def update_talk_by_prompt(self, id):
presentation = self.db.get_presentation(id)
if presentation:
print "#### You have choosen to edit the following talk ###"
self.show_talk_by_id(id)
new_title = raw_input("Type the new presentation title (<ENTER> to keep old data): ")
title = new_title if len(new_title) > 0 else presentation.title
new_speaker = raw_input("Type the new presentation speaker (<ENTER> to keep old data): ")
speaker = new_speaker if len(new_speaker) > 0 else presentation.speaker
new_room = raw_input("Type the new room where the presentation will be performed (<ENTER> to keep old data): ")
room = new_room if len(new_room) > 0 else presentation.room
new_event = raw_input("Type the new event that held the presentation (<ENTER> to keep old data): ")
event = new_event if len(new_event) > 0 else presentation.event
new_presentation = Presentation("")
new_presentation.talk_id = id
new_presentation.title = title
new_presentation.speaker = speaker
new_presentation.event = event
new_presentation.room = room
self.db.update_presentation(id, new_presentation)
print "### Talk Updated! ###"
else:
print "There's no such presentation"
