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

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

This is very clever i solved in two lines of code but this is one line this is better and i appreciate it

the %s are placeholders
the string is formatted by replacing the placeholders with the corresponding values from the tupel.

Backslash "escapes" the following character.
I.e. the "[" looses it's special meaning

Could someone explain why there is the use of \ at the start and end of the regex? Thanks

Could someone explain how the last line works? Thanks!

thats wicked!

You can circumvent having to slice [::-1] twice by adjoining the names with an ampersand, and using the replace function to substitute all but the last ampersand. See my solution for details.

I always think guys who make those codes are robots... (and i always take 3 minute per lines for understanding...)

I am curious that if such short coding has benefits to future works? even reading is complicated!

insanely clever

That's a very nice and clear solution, i like it!

Wow. Amazing!

Great idea reversing the string! I learnt something new today.
And I faced the same problem several times before.