NCERT Book Class 11 Computer Science Tuples and Dictionaries

10.1 INTRODUCTION TO TUPLES

A tuple is an ordered sequence of elements of different data types, such as  integer, float, string, list or even a tuple. Elements of a tuple are enclosed in parenthesis (round brackets) and are separated by commas. Like list and string, elements of a tuple can be accessed using index values, starting from 0.

Example 10.1

#tuple1 is the tuple of integers

>>> tuple1 = (1,2,3,4,5)

>>> tuple1

(1, 2, 3, 4, 5)

#tuple2 is the tuple of mixed data types

>>> tuple2 =('Economics',87,'Accountancy',89.6)

>>> tuple2

('Economics', 87, 'Accountancy', 89.6)

#tuple3 is the tuple with list as an element

>>> tuple3 = (10,20,30,[40,50])

>>> tuple3

(10, 20, 30, [40, 50])

#tuple4 is the tuple with tuple as an element

>>> tuple4 = (1,2,3,4,5,(10,20))

>>> tuple4

(1, 2, 3, 4, 5, (10, 20))

If there is only a single element in a tuple then the element should be followed by a comma. If we assign the value without comma it is treated as integer. It should be noted that a sequence without parenthesis is treated as tuple by default.

#incorrect way of assigning single element to

#tuple

#tuple5 is assigned a single element

>>> tuple5 = (20)

>>> tuple5

20

>>>type(tuple5) #tuple5 is not of type tuple

<class 'int'> #it is treated as integer

#Correct Way of assigning single element to

#tuple

#tuple5 is assigned a single element

>>> tuple5 = (20,) #element followed by comma

>>> tuple5

(20,)

>>>type(tuple5) #tuple5 is of type tuple

<class 'tuple'>

#a sequence without parentheses is treated as

#tuple by default

>>> seq = 1,2,3 #comma separated elements

>>> type(seq) #treated as tuple

<class 'tuple'>

>>> print(seq) #seq is a tuple

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