RFind()
The Python RFind method is one of the Python String Method which is used to return the index position of the last occurrence of a specified string. It will return -1, if the specified string is not found. In this article we will show you, How to write RFind() Function in Python Programming with example.
TIP: The index position in Find() Function will start from 0, Not 1.
Python RFind Syntax
The basic syntax of the Python RFind function is as shown below:
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String_Value.RFind(Substring, Starting_Position, Ending_Position) |
- String_Value: Please select the valid String literal.
- Substring: Please specify the string you want to search for.
- Starting_Position: This is an optional parameter. If you want to specify the starting point (starting index position) then, Please specify the index value here. If you Omit this parameter then, RFind() Function will consider Zero as starting position.
- Ending_Position: This is an optional parameter. If you want to specify the end point (Ending index position) then, Please specify the index value here. If you Omit this parameter then, RFind() Function will consider the highest index number
Python RFind method Example
The following set of examples will help you understand the RFind() Function in Python.
PYTHON CODE
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# Python RFind Method Example Str1 = 'We are abc working at abc company'; Str2 = Str1.rfind('abc') print('First Output of a RFind() method is = ', Str2) # Performing RFind() function directly Str3 = 'Find Tutorial at Tutorial Gateway'.rfind('Tutorial') print('Second Output of a RFind() method is = ', Str3) # Searching for Not existing Item Str4 = Str1.rfind('Tutorial') print('Third Output of a RFind() method is = ', Str4) # Using First Index while finding the String Str5 = Str1.rfind('abc', 5) print('Fourth Output of a RFind() method is = ', Str5) # Using First & Second Index while finding the String Str7 = Str1.rfind('abc', 2, 21) print('Sixth Output of a RFind() method is = ', Str7) |
OUTPUT
ANALYSIS
First we declared the String variable Str1 and assigned corresponding value using following statement
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Str1 = 'We are abc working at abc company'; |
Following statement will find the last occurrence of a substring ‘abc’ inside the Str1 using RFind() function and prints the output
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Str2 = Str1.rfind('abc') print('First Output of a RFind() method is = ', Str2) |
If the Python RFind function does not find the specified string inside the Str1, it will return -1
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Str4 = Str1.rfind('Tutorial') print('Third Output of a RFind() method is = ', Str4) |
The Python RFind() function allows us to use Starting index position. By specifying starting index position we can increase the performance
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Str5 = Str1.rfind('abc', 5) print('Fourth Output of a RFind() method is = ', Str5) |
The RFind() function in Python allows us to use Starting and ending indices. By specifying starting and ending index position we can increase the performance. Following statement will start 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 function will stop at 21 so, it will return the abc at index position 7.
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Str7 = Str1.rfind('abc', 2, 21) print('Sixth Output of a RFind() method is = ', Str7) |
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