Find index of last occurrence of a substring in a string

Question

I want to find the position (or index) of the last occurrence of a certain substring in given input string str.

For example, suppose the input string is

Answer 1

Try this:

s = 'hello plombier pantin'
print (s.find('p'))
6
print (s.index('p'))
6
print (s.rindex('p'))
15
print (s.rfind('p'))