Python: Copy of a deque object and verify the shallow copying process

Last update on July 05 2025 07:25:51 (UTC/GMT +8 hours)

11. Copy a Deque and Verify Shallow Copying

Write a Python program that copies a deque object and verifies shallow copying.

Sample Solution:

Python Code:

# Import the collections module to use the deque data structure
import collections

# Create a tuple 'tup1' containing numbers 1, 3, 5, 7, and 9
tup1 = (1, 3, 5, 7, 9)

# Create a deque 'dq1' from the 'tup1' tuple
dq1 = collections.deque(tup1)

# Create a shallow copy 'dq2' of 'dq1'
dq2 = dq1.copy()

# Print a message to indicate the display of the content of 'dq1'
print("Content of dq1:")

# Print the content of 'dq1'
print(dq1)

# Print a message indicating the ID of 'dq1'
print("dq2 id:")

# Print the ID of 'dq1'
print(id(dq1))

# Print a message to indicate the display of the content of 'dq2'
print("\nContent of dq2:")

# Print the content of 'dq2'
print(dq2)

# Print a message indicating the ID of 'dq2'
print("dq2 id:")

# Print the ID of 'dq2'
print(id(dq2))

# Print a message to check if the first element of 'dq1' and 'dq2' are shallow copies
print("\nChecking the first element of dq1 and dq2 are shallow copies:")

# Print the ID of the first element of 'dq1'
print(id(dq1[0]))

# Print the ID of the first element of 'dq2'
print(id(dq2[0])) 

Sample Output:

Content of dq1:
deque([1, 3, 5, 7, 9])
dq2 id:
140706429557152

Content of dq2:
deque([1, 3, 5, 7, 9])
dq2 id:
140706406914152

Checking the first element of dq1 and dq2 are shallow copies:
11065888
11065888

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to create a shallow copy of a deque using the copy() method and compare their memory addresses.
• Write a Python program to modify a shallow copy of a deque and demonstrate that changes do not affect the original deque.
• Write a Python program to use the copy module to create a shallow copy of a deque and verify its elements are the same objects.
• Write a Python program to implement a function that returns a shallow copy of a deque and then compares the IDs of corresponding elements.

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