Today I Discovered Something New in Python #python #pythonprogramming #learnpython

Показать описание

Today I discovered something new in Python. #python #pythonprogramming #learnpython

Рекомендации по теме

Комментарии

Makes sense when you consider that objects in python are always passed by reference and the list is only storing a reference to itself, I bet a lot of other languages handle it the same way. It's not much different than assigning self to a property of an object during init. You should probably avoid using it ever since it will break any method that steps into a list recursively, like flattening a list.

mattbarker

This is interesting what if you want to yield from this list ?

alexandarjelenic

There's a similar but more useful thing with types, where you can say e.g. type Directory = list[File | Directory] to include arbitrarily nested instances of the thing you're defining

jamesarthurkimbell

The list being a reference, a number pointing to a place in memory (and other metadata), makes this possible. It's also interesting how the to_string method checks if the pointer element is the same as the current list element, so it returns an ellipsis instead of calling itself infinitely.

valcubeto

It's interesting; we have not encountered this till now. We would love to deep dive into its concepts; kindly make a video on the same.

ANANDVASHISHTHA-oi

I wonder how it's implemented, and if it works in all places and with all reasonable combinations of standard container types

vytah

Wooow, awesome, please make a detailed video about it

Ironnman

Never seen this. Nice that Python detects this and avoids getting into an infinite loop. I wonder what happens if you have a loop of references? Does it show that when it first hits an object it already printed?

TheJaguar

Damm, didn't know about it Thanks!

viddeshk

Hm. Maybe make two lists, a and b, and append each to both?

OneWeirdDude

I noticed you changed from pycharm to zed. I’ve been loving using that editor 😊

theme

Why are referring to it by python index rather than cardinal index

PolargeddonYT

I don't think there is much practical use for that behavior (but maybe I am wrong). It sure looks like an unintentional consequence of referencing by memory address.

Bolsonaro_em_Haia

How to make an object impossible for the garbage collector to delete it automatically (ref count never goes to zero).

davidt

if you look into the runtime method of a function(also treat as an object in python), you will find __call__ method of it. since __call__ its own is a function too, it has __call__ too. and in debugger you will find infinite recursive __call__.

KuRRe