Python Coding Challenge - Question with Answer (ID 260726)

 

Explanation:

🔹 Line 1: Create a List

x = [0]

Python creates a list containing one element.

Current list:

x = [0]

Memory:

x

│

▼

[0]

🔹 Line 2: Call print()

print(x * False is [])

Before printing, Python evaluates the expression from left to right.

The expression is:

x * False is []

Python first evaluates:

x * False

🔹 Step 1: Evaluate False

In Python, bool is a subclass of int.

So:

False == 0

True == 1

Therefore,

x * False

becomes

x * 0

🔹 Step 2: Multiply the List

[0] * 0

Multiplying a list by 0 means:

"Repeat this list zero times."

So Python creates a new empty list.

Result:

[]

⚠️ This is not the original list.

Memory now:

Original List

x

│

▼

[0]

New List Created

[]

🔹 Step 3: Evaluate []

Now Python evaluates the second part:

[]

Every time Python executes:

[]

it creates another new empty list.

Memory:

First Empty List

[]

Second Empty List

[]

Although both are empty, they are different objects.

🔹 Step 4: Evaluate is

Now Python compares:

[] is []

The is operator checks:

"Are both variables pointing to the exact same object in memory?"

It does not compare values.

Memory diagram:

First List

[]

Memory Address

0x1010

-------------------

Second List

[]

Memory Address

0x2020

Different memory addresses.

Therefore,

[] is []

returns

False

🔹 Step 5: Execute print()

Now Python executes:

print(False)

Output:

False