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string.index() - string


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

  • str -- This specifies the string to be searched.

  • beg -- This is the starting index, by default its 0.

  • end -- This is the ending index, by default its equal to the length of the string.


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



str1 = "this is string!!!";
str2 = "exam";

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

Output / Return Value

Index if found otherwise raises an exception if str is not found.

15 15 Traceback (most recent call last): File "", line 8, in print str1.index(str2, 40); ValueError: substring not found shell returned 1


Alternatives / See Also