Frozen set behavior in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an immutable set using the correct function.

Python

my_set = [1]([1, 2, 3])
print(my_set)

Drag options to blanks, or click blank then click option'

Aset

Bfrozenset

Clist

Dtuple

Attempts:

3 left

💡 Hint

Common Mistakes

Using set() instead of frozenset() which creates a mutable set.

Using list() or tuple() which are not sets.

The frozenset() function creates an immutable set in Python.

2fill in blank

medium

Complete the code to check if an element exists in a frozen set.

Python

fset = frozenset([10, 20, 30])
if [1] in fset:
    print("Found")
else:
    print("Not found")

Drag options to blanks, or click blank then click option'

A20

B15

C25

D40

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for a number not in the frozen set, which results in "Not found".

Using a variable name instead of a value.

20 is an element of the frozen set, so the condition is true and "Found" is printed.

3fill in blank

hard

Fix the error in the code by choosing the correct method to add an element to a frozen set.

Python

fset = frozenset([1, 2, 3])
fset = fset.[1]([4])
print(fset)

Drag options to blanks, or click blank then click option'

Aadd

Binsert

Cunion

Dappend

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use add() or append() which do not work on frozen sets.

Using insert() which is not a set method.

Frozen sets are immutable, so you cannot use add(). Instead, use union() to create a new frozen set with the added element.

4fill in blank

hard

Fill both blanks to create a frozen set from a list and check if it is a subset of another frozen set.

Python

fset1 = frozenset([1])
fset2 = frozenset([1, 2, 3, 4, 5])
print(fset1.[2](fset2))

Drag options to blanks, or click blank then click option'

A[1, 2, 3]

B(1, 2, 3)

Cissubset

Dissuperset

Attempts:

3 left

💡 Hint

Common Mistakes

Using a tuple instead of a list to create the frozen set.

Using issuperset() which checks the opposite relation.

We create fset1 from a list [1, 2, 3] and check if it is a subset of fset2 using issubset().

5fill in blank

hard

Fill all three blanks to create a frozen set, add elements using union, and check the length.

Python

fset = frozenset([1])
fset = fset.[2]([3])
print(len(fset))

Drag options to blanks, or click blank then click option'

A[10, 20]

Bunion

Cfrozenset([30, 40])

Dadd

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use add which does not work on frozen sets.

Passing a list directly to union instead of a frozen set.

We start with a frozen set of [10, 20], then use union with another frozen set frozenset([30, 40]) to add elements, and finally print the length which is 4.