text: from pkg.mod import foo
  
  try:
      pkg
  except NameError:
      print("NameError")
  try:
      pkg.mod
  except NameError:
      print("NameError")
  print(foo())
  
  # Import few times, must be same module objects
  mod_1 = __import__("pkg.mod", None, None, ("foo",))
  mod_2 = __import__("pkg.mod", None, None, ("foo",))
  print(mod_1 is mod_2)
  print(mod_1.foo is mod_2.foo)
  print(foo is mod_1.foo)
  