What is use of pop function?

Answer 1

Pop function works with lists in python

List can have number of members.
Now let's take a example to help you to understand pop function

We have a list
list1 = [1,2,3,4,5,6,7]

Now we want to remove 4 from list and want to store it in another variable
So what we will do, we will see what is index of 4 in list1
Index of 4 in list1 is 3

temp = list1.pop(3)
It will remove the member at index 3 which is 4 and will store in temp variable

Run this code in playground

list1 = [1,2,3,4,5,6,7]
temp = list1.pop(3)
print(list1)
print(temp)

Answer 2

list.pop(i) removes and returns item at i (or last item if i isn't specified)

set.pop() removes and returns random item from set

dict.pop(k, d) removes k and returns dict[k]. If k isn't found it returns d or raises KeyError if d isn't specified

Answer 3

set.pop gives you a "random" or at least uncertain value from the set. You may use it if you want to consume values from a set and you don't care in which order. If the order is important then you should use a list instead.