I Can't Believe THIS Works In Python #code #python #programming

I can't believe this works in Python

[cover]

Only do that for pure functions! Or else everything will catch fire

[Smbrine]

Not only it can cause memory leaks, but one may accidentally introduce a bug that will be really hard to catch since cache is a decorator, not in a function itself

[kenarnarayaka]

Only do this for pure functions - which are functions which ALWAYS return a specific output given a specific input.

[rutvikrana]

@cache
def randomNumber(n):

👁️ 👄 👁️

[ffelegal]

Silence, python developers are learning about cache.

[travelan]

This only works for pure functions though

[__mrmino__]

Don't use it on methods. Pure functions only. Bugs and leaks otherwise.

[bloom]

Yes this is useful but also very basic. The python decorator is a nice QoL but in general if you care about performance you should do the caching manually using an array or dictionary. Also if you REALLY care about performance, then don't use python⭐️

[ttoommxxmmoott]

Quite often, implementing your own cache can be much faster.

[wedgeguyfr]

What does "input_" do? I mean the underscore after input.

[MasonSchmidgall]

Just don't use this if the function has side effects

[vorkutavorkutlag]

what would happen if there's randomness in the func?

[diamond]

Me and my friend were trying to optimize a program, and we turned it into a competition. He used your method. I used a dictionary. My method was significantly faster with only a few more lines than his.

[markusklyver]

Python scriptkiddie learns about memoization.

[Robert-qwlr]

that's wicked. I'm putting that in tomorrow

[ordinarygg]

please guys just read std library first, all those tik-toks style videos is just docs

[mpty]

if the process is already taking much of the memory, isnt it going to add up quickly with number of calls with different inputs

[dipeshsamrawat]

Hey! It's nice.
Can you please clarify what's difference between the following two:
1. @lru_cache
2. @cache

lru stands for Least Recently Used. They both decorators come from `functools` library, and work exactly same.

[Kdr]

This can be good but the cache need to be clean or it's automatic and where he's going like ram or ssd ?

[joopie]

Don't know why so many people on YouTube are so hyped about this. It's like you never heard of caching before, this approach is extremely limited and only works/benefits algorithms which return a constant result given an input, with these computations most of the time being instantaneous anyways (such as an equation) or precalculated. Not to even mention the memory usage