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"""These are utilities for connecting open-source pipeline Avalon with CG-Wire using Qtazu

See: 
- https://github.com/getavalon/core
- https://github.com/Colorbleed/qtazu

References:
    - https://github.com/getavalon/docker/blob/master/volume/sync.py#L227

# How it works:

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import contextlib
import hou

def add_output_processor(ropnode, processor):
    """Add USD Output Processor to USD Rop node.

    Args:
        ropnode (hou.RopNode): The USD Rop node.
        processor (str): The output processor name. This is the basename of
            the python file that contains the Houdini USD Output Processor.

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"""Snap multiple objects by vertex index to target vertex.

1. Select all objects you want to snap
2. Add the target vertex to your selection.
3. Run script

Make sure each object has the same topological order because
this just simply snaps the same vertex number of each object
to the selected target vertex.

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"""When using maya.cmds.listRelatives with allDescendents=True it will only return the first instanced child.

Below are some example functions that correctly return all instanced children where they are "somewhat" optimized to rapidly return a result as opposed to slow recursive queries.

"""
import maya.api.OpenMaya as om
from maya import cmds
import time
import re

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import alembic

def _print_properties(property, depth=1):
    
    # Property name
    print ("\t" * depth) + property.getName()
    
    # Metadata
    metadata = property.getMetaData()
    if metadata.size():

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# Tested December 21st, 2020
# This is just a test example of how one could use the USD Api against a mayaUsdProxyShape and its USD stage.
# Note: The outliner doesn't really like it when you change the stage
#       so you might need to toggle shape display off and on to get it to update.
import mayaUsd
from maya import cmds
from pxr import Usd, UsdGeom

shape = cmds.ls(type="mayaUsdProxyShape", long=True)[0]  # make sure to use long full paths 
stage = mayaUsd.ufe.getStage('|world' + shape)

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from maya import cmds
import maya.api.OpenMaya as om
import pymel.core as pm

import maya.app.renderSetup.model.utils as utils
from maya.app.renderSetup.model import (
    override,
    selector,
    collection,
    renderLayer,

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from maya import cmds
import maya.app.renderSetup.model.initialize as init

# Get node types from Render Setup
node_types = init.renderSetupNodeNamesToShowInOutliner

display = True
for node_type in node_types:
    cmds.setNodeTypeFlag(node_type, display=display)

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import os
import contextlib

from maya import cmds
from maya.app.renderSetup.model import renderSetup

# Custom library functions, see: https://github.com/Colorbleed/colorbleed-config
from colorbleed.maya import lib
from colorbleed.lib import pairwise

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# Example on how to load latest `modelDefault` of an asset by `cbId` value using `AbcLoader` (alembic)
import avalon.io as io
import avalon.api as api
from maya import cmds

node = "my_node"
cbid = cmds.getAttr("%s.cbId" % node)

# Get asset object id from cbId
object_id = cbid.split(":", 1)[0]    # The part before the : is the asset id