Try this:
def get_last_utter_action(tracker):
##goes back through the list of events and finds
##the last utter_action
for event in reversed(tracker.events):
try:
#print("current action name is", event.get('name'))
if event.get('name') not in [ 'action_listen', None, 'utter_ask_continue' ] :
last_utter_action = event.get('name')
#print('found action', last_utter_action)
return last_utter_action
else :
#print(event.get('name'))
pass
except:
pass
#print(event.get('text'))
return 'error! no last action found'