Branching III

In addition to running a plug-in once for every instance as in the previous example, it can sometimes be useful to define "classes" of instances that a common set of plug-ins can operate on.
Here, a "class of instances" is known as a family and a plug-in may support one or more families, which is another requirement attribute, like hosts.
import pyblish.api
​
items = ["john.person", "door.prop"]
​
class CollectInstances(pyblish.api.ContextPlugin):
  order = 0
​
  def process(self, context):
    for item in items:
      name, suffix = item.split(".")
      instance = context.create_instance(name)
      instance.data["families"] = [suffix]
​
class PrintPersons(pyblish.api.InstancePlugin):
  order = 1
  families = ["person"]
​
  def process(self, instance):
    print("Person is: %s" % instance)
​
class PrintProps(pyblish.api.InstancePlugin):
  order = 1
  families = ["prop"]
​
  def process(self, instance):
    print("The prop is: %s" % instance)
​
pyblish.api.register_plugin(CollectInstances)
pyblish.api.register_plugin(PrintPersons)
pyblish.api.register_plugin(PrintProps)
​
import pyblish.util
pyblish.util.publish()
# The person is "john"
# The prop is "door"
If you pay special attention to the final output, you can see that "john" was processed by PrintPersons, whereas "door" got processed by PrintProps.
Branching II
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Last updated 7 months ago