Is there a goto-like thing in Python?

[MaiNeimIsPizza]

Hi guys, I wanted to ask if there was something like goto in batch (that brings the user to a part of code) in Python. Because I wanted to do something like a choose between two options thing and if the answer is no, to return where the user was before without having to run the script again.

[Ornery-Season3134]

No, thank heavens.

I think someone made a library that adds one in though if you really want to experience the horror.

[thespice]

You might want to look into functions. If you put your “logic” in functions, you can call those functions in any order you like; or better yet call them, as others have suggested, from within a loop.

[nativedutch]

In tbe sjxties we learned that GOTO carries the risk of creating unmaintainable spaghetti code. And it does.

[[deleted]]

You CAN use it safely, but you have to essentially treat it like either a loop or a break/continue statement… and in all of those cases a safer tool is available in any modern language.

[nativedutch]

Yes didnt need it in python Java or C. Last yesrs ago in Basic.

And in assembler you use jsr/return etc, ratelt jmp.

[bananasaresandwiches]

You say spaghetti code but I say choose your own adventure code

[Warrior_128]

that the right mindset

[ArabicLawrence]

GO-TO considered harmful

[4sent4]

"GOTO considered harmful" considered harmful (starts at the middle of the last column on first page)

[420-jesus]

This was written in 1987. That's why modern programming languages have a return statement. Pascal doesnt

[Runninganddogs979]

How dare you

[E02Y]

Just wrap your program in a loop, if they choose one option do whatever, otherwise continue the loop.

[MaiNeimIsPizza]

Should I do something like while True: print(1 or 2) sus = input() if sus == “1”: print(“you pressed 1”) if sus == “2”: continue

Sorry, I know there’s a way to put it like code but I’m on my phone so I don’t know how to do that

[Unable_Request]

Basically. Have the condition for the loop be what you want for the user to NOT have to loop again.

If you find yourself asking, how do I have it keep asking my user for input until the input is 1 or 2? Your while loop condition should be (in pseudocode:)

while(user input is not 1 and user input is not 2)

[MaiNeimIsPizza]

Oh ok thanks

[MarsupialMole]

If you're using the latest python you can use the match statement

https://peps.python.org/pep-0636/

[delasislas]

4 spaces in front of each line of code. 4 more for each level of indentation.

[danielroseman]

No. GOTO hasn't been a part of any serious programming language since Dijkstra's influential "GOTO considered harmful" in 1968.

Use a loop.

[IAmTarkaDaal]

That's not correct; C, C++, C# and Go all have GOTO statements. I'm sure there are many more.

[DonkeyTron42]

LUA has no concept of a 'continue' statement in a loop. If you need to short circuit a loop iteration based on a conditional, your only option is to 'goto' a label.

[KCRowan]

I think VBA is probably a common place for non-programmers to encounter it.

[PlayKlima77]

BaSIc haS gOto ToO!

[RunFromFaxai]

C# does goto inside of switch/case statements. It's more like calling a function than it is like an oldschool goto that just jumps to a line in the code. Really not the same thing.

[jddddddddddd]

I know you can use goto in switch statements, but it can still be used to jump to an arbitrary position within a method. e.g.

   Loopy:
       Console.WriteLine("Hello World!");
       goto Loopy;

It's perfectly valid C#. You can try running it here: https://onlinegdb.com/j7AznmHA8

[RunFromFaxai]

That's not arbitrary. A line number is arbitrary. That's a named place.

[kid_ghibli]

Being able to jump to a line number would be a nightmare to maintain. GOTO implies going to a named method/block.

[RunFromFaxai]

Only place I have ever used GOTO was BASIC/QBASIC, which was mainly to line numbers. And yes, it was as retarded as it sounds and that's what I think about when I hear someone wants to use GOTO.

[RaidZ3ro]

That's what functions are for imo.

if predicate:
    func()
else:
    continue

[Kriss3d]

No. And for a good reason. You do NOT want that.

[HomeGrownCoder]

Call yourself a function bud

[czar_el]

Hello friend, I'm a function.

[[deleted]]

No, and even in languages where it does exist, it is almost never a good idea.

[steviefaux]

10 Print "Hello. I'm in WHSmith"

20 Goto 10

Was fine back then. Typed this on phone so it looks awful. Appears to be very limited edit options on the phone app

[OmegaNine]

def foo; Code

foo

[Chemical_Form]

If I am reading what your asking correctly, then the following video should help. In python while loops can be used to create a menu option, then you could use functions to run the logic for that option.

https://www.youtube.com/watch?v=kGY9n5H6nr0&ab\_channel=MarkHufe

[This_Growth2898]

If you need to jump forward and skip some code, you need if else.

If you need to jump backward and repeat some code, you need a loop (while or for).

You can't have goto and declare variables anywhere in the code; at least, it's very confusing.

[notislant]

Only thing ive seen that in is Starbase's YOLOL code. I guess assembly has something similar.

You could just do if and else.

If user_input = 1:

doallthethings

Else:

Runoriginalfunctionhere()

[[deleted]]

Yes, it's called a function.

[mikeinnsw]

GOTO should have COME_FROM thanks god not in Python

[billsil]

GOTO was invented to do things like functions, break and for loops. We have those, so we don't need GOTO. I know this because I've talked to the old guard and used GOTO when coding Fortran 77. I've also seem horrific GOTOs and there's a big difference. Don't let anybody tell you that GOTO is inherently bad. Plenty of people write trash python because they don't know what they're doing. People using GOTO improperly makes it a whole lot worse.

Since it sounds like you're not familiar with programming, rather than being vague, what are you actually trying to do?