Make a call with your application in python3 kivy

Question

Hi does anyone know how to make a function to call a phone number using intents in kivy? Thank you in advance.

Here is an attempt of mine to do this exact thing, is it right or do I have to add something else?

from jnius import autoclass

Intent = autoclass('android.content.Intent')
Uri = autoclass('android.net.Uri')
call = None


def call_number(self):
    call = self.Intent()
    call.setAction(self.Intent.ACTION_CALL)
    call.setData(self.Uri.parse("tel:%s" % int(host_number)))
    self.startActivity(call)