Underscore is just a convention, "k for k,g in groupby(iterable)" also works perfectly.

Your code times out because generating all permutations of long strings beforehand is not the way to solve this kata

Oh my god

It's a method to ignore specific values.

For instance:

a,_,b = (1,2,3)
Then: a=1 and b=3
Another example:

a,*_, b = (1,2,3,4,5,6,7,8)
a = 1 and b = 8

Other function to this is save the last result in "_" variable.

So if you do this:

2+4 -> result= 6

_ -> result= 6 #save the last result in your program.

For separate numbers:

a=100000 #it's confuse to see how many zeros are there.

But you can do:

a= 10_000 #it's the same, but more understandable.

This link helps so much: https://www.datacamp.com/tutorial/role-underscore-python

yea i saw this coming but didnt know what else to write lmao

It absorbs water and electrolytes from food that has remained undigested.

Shit, I thought I had a good solution...

what exactly does the colon do?

Oh my fuck.....

Love this solution! A lot cleaner than the for loop imo

Nice. I learned something new.

Im just gonna kill myself

I love it.