How can you create an exact copy of a dictionary in Python?

In Python, there are several ways to create a deep copy of a dictionary:

1. The copy() method of a dictionary — creates a shallow copy:

original = {'a': 1, 'b': 2}
copied = original.copy()

2. The dict() function — creates a new dictionary from an existing one:

copied = dict(original)

3. The copy module with the deepcopy() function — if the dictionary contains nested mutable objects and a deep copy is needed:

import copy
copied = copy.deepcopy(original)

If the dictionary contains only simple types (numbers, strings), then copy() or dict() is sufficient. If there are nested structures (lists, other dictionaries), and you need to copy them as well, use deepcopy().