What does that this function signifies?...Can you please make me understand?

Question

print ("{0}{1}{0}".format('abra','cad'))

Answer 1

Its replacing the placeholders {...}.

{0} = first item
{1} = second item

So "abra" + "cad" + "abra"

Answer 2

{0} equals first argument passed into the format function
{1} equals second argument passed into the format function
{2} equals third argument passed into the format function
And so on...
So output would be
abracadabra
It's also the same as:
print(f"{'abra'}{'cad'}{'abra'}")

Answer 3

{0}{1}{0}={abra}{cad}{abra}

Answer 4

What??