What is Scope in Python??
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- เผยแพร่เมื่อ 5 ก.ย. 2024
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Would have been good if you covered how scopes relate to loop bodies and if/else blocks, because it's not intuitive in python. For example, in every language which I'm familiar with besides python, a variable declared inside an if block is scoped to that block, and not accessible outside it. This is not the case in python.
2:34 while this is indeed obvious for anyone experienced with interpreted languages, it could be confusing for begginers coming from compiled languages, like C, which is quite commonly used in intro to programming classes, so it's worth to point it out.
I think you meant it's obvious for anyone experienced with compiled languages.
Some interpreted languages like JavaScript, awk, various BASIC dialects, and some flavors of shell script do not require variables to be defined before they are used.
I've never encountered a compiled language that allows you to use a variable without first defining it.
these are VERY important things to learn, love the video and thanks for the clear + concise explanation!!
Great stuff! Good to learn more about how Python "thinks" lol
Love the videos. Concise yet full of information for new learners. Thanks.
Your explanation of coding is truly ingenious. Suddenly, all those encrypted coding lines aren't that confusing anymore.
really informative
😍😍😍😍😍
Bro you are insane, can you do a python course , by the way where do you get all this knowledge
Thank you for this video!
Wow this was awesome. Your channel is criminally underrated!
Man your video really helps. I couldn't understand the explanation on the official doc. Tyvm!
ur channel deserves more subs. Your content is amazing👍
What if you want to reference a local variable two scopes out, how would you do that? Nonlocal only references the previous scope and global only references the global scope.
def outer():
x = 1
def inner():
# x = 2
def func():
nonlocal x # refers to x=1
If you uncomment the x=2 line, you'd be referencing that x variable instead, and you'd be forced to rename one of those two x variables to be able to reference both of them.
The nonlocal keyword is kind of a hack because Python is designed in a way that it prefers creating shadowed variables instead of unexpectedly modifying variables from outside scopes.
Unfortunately, that means you encounter variable shadowing issues more frequently if you don't name things uniquely enough, along with the surprising error that is the answer to the poll question.
@@epsi so the only way is basically to rename them or remove them
@@montagetm
Yes, but that's true for any other language as well.
Variable shadowing: just don't do it.
Probably one of the most important videos to watch if someone is new to python
Great explanation of scope! You made it very easy to understand!
thanks man
Thanks man what a smooth explanation
Best scope explanation ever, many thanks to you
If there were 4 functions nested then would there be a way to access the 2nd function’s variable in the innermost 4th function?
Amazing Explanation , Thank you.
Great explanation with examples ! Bravo
I would love to see kind a approach about OOP. Because sometimes there is an overkill to use it. But otherwise its good practice i think. What do you think or whats your approach. I tend to do less OOP cause often "one time" use of my scripts
Beautifully taught!
bro literally did a few vids and already 82k subs, gut 4 u
Thnak you broo!!!
Can you share what color theme you are using?
Good video
I like the way you explain things. Subscribe button smashed.
1:37 by first-indentation he means that variable was defined outside of classes and functions. This part confused me too because I though that he meant 1st line.
I knew of "global", but I didn't know about "nonlocal"
Thanks, you answered my awaited long question.
very good explanation... very helpful
Ty
the music is fire it got me dancing. and it remind me of minecraft
Thank you for this great explaination!
Which theme you are using?
Lovely video!
great explanation
Great stuff
Could you do a video which does a clear breakdown of classes?
I didn't participate in the poll, but from very recent experience I knew it would be an error as soon as I looked at it. A couple weeks ago I was working on a script where I wanted to redefine a global variable, but I didn't use global inside the function. What's even weirder is I tried doing it with 2 different variables, and only the second one gave an error. The first variable was redefined, and printed what I was expecting, but then I got the error when trying to print the second variable. This may be a bug in Python 3.10 that I need to further explore.
9:17 This whole thing is a disgusting mess
Can you do a video on 360 no scope in Python next?
2:30 not obvious if you coming from a compiled language.
I learned this on practice, i wish i viewed this video before
i though python was interpreded so it reads code line by line, shouldn't it print x and then make a local variable x instead of giving error
what is your theme vscode ?
What is the name of the theme?
There is no compile time in python, it is called interpret.
What font is that? And what theme?
SynthWave '84
5:26
bru put the music louder pls
dont use global guys.
This language is conflicting coming from C++. We were taught that this kind of programming was for those ignorant BASIC programmers of the 70s. 😳
Too basic for me
Js scope is better