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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def select_point(action, action_space, select_point_act, screen):
 """Select a unit at a point."""

  select = spatial(action, action_space).unit_selection_point
  screen.assign_to(select.selection_screen_coord)
  select.type = select_point_act