Table of Contents
The index() method returns the index of the specified element in the tuple.
The syntax of the tuple index()
method is:
tuple.index(element, start, end)
1. Tuple index() parameters
The tuple index()
method can take a maximum of three arguments:
- element – the element to be searched
- start (optional) – start searching from this index
- end (optional) – search the element up to this index
2. Return Value from Tuple index()
- The
index()
method returns the index of the given element in the tuple. - If the element is not found, a
ValueError
exception is raised.
Note: The index()
method only returns the first occurrence of the matching element.
3. Example 1: Find the index of the element
# vowels tuple vowels = ('a', 'e', 'i', 'o', 'i', 'u') # index of 'e' in vowels index = vowels.index('e') print('The index of e:', index) # element 'i' is searched # index of the first 'i' is returned index = vowels.index('i') print('The index of i:', index)
Output
The index of e: 1 The index of e: 2
4. Example 2: Index of the Element not Present in the Tuple
# vowels tuple vowels = ('a', 'e', 'i', 'o', 'u') # index of'p' is vowels index = vowels.index('p') print('The index of p:', index)
Output
ValueError: tuple.index(x): x not in tuple
5. Example 3: Working of index() With Start and End Parameters
# alphabets tuple alphabets = ('a', 'e', 'i', 'o', 'g', 'l', 'i', 'u') # index of 'i' in alphabets index = alphabets.index('e') # 2 print('The index of e:', index) # 'i' after the 4th index is searched index = alphabets.index('i', 4) # 6 print('The index of i:', index) # 'i' between 3rd and 5th index is searched index = alphabets.index('i', 3, 5) # Error! print('The index of i:', index)
Output
The index of e: 1 The index of i: 6 Traceback (most recent call last): File "<string>", line 13, in <module> ValueError: tuple.index(x): x not in tuple
Related posts:
Python Anonymous / Lambda Function
Python id()
Python Program to Merge Mails
Python Program to Check if a Number is Positive, Negative or 0
Python Dictionary fromkeys()
Python String rsplit()
Python Program to Concatenate Two Lists
Python Set difference_update()
Python String upper()
Python Modules
Python String rfind()
Python String split()
Python String isdigit()
Python String rindex()
Python String center()
Python print()
Python Program to Check Prime Number
Python Program to Check if a Key is Already Present in a Dictionary
Python staticmethod()
Python String isspace()
Python Tuple count()
Python ord()
Python String count()
Python Program Read a File Line by Line Into a List
Python zip()
Python input()
Python Program to Differentiate Between del, remove, and pop on a List
Python Program to Reverse a Number
Python Namespace and Scope
Python String swapcase()
Python Program to Print all Prime Numbers in an Interval
Python Program to Convert Decimal to Binary, Octal and Hexadecimal