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.Last modified 3yr ago