Dict and Set Comprehensions

Dict Comprehension

{key: value for item in iterable}

squares = {x: x**2 for x in range(5)}
inverted = {v: k for k, v in d.items()}

Set Comprehension

{expression for item in iterable}

unique_squares = {x**2 for x in range(-3, 4)}  # {0, 1, 4, 9}

Key Points

• Dict: {k: v for ...}
• Set: {x for ...}
• Both support if conditions