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PYTHON PROGRAM • LISTS

Copy a List Safely in Python

Learn copy a list safely in python with a short, executable Python example.

Beginnercopy()Mutability

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
[1, 2, 3] [1, 2, 3, 4]

COMPLETE PYTHON PROGRAM

Complete Python implementation

python-copy-list.py
Open in compiler
original = [1, 2, 3]
copy = original.copy()
copy.append(4)
print(original, copy)

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

[1, 2, 3] [1, 2, 3, 4]
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Initialize the sample values used to copy a list safely.
  2. Apply copy() and Mutability to compute the required result.
  3. Display the result for copy a list safely and compare it with the documented sample output.

This example of copy a list safely computes the result directly from the prepared sample data. It demonstrates copy() and Mutability and prints a deterministic result that can be checked against the sample output.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(n)

DEBUGGING CHECKLIST

Common mistakes

Check this

For copy a list safely, keep the data shape and value types consistent with copy().

Check this

Apply copy() in the same order shown by the algorithm; changing the order can change the result.

Check this

Verify the final copy() and Mutability result against the sample before trying new data.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.