How Can I Efficiently Create Dictionaries in Python?

Creating Dictionaries with Comprehension

A dictionary can be constructed using list comprehension syntax, offering a concise approach to create dictionaries from a sequence of key-value pairs.

Using Dict Comprehension:

d = {key: value for key, value in zip(keys, values)}

Alternatives to Dict Comprehension:

• Dict Constructor:

pairs = [('a', 1), ('b', 2)]
dict(pairs)                          # → {'a': 1, 'b': 2}

• Dict Constructor with Dict Comprehension:

dict((k, v + 10) for k, v in pairs)  # → {'a': 11, 'b': 12}

• Dict Constructor with Zip:

keys = ['a', 'b']
values = [1, 2]
dict(zip(keys, values))              # → {'a': 1, 'b': 2}

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