def does_image_exist(self, parameters):
    try:
      conn = self.open_connection(parameters)
      image_id = parameters[self.PARAM_IMAGE_ID]
      conn.get_image(image_id)
      AppScaleLogger.log('Machine image {0} does exist'.format(image_id))
      return True
    except boto.exception.EC2ResponseError:
      AppScaleLogger.log('Machine image {0} does not exist'.format(image_id))
      return False
Return the size in pixels of the column indexed by col.
dataset/ETHPy150Open AppScale/appscale-tools/lib/agents/ec2_agent.py/EC2Agent.does_image_exist--crossover with--dataset/ETHPy150Open enthought/pyface/pyface/ui/wx/grid/composite_grid_model.py/CompositeGridModel.get_column_size