node_list: tn.location.z is already a float, and params['z'] should not be looked up and parsed as float for every missing treenode id.
node_list: tn.location.z is already a float, and params['z']
should not be looked up and parsed as float for every missing
treenode id.

fzadow/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,htem/CATMAID