Tuples

Tuples¶

• Tuples are used to store multiple items in a single variable.
• Tuples are immutable, meaning once created, their elements cannot be changed.

Tuple is Immutable¶

In [1]:

my_tuple = (1, 2, 3)
my_tuple[0] = 5
# my_tuple[0] = 10  # This will raise an error

my_tuple = (1, 2, 3) my_tuple[0] = 5 # my_tuple[0] = 10 # This will raise an error

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[1], line 2
      1 my_tuple = (1, 2, 3)
----> 2 my_tuple[0] = 5
      3 # my_tuple[0] = 10  # This will raise an error

TypeError: 'tuple' object does not support item assignment

Indexing and Slicing¶

In [8]:

t = ('a', 'b', 'c', 'd', 'e')
print(t[0])       # First element
print(t[-1])      # Last element
print(t[1:4])     # Slicing
print(t[::-1])    # Reversed

t = ('a', 'b', 'c', 'd', 'e') print(t[0]) # First element print(t[-1]) # Last element print(t[1:4]) # Slicing print(t[::-1]) # Reversed

a
e
('b', 'c', 'd')
('e', 'd', 'c', 'b', 'a')

Tuple Methods¶

Method	Description	Example Code	Output
count()	Returns the number of times a value appears	t = (1, 2, 1) t.count(1)	2
index()	Returns the index of the first matching value	t = (10, 20, 30) t.index(20)	1

In [2]:

my_tuple = ('apply', 'coco', 'sdfjh', 'mango')
my_tuple.index('coco')

my_tuple = ('apply', 'coco', 'sdfjh', 'mango') my_tuple.index('coco')

Out[2]:

1

Exercise : Create a tuple of 5 artists.¶

• Print the first and last artists.
• Print a slice from second to fourth artists.
• Count a particular artists (create some duplicate in the tuple for this).
• Try modifying an element (and observe the error).

Unpacking a tuple¶

In [ ]:

In [10]:

country_1, country_2, country_3 = ('Nepal', 'Japan', 'India')
print(country_1)
print(country_2)
print(country_3)

country_1, country_2, country_3 = ('Nepal', 'Japan', 'India') print(country_1) print(country_2) print(country_3)

Nepal
Japan
India

Add new element in Tuple¶

In [11]:

t = ('a', 'b', 'c', 'd', 'e')

t = ('a', 'b', 'c', 'd', 'e')

In [ ]: