<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set(self, x, y, z):
 """Set x, y, and z components. Also return self. """

        self.x = x
        self.y = y
        self.z = z

        return self