Code Explanation:
🔹 1. Importing the copy Module
import copy
✅ Explanation
copy is a built-in Python module.
It provides two ways to copy objects:
copy.copy() → Shallow Copy
copy.deepcopy() → Deep Copy
Here, we use deepcopy() to create a completely independent copy.
copy Module
│
▼
┌──────────────┐
│ copy() │
│ deepcopy() │
└──────────────┘
Nothing is copied yet.
🔹 2. Creating a Nested List
a = [[1]]
✅ Explanation
A nested list is created.
Current Memory
a
│
▼
+---------+
| • |
+---------+
│
▼
+-------+
| 1 |
+-------+
Memory Representation
Outer List
│
▼
Inner List
[1]
Notice:
a stores one inner list.
The inner list is a separate object in memory.
🔹 3. Creating a Deep Copy
b = copy.deepcopy(a)
✅ Explanation
deepcopy() creates a completely new copy of every object.
It copies:
Outer list ✅
Inner list ✅
Every nested object ✅
Current Memory
a b
│ │
▼ ▼
+---------+ +---------+
| • | | • |
+---------+ +---------+
│ │
▼ ▼
+-------+ +-------+
| 1 | | 1 |
+-------+ +-------+
Notice
Both lists contain the same value.
But they point to different inner list objects.
🔹 4. Comparing Inner Lists
a[0] is b[0]
✅ Explanation
a[0]
returns
[1]
b[0]
returns
[1]
Now Python checks
a[0] is b[0]
The is operator compares memory addresses, not values.
Visual Representation
a[0]
Memory Address
0x1010
b[0]
Memory Address
0x2040
Since the addresses are different,
False
🔹 5. Printing the Result
print(a[0] is b[0])
✅ Explanation
The comparison result is printed.
Output
False
🎯 Final Output
False
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