def ret(meta_tree, field_name, *key_trail):
for count, key in enumerate(key_trail, start=1):
lbl = get_label_from_key(key)
if lbl == label:
target_key_trail = key_trail[:count]
return index(meta_tree, field_name, *target_key_trail)
return listify(None)
def ret(meta_tree, *key_trail):
if key_trail[-1:]:
label = labels.get_label_from_key(key_trail[-1])
return label == target_label
else:
return False