roboto.collection_utils#

Module Contents#

class roboto.collection_utils.defaultlist(factory)#

Bases: list[T], Generic[T]

Like collections.defaultdict, but for list.

Automatically supplies a default value when you access an index that hasn’t been set or is out of bounds, without raising an IndexError.

Examples

>>> dl = defaultlist[int](factory=lambda: 0)
>>> dl[5] += 1  # Automatically extends list with 0s up to index 5
>>> print(dl)  # [0, 0, 0, 0, 0, 1]

roboto.collection_utils.get_by_path(target, key_path)#

Access a key path in a mapping. Returns None if any part of the path is not found or traverses through an object that is not a mapping.

Parameters:

Return type:

Any