nuke update fbx knobs without popup message

gistfile1.py

orig_node=nuke.selectedNode()

new_filepath="/path_dir/path_to_new_file.fbx"

# save current fbx take and node name knob
fbx_take=orig_node.knob("fbx_take_name").getValue()
fbx_node=orig_node.knob("fbx_node_name").getValue()

# set knob flag NO_KNOB_CHANGED to avoid popup message
orig_node.knob("file").setFlag(0x00020000)
orig_node.knob("reload").setFlag(0x00020000)

# set new values for file path
orig_node.knob("read_from_file").setValue(True)
orig_node.knob("file").setValue(new_filepath)
orig_node.knob("reload").execute()

# remove previously set flag NO_KNOB_CHANGED
orig_node.knob("reload").clearFlag(0x00020000)
orig_node.knob("file").clearFlag(0x00020000)

# restore value of fbx take and node name knob
orig_node.knob("fbx_take_name").setValue(int(fbx_take))
orig_node.knob("fbx_node_name").setValue(int(fbx_node))

# here is the trick to force Nuke node 
# update his animation curves
orig_frame_rate=orig_node.knob("frame_rate").getValue()
orig_node.knob("frame_rate").setValue(12)
orig_node.knob("frame_rate").setValue(orig_frame_rate)