viam.components.component_base

Attributes

ValueTypes

Exceptions

MethodNotImplementedError

Exception raised when specific methods are unimplemented.

Classes

Geometry

Geometry contains the dimensions of a given geometry and the pose of its center. The geometry is one of either a sphere or a box.

ResourceBase

The base requirements for a Resource.

ComponentBase

Base component.

Module Contents

exception viam.components.component_base.MethodNotImplementedError(method_name: str)[source]

Bases: ViamGRPCError

Exception raised when specific methods are unimplemented.

class viam.components.component_base.Geometry(*, center: global___Pose | None = ..., sphere: global___Sphere | None = ..., box: global___RectangularPrism | None = ..., capsule: global___Capsule | None = ..., label: str = ...)

Bases: google.protobuf.message.Message

Geometry contains the dimensions of a given geometry and the pose of its center. The geometry is one of either a sphere or a box.

label: str

Label of the geometry. If none supplied, will be an empty string.

property center: global___Pose

Pose of a geometries center point

property sphere: global___Sphere
property box: global___RectangularPrism
property capsule: global___Capsule
HasField(field_name: Literal['box', b'box', 'capsule', b'capsule', 'center', b'center', 'geometry_type', b'geometry_type', 'sphere', b'sphere']) bool

Checks if a certain field is set for the message.

For a oneof group, checks if any field inside is set. Note that if the field_name is not defined in the message descriptor, ValueError will be raised.

Parameters:

field_name (str) – The name of the field to check for presence.

Returns:

Whether a value has been set for the named field.

Return type:

bool

Raises:

ValueError – if the field_name is not a member of this message.

WhichOneof(oneof_group: Literal['geometry_type', b'geometry_type']) Literal['sphere', 'box', 'capsule'] | None

Returns the name of the field that is set inside a oneof group.

If no field is set, returns None.

Parameters:

oneof_group (str) – the name of the oneof group to check.

Returns:

The name of the group that is set, or None.

Return type:

str or None

Raises:

ValueError – no group with the given name exists

class viam.components.component_base.ResourceBase[source]

Bases: Protocol

The base requirements for a Resource.

SUBTYPE: ClassVar[viam.resource.types.Subtype]

The Subtype of the Resource

name: str

The name of the Resource

classmethod get_resource_name(name: str) viam.proto.common.ResourceName[source]

Get the ResourceName for this Resource with the given name

# Can be used with any resource, using an arm as an example
my_arm_name = my_arm.get_resource_name("my_arm")
Parameters:

name (str) – The name of the Resource

Returns:

The ResourceName of this Resource

Return type:

ResourceName

classmethod from_robot(robot: viam.robot.client.RobotClient, name: str) typing_extensions.Self[source]
Abstractmethod:

Get the Resource named name from the provided robot.

# Can be used with any resource, using an arm as an example
my_arm = Arm.from_robot(robot, "my_arm")
Parameters:
  • robot (RobotClient) – The robot

  • name (str) – The name of the Resource

Returns:

The Resource, if it exists on the robot

Return type:

Self

abstract do_command(command: Mapping[str, viam.utils.ValueTypes], *, timeout: float | None = None, **kwargs) Mapping[str, viam.utils.ValueTypes][source]
Async:

Send/Receive arbitrary commands to the Resource

command = {"cmd": "test", "data1": 500}
result = component.do(command)
Parameters:

command (Mapping[str, ValueTypes]) – The command to execute

Raises:

NotImplementedError – Raised if the Resource does not support arbitrary commands

Returns:

Result of the executed command

Return type:

Mapping[str, ValueTypes]

get_operation(kwargs: Mapping[str, Any]) viam.operations.Operation[source]

Get the Operation associated with the currently running function.

When writing custom resources, you should get the Operation by calling this function and check to see if it’s cancelled. If the Operation is cancelled, then you can perform any necessary (terminating long running tasks, cleaning up connections, etc. ).

Parameters:

kwargs (Mapping[str, Any]) – The kwargs object containing the operation

Returns:

The operation associated with this function

Return type:

viam.operations.Operation

async close()[source]

Safely shut down the resource and prevent further use.

Close must be idempotent. Later configuration may allow a resource to be “open” again. If a resource does not want or need a close function, it is assumed that the resource does not need to return errors when future non-Close methods are called.

await component.close()
viam.components.component_base.ValueTypes
class viam.components.component_base.ComponentBase(name: str)[source]

Bases: abc.ABC, viam.resource.base.ResourceBase

Base component. All components must inherit from this class.

SUBTYPE: ClassVar[viam.resource.types.Subtype]
classmethod from_robot(robot: viam.robot.client.RobotClient, name: str) typing_extensions.Self[source]

Get the component named name from the provided robot.

Parameters:
  • robot (RobotClient) – The robot

  • name (str) – The name of the component

Returns:

The component, if it exists on the robot

Return type:

Self

abstract do_command(command: Mapping[str, ValueTypes], *, timeout: float | None = None, **kwargs) Mapping[str, ValueTypes][source]
Async:

Send/Receive arbitrary commands to the Resource

command = {"cmd": "test", "data1": 500}
result = component.do(command)
Parameters:

command (Mapping[str, ValueTypes]) – The command to execute

Raises:

NotImplementedError – Raised if the Resource does not support arbitrary commands

Returns:

Result of the executed command

Return type:

Mapping[str, ValueTypes]

async get_geometries(*, extra: Dict[str, Any] | None = None, timeout: float | None = None) List[viam.proto.common.Geometry][source]

Get all geometries associated with the component, in their current configuration, in the frame of the component.

geometries = await component.get_geometries()

if geometries:
    # Get the center of the first geometry
    print(f"Pose of the first geometry's centerpoint: {geometries[0].center}")
Returns:

The geometries associated with the Component.

Return type:

List[Geometry]

classmethod get_resource_name(name: str) viam.proto.common.ResourceName

Get the ResourceName for this Resource with the given name

# Can be used with any resource, using an arm as an example
my_arm_name = my_arm.get_resource_name("my_arm")
Parameters:

name (str) – The name of the Resource

Returns:

The ResourceName of this Resource

Return type:

ResourceName

get_operation(kwargs: Mapping[str, Any]) viam.operations.Operation

Get the Operation associated with the currently running function.

When writing custom resources, you should get the Operation by calling this function and check to see if it’s cancelled. If the Operation is cancelled, then you can perform any necessary (terminating long running tasks, cleaning up connections, etc. ).

Parameters:

kwargs (Mapping[str, Any]) – The kwargs object containing the operation

Returns:

The operation associated with this function

Return type:

viam.operations.Operation

async close()

Safely shut down the resource and prevent further use.

Close must be idempotent. Later configuration may allow a resource to be “open” again. If a resource does not want or need a close function, it is assumed that the resource does not need to return errors when future non-Close methods are called.

await component.close()