Create a node by RPC and make linkage

createnode.py

import terragen_rpc as tg

try:
    root = tg.root()
    
    # add easy cloud
    new_cloud = tg.create_child(root, 'easy_cloud')

    # link Planet Atmosphere and easy cloud created before. 
    atmos = root.children_filtered_by_class('planet_atmosphere')[0]
    new_cloud.set_param_from_string('input_node', atmos.name())
    new_cloud.set_param_from_string('gui_group', atmos.get_param_as_string('gui_group'))

    # make the position of the added node just below right of Planet Atmosphere.
    base_pos = atmos.get_param_as_list('gui_node_pos')
    print("Base position is: " + str(base_pos))

    cloud_pos = base_pos
    cloud_pos[0] = cloud_pos[0] + 80
    cloud_pos[1] = cloud_pos[1] - 50
    new_cloud.set_param('gui_node_pos', cloud_pos)

    new_pos = new_cloud.get_param_as_list('gui_node_pos')
    print("gui_node_pos is set to: " + str(new_pos))

    # link Planet and easy cloud. 
    planet = root.children_filtered_by_class('planet')[0]
    planet.set_param_from_string('atmosphere_shader', new_cloud.name())

except ConnectionError as e:
    print("Terragen RPC connection error: " + str(e))

except TimeoutError as e:
    print("Terragen RPC timeout error: " + str(e))

except tg.ReplyError as e:
    print("Terragen RPC server reply error: " + str(e))

except tg.ApiError:
    print("Terragen RPC API error")
    raise