The syntax of the tuple index()
method is:
tuple.index(element, start, end)
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
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.
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
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
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