Python RFind

Python rfind

The Python rfind method is used to return the index position of the last occurrence of a specified string. Python rfind function return -1 if the specified string not found.

In this section, we discuss how to write Python rfind Function with example and the syntax is

String_Value.rfind(Substring, Starting_Position, Ending_Position)
  • Substring: String you want to search for.
  • Starting_Position: If you want to specify the starting index position, then Please specify the index value here. If you Omit this parameter then, Python rfind Function considers Zero as a starting position.
  • Ending_Position: If you want to specify the endpoint (Ending position), then Please specify the index value here. If you Omit this parameter then, it considers the highest number.

Python rfind method Example

The following set of examples help you understand the Python rfind Function. The index position in rfind Function start from 0, Not 1.

For Str2, it finds the last occurrence of a substring ‘abc’ inside the Str1 using rfind function and prints the output. If it does not find the specified string inside the Str1, it returns -1. That’s why, it returned -1 for Str4.

It allows us to use the Starting index position. For Str5, we used 5 as the start point.

The Python rfind function also allows us to use Starting and ending indices. By specifying the starting and ending index positions, we can increase performance. The following String Method statement starts looking for ‘abc’ from index position 2 and ends at 21. As we all know, that last occurrence of abc is at position 22, but the Python function stops at 21 so, it returns the abc at position 7.

Str1 = 'We are abc working at abc company';
Str2 = Str1.rfind('abc')
print('First Output  = ', Str2)

# Performing directly
Str3 = 'Find Tutorial at Tutorial Gateway'.rfind('Tutorial')
print('Second Output  = ', Str3)

# Searching for Not existing Item
Str4 = Str1.rfind('Tutorial')
print('Third Output  = ', Str4)

# Using First Index while finding the String
Str5 = Str1.rfind('abc', 5)
print('Fourth Output  = ', Str5)

# Using First & Second Index while finding the String
Str7 = Str1.rfind('abc', 2, 21)
print('Sixth Output  = ', Str7)
Python RFind