Wednesday, June 24, 2020

Python String Index() Method



Hello guys! Welcome back to another section of my tutorial on Python. In this tutorial guide, we are going to be discussing about the Python String Index() method.

The Python string index() method determines if string str occurs in a string, or in a substring of a string if the starting index beg and ending index end are given. The method is the same as find(), but raises an exception if sub is not found. 

Syntax

The following below is the syntax for the Python String endswith() method -

str.index(str,  beg = 0,  end = len(string) )


Parameter Details

  • str - This specifies the string to be searched. 
  • beg - The is the starting index. By default its 0. 
  • end - This is the ending index. By default it is equal to the length of the string.

Return Value

Returns an index if found, otherwise it raises an exception if str is not found.

Example

The following below is a simple example -

#!/usr/bin/python

str1 = "this is string example....wow!!!";
str2 = "exam";

print str1.index(str2)
print str1.index(str2, 10)
print str1.index(str2, 40)

Output
Below is the output of the above example -

15
15
Traceback (most recent call last):
   File "test.py", line 8, in 
   print str1.index(str2, 40);
ValueError: substring not found

shell returned 1

RECOMMENDED POST: Python Strings Tutorial

Alright guys! This is where we are rounding up for this tutorial post. In my next tutorial, we are going to be discussing about the Python String isalnum() method.

Feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.

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