[Tutor] TypeError

[Seon Kang]

When i tried to run my program, i was given this message
(this is the message in part)

file "C:Python25\lib\site-packages\livewires\games.py", line 503, in_tick
    self.position = ((self._x + self._dx), (self._y + self._dy))
TypeError: unsopported opernad type(s) for +: 'int' and type'

What is the nature of my problem?
But more specifically, what is the 'type' it's referring to?
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