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-zurowski10 ай бұрын
ok, my idea didn't work as expected 😅
@dark_brownie7 ай бұрын
Yeah, completely agree it is amazing
@Zenivo10 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.
@andymitchell214610 ай бұрын
I've been using python for about 10 years, and f strings extensively, but never knew that last tip! Game changer!
@yash115210 ай бұрын
well, thats cause its only a very recent one (afaik)
@eyehear109 ай бұрын
@@yash1152it was introduced in 3.8, so a while back
@sunwukong626810 ай бұрын
Ever since I learned f-strings...I love them.
@GentleMannOfHats10 ай бұрын
I wish I had known sooner!!
@rickymort13510 ай бұрын
And I love you.... Sorry if I made things awkward... 😬 Oof this awkward isn't it?
@_Loki__Odinson_10 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.
@Indently10 ай бұрын
That's the hype for type annotations that I love to see!
@Naej710 ай бұрын
Not using type annotations should be banned by law
@_Loki__Odinson_10 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.
@Naej710 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
@edwardcullen173910 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? 🤦♂️
@utarasama10 ай бұрын
The last one is super duper cool!
@dcx4510 ай бұрын
RIP the maintainer
@utarasama10 ай бұрын
@@dcx45 he should then watch this video
@rolandsz88319 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"
@BohumirZamecnik8 ай бұрын
Very nice. Another useful is formatting float as percent: f"{foo:.2%}".
@enriqueDFTL6 ай бұрын
I never use anything other than f-strings when printing and these tips are great. Going to use them!
@TheJaguar198310 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.
@SergioYT205210 ай бұрын
"Simple y bello como un anillo", como diría Neruda; pero además, muy funcional. ¡Muchas gracias!
@mattshu10 ай бұрын
F strings are soo chef kiss
@wceez2 ай бұрын
Python pointing out you’re high. It’s gonna be a game changer when that module drops 😂😂😂 3:50
@krzysiekkrzysiek905910 ай бұрын
This kind of tips are awesone. We need more 👍
@TheMcSebi10 ай бұрын
Great video! Didn't know about the datetime and debug print ones. Definitely going to use them in the future, though.
@KinkyJalepeno6 ай бұрын
This series of vids are the best on youtube - keep it going please, best sub ever.
@alfredo.onyoutube2 ай бұрын
Didn't know the last one! Thanks 👍
@SobTim-eu3xu6 ай бұрын
First is fire Second is fire(unless filling, I know this) Third is like in C#, but without f string Fourth I know, and also like in C#(unless ,.3f, this is fire) Fifth is fire, this is why I live python) 1year+ of python) I use it in cryptography, and numerical methods)
@kinngrimm10 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)
@daveys10 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.
@Indently10 ай бұрын
Earlier I didn't know it worked on whole expressions, I think it's super cool as well!
@viniciomonge39609 ай бұрын
Loved the last trick!!!
@mad_vegan10 ай бұрын
To use scientific notation with integers, you can either do int(2e9) or 2*10**9.
@richsadowsky858010 ай бұрын
Absolutely fantastic and useful video!
@im_a_surfingdoggo10 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.
@Pawlo37010 ай бұрын
Finaly! All fstring variations in one film
@quekki366610 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
@Indently10 ай бұрын
It's a cool trick for sure!
@flashtrack10110 ай бұрын
Love your vids man! would love to see a tutorial on cython from you!
@mjhaynavarro8 ай бұрын
So cool.. thanks for sharing it. very informative
@xKiiyoshiix10 ай бұрын
Hello @Indently, Can you please explain me, why you use ":" after a variable for ex. n:? Regards.
@matthewbay197810 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?
@jaa9289 ай бұрын
Thank you for the instructive tips!
@UndyingEDM8 ай бұрын
For those who didn't know, the last one is called self-documenting expression and was released in Python 3.8
@catastrophicblues1310 ай бұрын
That last one is sooo useful!
@LittleGnawer10 ай бұрын
Nice and useful tricks for every day programming. I also prefer specifying types of variables, since it makes code better understandable.
@karthikkarthik10010 ай бұрын
Last trick was super cool...
@alisajjad24787 ай бұрын
Thanks for the tips. The last trick is amazing
@TheKahunas272200010 ай бұрын
Love the video I knew some of those but the last one is epic I will be using that from now on .
@anon_y_mousse10 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.
@bashar920010 ай бұрын
This is amazing!! thank you for this tutorial!!
@pmenown10 ай бұрын
What does the f prefix do at the beginning of the argument? Are we inserting a blank float?
@mudyeet_10 ай бұрын
Are you talking about the f prefix before the quotes? If yes, then that's "f strings"
@pmenown10 ай бұрын
@@mudyeet_ yeah, like what does an 'f string' even mean? Feel like they missed out on calling it a G string
@sophiophile4 күн бұрын
An f string is a formatted string, where you can put references to variables/objects by wrapping them in curly braces, instead of having to concatenate them- especially since Python strings are immutable. What he is showing off is some of the special extra features available when you follow up the variable/object with a colon to implement some special manipulation of the final string on top of the substitution.
@swolekhine10 ай бұрын
These will be useful to me for sure. Here's a comment for the algorithm gods!
@yash115210 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.
@Lord222510 ай бұрын
Fact: You can define custom logic for f'string on your classes and get string after : as argument to __format__
@tudaer10 ай бұрын
May I ask which IDE and development env are you using? Looks so great
@meowsqueak10 ай бұрын
It’s PyCharm
@tudaer10 ай бұрын
@@meowsqueak thanks!
@kychemclass585010 ай бұрын
Love #5. Thank you.
@kinngrimm10 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.
@meghanelizondo77410 ай бұрын
I was so stoked when f'{ var = }' was added to Python!! Might be abusing it a bit lol
@MechanicusOfficial8 ай бұрын
I always use pyformat. Very easy to understand and pretty nice too. Var = 15 print(“this is my var: {}”.format(var))
@0MVR_010 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.
@archiemarqx10 ай бұрын
3:24 this tip will literally improve my code quality
@asakhhh2 ай бұрын
adding to the note that only underscores and commas can be used: I think we can just apply character replacing to the resulting string
@dipeshsamrawat795710 ай бұрын
Nice collection! 💯
@ChrisHalden00710 ай бұрын
Great video. Thanks
@timegor84410 ай бұрын
Wow, so many simple things I didn't about... Thank you
@Anzeljaeg10 ай бұрын
This is pure gold 🥇
@elbadrey5 ай бұрын
Honestly l 💖 your style explanation, and knowledge. How do you get this information, what books you read, or perfect roadmap with reference to follow.
@eloyam99733 ай бұрын
The last one was 🔥
@cheesy_boya10 ай бұрын
Yep, I'm saving this video
@tolgaflashtr285510 ай бұрын
too* 😂😂
@alex_chugaev5 ай бұрын
Honestly, adding that much syntactic sugar to programming language only makes it worse, not better. I’d prefer pure functions with clear names which do the work. Such code would be easier to maintain.
@casperghst428 ай бұрын
Intersting, a large part of the world is using . (period) as a 1000 separator and , (comma) as a decimal point.
@ArtyomKatsap10 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).
@UndyingEDM8 ай 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
@nuynobi6 ай бұрын
Only the last one is specific to f-strings though, right? The rest are all just general string formatting techniques. Good tips nonetheless.
@itsmeashbeel91753 ай бұрын
No I believe you need to use fstring for all examples. You can tell by the use of code in curly brackets. In other strings the curly brackets won't do anything code related
@nuynobi3 ай бұрын
@@itsmeashbeel9175 Negatory. He demonstrates them using fstrings but they need not be. All but one of these tips can be used to format a regular string with its `format` method (ie 'new style' string formatting which uses curly braces to indicate replacements, just like fstrings do).
@rahulCoding10 ай бұрын
Great video.... Thanks a lot😍👍
@acherongoon10 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'.
@griffgruff110 ай бұрын
Great video!
@vedantkanoujia7 ай бұрын
you helped me for spaces , I used it in list with \t
@NickCombs10 ай бұрын
This definitely seems more convenient than it is in js.
@andrewmalani18828 ай бұрын
what complier/interpreter does he use?
@shabadooshabadoo491810 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?
@AnonHooman10 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
@PanduPoluan10 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.
@Angelinajolieshorts10 ай бұрын
Great work sir❤
@aliwalil416010 ай бұрын
the last fstring was dope
@eugenepark6 ай бұрын
Is it possible to combine f"{n:,}" and f"{n:20}" somehow? or are they an exclusive or
@AlexV64 ай бұрын
Yes, you should use 'nested f-strings'.
@bitelogger5 ай бұрын
Hi, please which IDE are you using on this video?
@murphygreen848410 ай бұрын
Don't forget in newer python you can add multiple lines of text by stringing together f strings
@yelircaasi9 ай бұрын
Which editor is that? Looks fresh
@Krullfath10 ай бұрын
This is super cool, I sadly can't think of any usecases in my current project
@sayantanguha19349 ай бұрын
The last one blew my mind
@dark-ghost413210 ай бұрын
Thank for nice tricks 😘
@kinngrimm10 ай бұрын
in the first example, do you know what decimal points wouldn't work?
@cktan02 ай бұрын
Tip 5 should be tip 1
@MahdiImeni10 ай бұрын
Loved it ❤
@Mor3Lif39 ай бұрын
That last one goes wild
@midlander818610 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?
@meowsqueak10 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.
@isodoubIet9 ай бұрын
Type annotations are just comments, and comments always lie.
@mrjamesflores10 ай бұрын
The last one was good!
@sidjay764410 ай бұрын
Very nice Thanks
@paternyao10 ай бұрын
What is this IDE? The console right below is so cool
@Indently10 ай бұрын
PyCharm
@philluvschips37879 ай бұрын
Hi, if I have a number 1234.5678, how do I use a combination of , separators make it 2 decimal places so I get 1,234.56?
@radoharilalaandriamananjar63477 ай бұрын
Can we use f" " in logger ?
@eduardolima549510 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?
@alextrebek523710 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" ❤
@PanduPoluan10 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.
@PanduPoluan10 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).
@PanduPoluan10 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.
@eduardolima549510 ай бұрын
@@PanduPoluan bro! Thanks for the answer!! Super detailed!!
@VypeReaper10 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
@kinngrimm10 ай бұрын
thanks for the showcases
@mikaelregetz622410 ай бұрын
what theme do you use pycharm
@Carberra10 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? 🤓
@Observer55210 ай бұрын
What IDE are you using? It looks like VSCode but seems like not
@meowsqueak10 ай бұрын
PyCharm
@rutenowynidoking359310 ай бұрын
For debugging, I recommend the "Icecream" library.
@kaifscarbrow10 ай бұрын
7:01 Bummed that you didn't mention that changing f to e gives you the number's scientific representation
@callejohansson573210 ай бұрын
This gave you a chance to look clever. Be grateful.
@Sailesh_Bhoite9 ай бұрын
Nice Tricks!
@fg78610 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.
@noir661469 ай бұрын
ooh i like these videos logic magic !
@bilatungdulang970810 ай бұрын
Ehem yo bro, are the "int" word after name variable is static type like variable declaring in rust "let num : i32 = 1000000000"?
@nadkoch9 ай 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). 🤷♂️
@brycesakal37177 ай бұрын
My professor who I took intro to Python called the “” ‘right justify and left justify’