.rfind()

.rfind() searches a given string for a substring starting from index 0, or alternatively, from the ith index to jth index (where i < j). The method returns the starting index of the last occurrence of the substring.

Syntax

mystr.rfind(value, start, end)

This method is called on a string mystr and returns the last index where the substring value is found by searching the original string mystr from the start index to the end index, and if the substring is not found it returns -1.

Example

In the following example, .rfind() is used to search for several substring values in the original string mystr.

mystr = "This is a python string"
str1 = "Hello"
str2 = "is"
str3 = "py"
str4 = "str"

print(mystr.rfind(str1))
print(mystr.rfind(str2,2,5))
print(mystr.rfind(str3,0,15))
print(mystr.rfind(str4,10,20))

The output of the above code will be:

-1
2
10
17