7 Python Dictionary Insights That Surprised Me!

1. Merge Dictionaries with Ease:

• Use the ** syntax for a quick merge:

d1 = {'a':1, 'b':2}
d2 = {'c':3, 'd':4}
d3 = {**d1, **d2}
# Output: {'a':1, 'b':2, 'c':3, 'd':4}

2. Safe Key Access with get:

• Avoid KeyError by using get:

d = {'apple':4, 'orange':5}
print(d.get('pineapple', 100)) # Output: 100

3. Updating Dictionaries:

• Combine dictionaries using update:

d1.update(d2)
# d1 now includes d2's key-value pairs

4. Class vs. Instance Dictionaries:

• Instance attributes in .__dict__, class attributes in .__dict__ as a mappingproxy.

5. Iterating Made Simple:

• Use keys(), values(), and items() for efficient iteration.

6. Efficient Dictionary Typing:

• Shortcut for creating dictionaries:

d = dict(apple=4, orange=5, pear=6)

7. Quick Dictionary Initialization:

• fromkeys for setting up default values:

fruits = ['apple', 'orange', 'pear']
d = dict.fromkeys(fruits, 5)

These insights have transformed my Python coding experience.

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