How do I deep copy lists in Python using NumPy?

In Python, you can use NumPy to create deep copies of lists efficiently. Deep copying is especially useful when you need to duplicate a list that contains other lists (or nested structures) to ensure that changes to the copied list do not affect the original list.


import numpy as np

# Original nested list
original_list = [[1, 2, 3], [4, 5, 6]]

# Deep copy using NumPy
copied_list = np.copy(original_list)

# Modify the copied list
copied_list[0][0] = 99

print("Original List:", original_list)  # Output: [[1, 2, 3], [4, 5, 6]]
print("Copied List:", copied_list)      # Output: [[99, 2, 3], [4, 5, 6]]