PYTHON
Merge Multiple Dictionaries into One
Combine several Python dictionaries into a single dictionary using the union operator (|) for Python 3.9+ or the `**` unpacking operator for older versions, ideal for consolidating configurations or data.
dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}
dict3 = {'d': 5}
# Python 3.9+ (Recommended)
merged_dict_39 = dict1 | dict2 | dict3
# Python < 3.9 (Also works in 3.9+)
merged_dict_old = {**dict1, **dict2, **dict3}
# Result for both:
# {'a': 1, 'b': 3, 'c': 4, 'd': 5}
How it works: This code demonstrates two ways to merge multiple dictionaries. For Python 3.9 and newer, the `|` (union) operator provides a clean and readable way to combine dictionaries. For older Python versions, or as an alternative, the `**` unpacking operator can be used inside a new dictionary literal. In both methods, if keys conflict, the value from the rightmost (or latest) dictionary takes precedence.