how to find first and last index of substring python code example

Example: lastindexof python

# using rindex() 
test_string = "abcabcabc"
  
# using rindex() 
# to get last element occurrence 
res = test_string.rindex('c')   
# printing result 
print ("The index of last element occurrence: " + str(res))

OUTPUT:
  The index of last element occurrence: 8