X = 1

def nester():
   X = 2                    # Hides global
   print(X)                 # Local: 2
   class C:
       X = 3                # Class local hides nester's: C.X or I.X (not scoped)
       print(X)             # Local: 3
       def method1(self):
           print(X)         # In enclosing def (not 3 in class!): 2
           print(self.X)    # Inherited class local: 3
       def method2(self):
           X = 4            # Hides enclosing (nester, not class)
           print(X)         # Local: 4
           self.X = 5       # Hides class's
           print(self.X)    # Located in instance: 5
   I = C()
   I.method1()
   I.method2()

print(X)                    # Global: 1
nester()                    # Rest: 2, 3, 2, 3, 4, 5