[Linphone-developers] Linphone Python: Callbacks list

[talos]

First, my apologies for my bad English. In this moment I'm working in a 
linphone project using Python API. There are two pages:

https://pythonhosted.org/linphone/getting_started.html
https://wiki.linphone.org/wiki/index.php/Raspberrypi:start

In each of one are  different code's snipets or examples. My question is 
about the callback's statements:

Statement of first page:
callbacks = {
        'global_state_changed': global_state_changed,
        'registration_state_changed': registration_state_changed,
    }

Statement of second page:
callbacks = {
      'call_state_changed': self.call_state_changed,
    }

So, (maybe is a bad question) but exist's a callback list? if yes, 
where? because I can't found it. If not, how can I know the callback's 
definitions?

Again sorry for my English and thanks in advance.