text: """
  pyEPR constants and convinience definitions.
  
  @author: Zlatko Minev
  """
  # pylint: disable=invalid-name
  
  from scipy.constants import Planck, elementary_charge, epsilon_0, pi  # pylint: disable=unused-import
  
  # Pi
  π = pi
  
  # Reduced Planks constant
  ħ = hbar = Planck/(2*pi)
  
  # Reduced Flux Quantum  (3.29105976 × 10-16 Webers)
  ϕ0 = fluxQ = ħ / (2*elementary_charge)
  
  # Magnitude of the electric charge carried by a single electron
  e_el = elementary_charge
  