Updated super() syntax to reflect Python 3 style

main.py

@@ -8,7 +8,7 @@ class OneTimeButton(Button):
     index = NumericProperty()
 
     def __init__(self):
-        super(OneTimeButton, self).__init__()
+        super().__init__()
         self.index = OneTimeButton.count
         OneTimeButton.count += 1
 
@@ -21,7 +21,7 @@ class GuessingButton(Button):
     hidden_text = StringProperty('')
 
     def __init__(self, hidden_text):
-        super(GuessingButton, self).__init__()
+        super().__init__()
         self.hidden_text = hidden_text
 
     def on_press(self):

override.py

@@ -5,7 +5,7 @@ class Person(object):
 
 class Patient(Person):
     def __str__(self):
-        text = super(Patient, self).__str__()
+        text = super().__str__()
         return 'Patient, a specialization of {text}'.format(text=text)