THIS Python Trick Seriously CHANGED My Life

This Python trick seriously changed my life. #python #code #shorts

[Pardenoeo]

same damn thing with a lower readability

[BelovedNL]

I’ve never seen the benefit other than cleaner code. At the cost of becoming less readable/intuitive and no efficiency gains. It still feels like a ‘my epenis is bigger than yours’ play, but by all means: proof me wrong!

[milesstripling]

List comprehension has always been a tad confusing and haven’t gotten it yet but this makes it clear as day.

[zgliu]

My take: if there are two "for"s in a list (or any iterable) comprehension, it shouldn't be a list comprehension. Two regular for loops are better readable and understandable, and even a comprehension in a for loop is more acceptable

[harisnadeem]

Flat map is easier to read/reason and consistent with other languages like Scala and JavaScript

[JordanMetroidManiac]

The location of “if” inside the comprehension greatly matters as well, should you have to use it.

[alireza]

The only issue with list comprehension is that it keeps a new list in memory, and in the event of a very long list, it can cause memory issues.

[alkebabish]

Oh that's a good way to explain it, I always found nested list comprehension a bit confusing

[gaaraxpo]

Don't use list comprehension for more than 1 for-loop

[linatroshka]

Nested for loops have some downsides. Like time complexity of n squared. Which is fine for a list of 2 elements but not OK if you collection is much much larger...

[PabloBianchiOK]

There's any other reason, beside being adults?

[stevengorlich]

That’s not a trick. That is just python 101 and surprising if you’re coming from java or so…

[Ayotundejerry]

Does using list comprehensive reduce the time complexity of this code?

[Kuba-zljp]

for what purpose? this is still o(n^2)

[ProjectBimmers]

I learned this correct the first time. So no need to revisit. I love comprehensions

[ThothAmon]

Using a generator and yielding each element within each nest is another approach...

[MyManJohnny]

The comprehension does something completely different than what the double for loop does.. at least keep it consistent.

[__christopher__]

What did the Python developers think here? Clearly the logical thing would be to have the for terms in opposite order in the list comprehension.

[ahmednishaal]

nice, thats a neat way of thinking about it

[therealchicken]

I didnt want to learn them yet and bro just explained it to me fucking perfectly