enables easier linting and test suites. Google "why type hint" ❤
@PanduPoluan2 ай бұрын
It's called type-hinting. In his example, it doesn't serve much. But in a big program, it will cause the IDE to warn you that you plan on using a variable only to store certain type(s) but you accidentally typed code that assign a different type to it. For instance, say you have result: string = "" Then much later on you assign: result = sorted(some_list) print(result) The IDE will warn you that, "hey, you originally said you're only going to store a string here, but let me warn you, you're about to store a list here." Other than that, Python won't actually error out there.
@PanduPoluan2 ай бұрын
Another example purpose: You assign the result of a function that _declares_ it will return a list of floats def some_func() -> list[float]: ... rslt_list = some_func() Then you do this: print(", ".join(rslt_list)) The IDE will warn you that the str.join() function requires a list of str, but you're calling it with a list of floats. In this case, if you don't heed the warning, your program will raise an error at that point (because of .join()'s requirement).
@PanduPoluan2 ай бұрын
Again, in all case, you're only given a hint that _probably_ something is not quite right. It still won't change Python into a statically-typed language. Just another tool to help a Python Programmer prevent errors due to Type Mismatch.
@eduardolima54952 ай бұрын
@@PanduPoluan bro! Thanks for the answer!! Super detailed!!
@kamurashev2 ай бұрын
Yep, f string is a great feature. At least something Python gives us 😅
@pmenown2 ай бұрын
What does the f prefix do at the beginning of the argument? Are we inserting a blank float?
@mudyeet_2 ай бұрын
Are you talking about the f prefix before the quotes? If yes, then that's "f strings"
@pmenown2 ай бұрын
@@mudyeet_ yeah, like what does an 'f string' even mean? Feel like they missed out on calling it a G string
@andrewmalani188219 күн бұрын
what complier/interpreter does he use?
@mikaelregetz62242 ай бұрын
what theme do you use pycharm
@bilatungdulang97082 ай бұрын
Ehem yo bro, are the "int" word after name variable is static type like variable declaring in rust "let num : i32 = 1000000000"?
@nadkochАй бұрын
No sense, because type sets through assignment. any = 15 If was: any: const = 15 Еlse we have repeat type assignment. any : int = int (15). 🤷♂️