code: def _to_tuple(a, b):
      return tuple(a), tuple(b)
  
imports: from math import isclose
  from sympy.core.numbers import I
  from sympy.core.symbol import Dummy
  from sympy.functions.elementary.complexes import Abs, arg
  from sympy.functions.elementary.exponential import log
  from sympy.abc import s, p, a
  from sympy.external import import_module
  from sympy.physics.control.control_plots import pole_zero_numerical_data, pole_zero_plot, step_response_numerical_data, step_response_plot, impulse_response_numerical_data, impulse_response_plot, ramp_response_numerical_data, ramp_response_plot, bode_magnitude_numerical_data, bode_phase_numerical_data, bode_plot
  from sympy.physics.control.lti import TransferFunction, Series, Parallel, TransferFunctionMatrix
  from sympy.testing.pytest import raises, skip
label_desc: Use image node_id 1 for calling a global function with example usage: _to_tuple(a, b) and returns: tuple,  tuple