Getting connected shader and objects from a shader

mayaShaderNodesOperations_v01_01_20160907.py

# Written by Patrick Woo
# [email protected]

from pymel.core import *

def getShaders():
    for shEngine in ls(type='shadingEngine'):
        print 'shading engine:', shEngine
    
        for connection in [x for x in shEngine.listConnections()]:
            myType = nodeType(connection,i=True)
            if ('shadingDependNode' in myType or 'THdependNode' in myType):
                # found a shader, printing it out
                print '\t<shader> ->', connection, '(%s)'% nodeType(connection)

        for connection in sets(shEngine,q=True):
            # prints out the list of members that the shader is assigned to
            print '\t<dagNode> ->',connection, '(%s)'% nodeType(connection)
        print ''
getShaders()

mayaShaderNodesOperations_v02_01_20160907.py

# Written by Patrick Woo
# [email protected]

from pymel.core import *
'''
this is a second method, leveraging one Maya's behavior of when you select a shadingEngine node by code (python or mel)
Maya will select shape nodes in the scene that are assigned to the that shading group.
'''

for shEngine in ls(type='shadingEngine'):
    print 'shading engine:', shEngine
    for connection in sets(shEngine,q=True):
        print '\t->', connection, '(%s)' % nodeType(connection)
    print ''