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)