class_docstr: A wrapper of ode for complex systems.
  
  This functions similarly as `ode`, but re-maps a complex-valued
  equation system to a real-valued one before using the integrators.
  
  Parameters
  ----------
  f : callable ``f(t, y, *f_args)``
      Rhs of the equation. t is a scalar, ``y.shape == (n,)``.
      ``f_args`` is set by calling ``set_f_params(*args)``.
  jac : callable ``jac(t, y, *jac_args)``
      Jacobian of the rhs, ``jac[i,j] = d f[i] / d y[j]``.
      ``jac_args`` is set by calling ``set_f_params(*args)``.
  
  Attributes
  ----------
  t : float
      Current time.
  y : ndarray
      Current variable values.
  
  Examples
  --------
  For usage examples, see `ode`.
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code: def y(self):
      return self._y[::2] + 1j * self._y[1::2]
  
imports: import re
  import warnings
  from numpy import asarray, array, zeros, isscalar, real, imag, vstack
  from .None import vode
  from .None import _dop
  from .None import lsoda
label_desc: Use image node_id 4 for calling the complex_ode obj's underlying member method code with example usage: obj.y() and returns: unknown