bundles / traitlets latest / traitlets / traitlets / List / __init__
function
traitlets.traitlets:List.__init__
source: /traitlets/traitlets.py:3620
Signature
def __init__(self, trait: list[T] | tuple[T] | set[T] | Sentinel | TraitType[T, t.Any] | None = None, default_value: list[T] | tuple[T] | set[T] | Sentinel | None = traitlets.Undefined, minlen: int = 0, maxlen: int = 9223372036854775807, **kwargs: t.Any) → NoneSummary
Create a List trait type from a list, set, or tuple.
Extended Summary
The default value is created by doing list(default_value), which creates a copy of the default_value.
trait can be specified, which restricts the type of elements in the container to that TraitType.
If only one arg is given and it is not a Trait, it is taken as default_value:
c = List([1, 2, 3])
Parameters
trait: TraitType [ optional ]the type for restricting the contents of the Container. If unspecified, types are not checked.
default_value: SequenceType [ optional ]The default value for the Trait. Must be list/tuple/set, and will be cast to the container type.
minlen: Int [ default 0 ]The minimum length of the input list
maxlen: Int [ default sys.maxsize ]The maximum length of the input list
Aliases
traitlets.List.__init__