Add chatter box backend

pylabrobot/liquid_handling/backends/chatterbox_backend.py

@@ -0,0 +1,71 @@
+from typing import List, Union, Optional
+
+from pylabrobot.liquid_handling.backends import LiquidHandlerBackend
+from pylabrobot.liquid_handling.resources import (
+  Coordinate,
+  Plate,
+  Resource,
+  Lid,
+  Tip,
+)
+from pylabrobot.liquid_handling.standard import (
+  Aspiration,
+  Dispense
+)
+
+
+class ChatterBoxBackend(LiquidHandlerBackend):
+  """ Chatter box backend for 'How to Open Source' """
+
+  def setup(self):
+    print("Setting up the robot.")
+
+  def stop(self):
+    print("Stopping the robot.")
+
+  def __enter__(self):
+    self.setup()
+    return self
+
+  def __exit__(self, *exc):
+    self.stop()
+    return False
+
+  def assigned_resource_callback(self, resource: Resource):
+    print(f"Resource {resource.name} was assigned to the robot.")
+
+  def unassigned_resource_callback(self, name: str):
+    print(f"Resource {name} was unassigned from the robot.")
+
+  def pickup_tips(self, *channels: List[Optional[Tip]], **backend_kwargs):
+    print(f"Picking up tips {channels}.")
+
+  def discard_tips(self, *channels: List[Optional[Tip]], **backend_kwargs):
+    print(f"Discarding tips {channels}.")
+
+  def aspirate(self, *channels: Optional[Aspiration], **backend_kwargs):
+    print(f"Aspirating {channels}.")
+
+  def dispense(self, *channels: Optional[Dispense], **backend_kwargs):
+    print(f"Dispensing {channels}.")
+
+  def pickup_tips96(self, resource: Resource, **backend_kwargs):
+    print(f"Picking up tips from {resource}.")
+
+  def discard_tips96(self, resource: Resource, **backend_kwargs):
+    print(f"Discarding tips to {resource}.")
+
+  def dispense96(
+    self,
+    resource: Resource,
+    pattern: List[List[bool]],
+    volume: float,
+    **backend_kwargs
+  ):
+    print(f"Dispensing {volume} to {resource}.")
+
+  def move_plate(self, plate: Plate, to: Union[Resource, Coordinate], **backend_kwargs):
+    print(f"Moving plate {plate} to {to}.")
+
+  def move_lid(self, lid: Lid, to: Union[Resource, Coordinate], **backend_kwargs):
+    print(f"Moving lid {lid} to {to}.")