`traitlets.traitlets:Container.init`

source: /traitlets/traitlets.py :3409

Signature

   def     __init__ (    self    ,    trait  :  t.Any | None    =  None   ,    default_value  :  t.Any    =  traitlets.Undefined   ,    help  :  str | None    =  None   ,    read_only  :  bool | None    =  None   ,    config  :  t.Any | None    =  None   ,   ** kwargs  :  t.Any      )   →  None

Summary

Create a container 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.
allow_none : bool [ default False ]: Whether to allow the value to be None
**kwargs : any: further keys for extensions to the Trait (e.g. config)

Aliases

traitlets.Container.__init__