Rindex () string in python

File handling | Python functions | rindex | String Variables

Michael Zippo 18.07.2021

Syntax :

str.find (sub, start, end)

Parameters:

sub: It’s the substring which needs to be searched in the given string.
start: Starting position where sub is needs to be checked within the string.
end: Ending position where suffix is needs to be checked within the string.

NOTE. If no start and end indexes are provided, then it defaults to 0 and length-1 as start and end indices, where end indices are not included in our search.

Return:

Returns the highest index of the substring inside the string if substring is found. Otherwise it raises an exception.

Examples :

 input: text = ’geeks for geeks’ result = text.rindex (’ geeks ’) output: 10 input: text =’ geeks for geeks’ result = text.rindex (’ge’) output: 10

Errors and exceptions:
ValueError : This error occurs when no argument string is found in the target string.

CODE 1

   
 Output: 
 Substring ’geeks’: 10 
  Code 2  
 
      # Python -code to demonstrate how rindex () works  
   text   =  ’ geeks for geeks’  
   
   result   =   text.rindex (  ’geeks’  ) 
   print   (  "Substring’ geeks’: " , result) 
 
        
      # Python code to show the error using rindex ()  
   text   =   ’geeks for geeks’  
    
   result   =   text.rindex (  ’pawan’  ) 
   print   (  "Substring’ pawan’: " , result)

Error:

 Traceback (most recent call last): File "/ home / da dc555d90806cae90a29998ea5d6266.py ", line 6, in result = text.rindex (’ pawan’) ValueError: substring not found

CODE 3

# Python code to demonstrate how rindex () works
# with the specified range

quote = ’geeks for geeks’

# The substring is searched for in & # 39; geeks for geeks & # 39;

print (quote.rindex ( ’ge’ , 2 ))

# The substring is searched in the range from 0 to 10

print (quote.rindex ( ’geeks’ , 0 , 10 ))

Output:

 10 0

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Rindex () string in python

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