# Write a Python program to swap two elements in a list 
 # Python3 program to swap elements
# at given positions


# Swap function
def swapPositions(list, pos1, pos2):
     
    list[pos1], list[pos2] = list[pos2], list[pos1]
    return list


# Driver function
List = [23, 65, 19, 90]
pos1, pos2  = 1, 3


print(swapPositions(List, pos1-1, pos2-1))