How do I deep copy dicts in Python for production systems?

In Python, creating a deep copy of dictionaries is essential when you want to duplicate a dictionary and all its nested objects, ensuring that the original and the copy do not share references. This is particularly important in production systems where data integrity is a priority.

To deep copy a dictionary, you can use the `copy` module which provides the `deepcopy()` function. This function recursively copies all the objects found in the original dictionary, making sure that the copy is a completely independent object.

import copy

# Original dictionary
original_dict = {
    'a': 1,
    'b': [2, 3],
    'c': {'d': 4}
}

# Creating a deep copy of the dictionary
deep_copied_dict = copy.deepcopy(original_dict)

# Modifying the deep copy
deep_copied_dict['b'][0] = 'changed'

print("Original Dictionary:", original_dict)
print("Deep Copied Dictionary:", deep_copied_dict)