atom.tuple¶

class atom.tuple.Tuple(item=None, default=())[source]¶

Bases: atom.catom.Member

A member which allows tuple values.

If item validation is used, then assignment will create a copy of the original tuple before validating the items, since validation may change the item values.

__init__(item=None, default=())[source]¶

Initialize a Tuple.

Parameters :	item : Member, type, or tuple of types, optional A member to use for validating the types of items allowed in the tuple. This can also be a type object or a tuple of types, in which case it will be wrapped with an Instance member. If this is not given, no item validation is performed. default : tuple, optional The default tuple of values.