# 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))