PYTHON
Efficiently Merge Python Dictionaries
Learn modern Python 3.9+ methods to combine multiple dictionaries into a single dictionary, useful for merging configuration or request data.
dict1 = {'name': 'Alice', 'age': 30}
dict2 = {'city': 'New York', 'age': 31}
dict3 = {'occupation': 'Engineer'}
# Python 3.9+ using the union operator
merged_dict = dict1 | dict2 | dict3
print(merged_dict)
# Output: {'name': 'Alice', 'age': 31, 'city': 'New York', 'occupation': 'Engineer'}
How it works: This snippet demonstrates merging dictionaries using Python 3.9's union operator (`|`). When merging, if keys overlap, values from the rightmost dictionary take precedence. This is a concise and readable way to combine settings, request parameters, or other dictionary-based data structures in web applications, offering a cleaner syntax than older methods like `**` unpacking or `dict.update()`.