Native dict operations

These dict operations have fast, optimized implementations. Other dictionary operations use generic implementations that are often slower.

Construction

Construct dict from keys and values:

• {key: value,  ...}

Construct empty dict:

• {}

• dict()

Construct dict from another object:

• dict(d: dict)

• dict(x: Iterable)

Dict comprehensions:

• {...: ... for ... in ...}

• {...: ... for ... in ... if ...}

Operators

• d[key]

• value in d

Statements

• d[key] = value

• for key in d:

Methods

• d.get(key)

• d.get(key, default)

• d.keys()

• d.values()

• d.items()

• d.copy()

• d.clear()

• d.setdefault(key)

• d.setdefault(key, value)

• d1.update(d2: dict)

• d.update(x: Iterable)

Functions

• len(d: dict)