Tuples

A tuple is a sequence of immutable objects enclosed in parentheses (). The main difference between tuples and lists is that the tuples can't be changed, whereas lists can be changed.

Creating a tuple: The following example shows how to create tuple.

tuple1 = (10, 20, 30, 40, 50)
print(tuple1)

(10, 20, 30, 40, 50)

Accessing Tuple Values: To access tuple values, use index or indices of an element. Indexes starts from 0, index value of 1^st element is 0, 2^nd element is 1 and so on. Python also supports negative indexes which are count from right.

tuple1 = (10, 20, 30, 40, 50)
print("Value at index 2 is:",tuple1[2])
print("Value at index -2 is:",tuple1[-2])

Value at index 2 is: 30
Value at index -2 is: 40

Updating Tuple: Tuples are immutable, which means you can't update or change the values of tuple.

Deleting Tuple Elements: Removing individual tuple elements is not possible. To explicitly remove an entire tuple, just use del statement

Basic Tuple Operations:

1. + Concatenate two tuple and result is a new tuple.

   tuple1 = (10, 20, 30)
   tuple2 = (40, 50)
   print("tuple1 + tuple2 is",tuple1+tuple2)
   

   tuple1 + tuple2 is (10, 20, 30, 40, 50)
   

2. * Repetition of tuple for N times and result is a new tuple.

   tuple1 = (10, 20, 30)
   print("tuple1 * 2 is",tuple1*2)
   

   tuple1 * 2 is (10, 20, 30, 10, 20, 30)
   

3. in Membership operator which returns True when element present in tuple. False otherwise.

   tuple1 = (10, 20, 30)
   print("20 in tuple1 ",20 in tuple1)
   print("40 in tuple1 ",40 in tuple1)
   

   True
   False
   

4. [start:stop:step] Gives access to a specified range of sequence’s elements.

   tuple1 = (10, 20, 30, 40, 50)
   print("tuple1[::] is",tuple1[::])
   print("tuple1[2:] is",tuple1[2:])
   print("tuple1[:3] is",tuple1[:3])
   print("tuple1[::-1] is",tuple1[::-1])
   

   tuple1[::] is (10, 20, 30, 40, 50)
   tuple1[2:] is (30, 40, 50)
   tuple1[:3] is (10, 20, 30)
   tuple1[::-1] is (50, 40, 30, 20, 10)