.data

Available to Instance and Context objects and used to pass data between library and plug-ins.

Introduction

Data is primarily gathered during Collection and used during subsequent plug-ins, such as Validation and Extraction. Data can also be used as a means of messaging across plug-ins.

Naming Convention

Data members are using mixedCase.

Wrong

instance.data["snake_case_is_for_python"] = True
instance.data["CamelCaseIsForClasses"] = False

Right

instance.data["myVariable"] = True
instance.data["longName"] = 42
instance.data["veryLongVariable"] = 5

The motivation is to separate between what is Python and what is Pyblish data.

Examples

import pyblish.api as pyblish
context = pyblish.Context()
context.data["myData"] = "myValue"
instance = pyblish.Instance(name="MyInstance", parent=context)
instance.data["range"] = [0, 120]
instance.data["active"] = False

Data of any type may be added, including complex objects.

# Custom objects
import pyblish.api
class MyCustomChild(object):
def __init__(self, name):
self.name = name
instance = pyblish.api.Instance(name="Car")
instance.append(MyCustomChild("wheels"))
instance.append(MyCustomChild("engine"))
MyCustomType = type("MyCustomType", (object,), {})
owner = MyCustomType()
owner.value = "John Doe"
make = MyCustomType()
make.value = "Ford"
instance.data["owner"] = owner
instance.data["make"] = make
instance.data["miles"] = "123"

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