message: Fix a bug in create_python_api.py
  I got an error complaining about "RuntimeError: dictionary changed size during iteration", this change fixes it.
diff: @@ -158,7 +158,7 @@ def get_api_init_text():
  # Traverse over everything imported above. Specifically,
  # we want to traverse over TensorFlow Python modules.
  - for module in sys.modules.values():
  + for module in list(sys.modules.values()):
  # Only look at tensorflow modules.
  if (not module or not hasattr(module, '__name__') or
  'tensorflow.' not in module.__name__):
  