MultiOutput#

class maize.core.interface.MultiOutput(*args: Any, **kwargs: Any)[source]#

Bases: MultiPort[T]

Aggregation of multiple output ports into a single port.

Index into the port to access a normal Output instance with a send method.

Parameters:

timeout – Timeout used for continuously polling the connection for free space on a potentially blocking send call.
optional – Whether this port is required for the process to stay alive. If the connection to an optional port is closed by a neighbouring process, the current node will not shutdown.
n_ports – The number of ports to instantiate, if not given will allow dynamic creation of new ports when set_channel is called
mode – Whether to 'link', 'move' or 'copy' (default) files.

name#: Unique port name

parent#: Parent node instance this port is part of

Raises:: PortException – If the port is used without a connected channel

Examples

>>> class Example(Node):
...     out = MultiOutput[int](n_ports=2)
...
...     def run(self):
...         self.out[0].send(42)
...         self.out[1].send(69)

__init__(timeout: float = 0.5, optional: bool = False, n_ports: int | None = None, mode: Literal['copy', 'link', 'move'] = 'copy') → None#

Methods

`__init__`([timeout, optional, n_ports, mode])
`build`(name, parent)	Instantiate an interface from the description.
`check`(value)	Checks if a value is valid using type annotations.
`close`()	Closes the port.
`is_connected`(port)	Specifies whether the port is connected.
`set_channel`(channel)	Set the channel associated with the port.

Attributes

`active`	Specifies whether the port is active or not.
`connected`	Specifies whether the port is connected.
`path`	Provides a unique path to the interface.
`serialized`	Provides a serialized summary of the parameter
`size`	Returns the approximate number of items waiting in the channel
`name`
`parent`
`datatype`
`doc`

property active: bool#: Specifies whether the port is active or not.

build(name: str, parent: Component) → _TInter#

Instantiate an interface from the description.

Parameters:

name – Name of the interface, will typically be the attribute name of the parent object
parent – Parent component instance

Returns:

Copy of the current instance, with references to the name and the parent

Return type:

_TInter

check(value: T) → bool#

Checks if a value is valid using type annotations.

Parameters:: value – Value to typecheck
Returns:: True if the value is valid, False otherwise
Return type:: bool

close() → None#

Closes the port.

This can be detected by neighbouring nodes waiting on the port, and subsequently cause them to shut down.

Raises:: PortException – If the port is not connected

property connected: bool#: Specifies whether the port is connected.

static is_connected(port: _PortType) → TypeGuard[_PortChannel[T]]#: Specifies whether the port is connected.

property path: tuple[str, ...]#: Provides a unique path to the interface.

property serialized: dict[str, Any]#: Provides a serialized summary of the parameter

set_channel(channel: Channel[T]) → None#

Set the channel associated with the port. This needs to be called when connecting two ports together.

Parameters:: channel – An instantiated subclass of Channel

property size: int#: Returns the approximate number of items waiting in the channel