Swap slices of indexes using a function

Question

Follow-up question of: Python swap indexes using slices

r = [\'1\', \'2\', \'3\', \'4\', \'5\', \'6\', \'7\', \'8\'] 

If I want to swap sli

Answer 1

Without any calculation, you can do :

def swap(r,a,b,c,d):
   assert a<=b<=c<=d  
   r[a:d]=r[c:d]+r[b:c]+r[a:b]