code: def vacuum_state(wires, hbar=2.0):
      r"""Returns the vacuum state.
  
      Args:
          wires (int): the number of wires to initialize in the vacuum state
          hbar (float): (default 2) the value of :math:`\hbar` in the commutation
              relation :math:`[\x,\p]=i\hbar`
      Returns:
          array: the vacuum state
      """
      means = np.zeros((2 * wires))
      cov = np.identity(2 * wires) * hbar / 2
      state = [cov, means]
      return state
  
imports: import math
  import cmath
  import numpy
  from scipy.special import factorial
  import pennylane
  from pennylane.ops import Identity
  from pennylane import Device
  from .._version import __version__
label_desc: Use image node_id 13 for calling a global function with example usage: vacuum_state(wires, hbar) and returns: state