5 Advanced Tips for Python Dictionary Merging

Stop Using Loops Like a Rookie!

Have you ever encountered a situation where you needed to merge multiple Python dictionaries?

Are you still using loops to add items one by one? If so, you’re OUTDATED! Merging dictionaries in Python is not limited to using loops.

Today, I’ll teach you 5 advanced techniques to help you ditch inefficient loops and experience the elegance and simplicity of Python!

Photo by Christopher Gower on Unsplash

Technique 1: The | Operator – The New Favorite in Python 3.9+

Introduction:

Starting from Python 3.9, dictionaries support the | operator for merging. The syntax is very concise: dict1 | dict2 creates a new dictionary containing all key-value pairs from both dict1 and dict2. If the same key exists in both dictionaries, the value from dict2 will overwrite the one from dict1.

Advantages:

• Simple and intuitive
• Highly readable code

Example:

dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}

merged_dict = dict1 | dict2  # Merge dictionaries using |
print(merged_dict)  # Output: {'a': 1, 'b': 3, 'c': 4}

Note: The value of 'b'…