Dictionaries — Question 18

(i) the values are of immutable types
If the values are of immutable types then any changes made in the copy created with copy( ) will not be reflected in the original dictionary.
For example:

d1 = {1:'Neha' , 2: 'Saima' , 3: 'Avnit' , 4: 'Ana'}
d2 = d1.copy()
d2[5] = 'Taru'
print(d2)
print(d1)

Output

{1: 'Neha', 2: 'Saima', 3: 'Avnit', 4: 'Ana', 5: 'Taru'} 
{1: 'Neha', 2: 'Saima', 3: 'Avnit', 4: 'Ana'} 

(ii) the values are of mutable types
If the values are of mutable types then any changes made in the copy created with copy() will be reflected in the original dictionary.
For example:

d1 = {1:[1,2,3] , 2: [3,4,5]}
d2 = d1.copy()
d2[1].append(4)
print(d2)
print(d1)

Output

{1: [1, 2, 3, 4], 2: [3, 4, 5]}
{1: [1, 2, 3, 4], 2: [3, 4, 5]}