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Describe index(str, beg=0, end=len(string)) with example

Answer»

The method index( ) determines if string str occurs in string or in a substring of string if starting indexbeg and ending index end are given. This method is same as 

find( ), but raises an exception 

if sub is not found.

Syntax 

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

Example 

# !/usr/bin/python

str = “this is string example….wow!!!”;

str = “exam”; 

print str.index(str); 

print str.index(str, 10); 

print str.index(str, 40);

OUTPUT 

15 

15 Traceback (most recent call last): 

File “test.py”, line 8, in

print str.index(str, 40); 

ValueError: substring not found 

shell returned 1


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