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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 cmd_screen(action, action_space, ability_id, queued, screen):
 """Do a command that needs a point on the screen."""

  action_cmd = spatial(action, action_space).unit_command
  action_cmd.ability_id = ability_id
  action_cmd.queue_command = queued
  screen.assign_to(action_cmd.target_screen_coord)