How do I find the duplicates in a list and create another list with them?

Question

How can I find the duplicates in a Python list and create another list of the duplicates? The list only contains integers.

Answer 1

use of list.count() method in the list to find out the duplicate elements of a given list

arr=[]
dup =[]
for i in range(int(input("Enter range of list: "))):
    arr.append(int(input("Enter Element in a list: ")))
for i in arr:
    if arr.count(i)>1 and i not in dup:
        dup.append(i)
print(dup)