code: def setup(self):
      self.system = signal.lti(1.0, [1, 0, 1])
      self.t = np.arange(0, 100, 0.5)
      self.u = np.sin(2 * self.t)
  
imports: from itertools import product
  import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 1 for calling the LTI obj's underlying member method code with example usage: obj.setup() without return types