Identity operators (is, is not) in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if two variables refer to the same object using the identity operator.

Python

result = (a [1] b)
print(result)

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

Ais

B==

C!=

Dis not

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of 'is' to check identity.

Using '!=' or 'is not' when the question asks for identity check.

The is operator checks if two variables point to the same object in memory.

2fill in blank

medium

Complete the code to check if two variables do NOT refer to the same object using the identity operator.

Python

if x [1] y:
    print("Different objects")
else:
    print("Same object")

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

Ais

B==

C!=

Dis not

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' which checks value inequality, not identity.

Using 'is' instead of 'is not' for checking different objects.

The is not operator checks if two variables do NOT point to the same object.

3fill in blank

hard

Fix the error in the code to correctly check if two lists are the same object.

Python

list1 = [1, 2, 3]
list2 = list1
print(list1 [1] list2)

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

A==

B!=

Cis

Dis not

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which checks value equality, not identity.

Using 'is not' or '!=' which check for inequality.

To check if two variables refer to the exact same list object, use is.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that includes only items where the key is not the same object as the value and the value is None.

Python

filtered = {k: v for k, v in data.items() if k [1] v and v [2] None}

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

Ais not

Bis

C!=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of 'is not' for identity check.

Using '==' instead of 'is' to check for None.

The first blank uses is not to check keys and values are different objects. The second blank uses is to check if value is exactly None.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase keys to values only if the key is the same object as the value and the value is not None.

Python

result = {k[1]: v for k, v in items if k [2] v and v [3] None}

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

A.upper()

Bis

Cis not

D.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using '.lower()' instead of '.upper()' for keys.

Using '==' or '!=' instead of 'is' or 'is not' for identity checks.

The first blank uses .upper() to convert keys to uppercase. The second blank uses is to check identity. The third blank uses is not to ensure value is not None.