old_contents: # coding: utf-8
  """
  Braginskii coefficients
  =========================
  
  A short example of how to calculate classical transport coefficients
  from Bragiński's theory.
  """
  
  from astropy import units as u
  from plasmapy import physics
  import matplotlib.pyplot as plt
  import numpy as np
  
  #####################################################
  # We'll use some sample ITER data, without much regard for whether
  # the regime is even fit for classical transport theory:
  
  thermal_energy_per_electron = 8.8 * u.keV
  electron_concentration = 10.1e19 / u.m**3
  
  thermal_energy_per_ion = 8.0 * u.keV
  ion_concentration = electron_concentration
  ion_particle = 'D+'  # a crude approximation
  
  ######################################################
  # We now make the default classical_transport object:
  
  braginskii = physics.transport.classical_transport(thermal_energy_per_electron,
                                                     electron_concentration,
                                                     thermal_energy_per_ion,
                                                     ion_concentration,
                                                     ion_particle)
  
  ######################################################
  # These variables are calculated during initialization and can be
  # referred to straight away:
  
  print(braginskii.coulomb_log_ei)
  print(braginskii.coulomb_log_ii)
  print(braginskii.hall_e)
  print(braginskii.hall_i)
  
  ######################################################
  # These quantities are not calculated during initialization and can be
  # referred to via methods. To signify the need to calculate them, we
  # call them via (). They could be made to act like variables via @Property,
  # but I'm not sure that's wise.
  
  print(braginskii.resistivity())
  print(braginskii.thermoelectric_conductivity())
  
new_contents: # coding: utf-8
  """
  Braginskii coefficients
  =========================
  
  A short example of how to calculate classical transport coefficients
  from Bragiński's theory.
  """
  
  from astropy import units as u
  from plasmapy.physics.transport.braginskii import classical_transport
  import matplotlib.pyplot as plt
  import numpy as np
  
  #####################################################
  # We'll use some sample ITER data, without much regard for whether
  # the regime is even fit for classical transport theory:
  
  thermal_energy_per_electron = 8.8 * u.keV
  electron_concentration = 10.1e19 / u.m**3
  
  thermal_energy_per_ion = 8.0 * u.keV
  ion_concentration = electron_concentration
  ion_particle = 'D+'  # a crude approximation
  
  ######################################################
  # We now make the default classical_transport object:
  
  braginskii = classical_transport(thermal_energy_per_electron,
                                   electron_concentration,
                                   thermal_energy_per_ion,
                                   ion_concentration,
                                   ion_particle)
  
  ######################################################
  # These variables are calculated during initialization and can be
  # referred to straight away:
  
  print(braginskii.coulomb_log_ei)
  print(braginskii.coulomb_log_ii)
  print(braginskii.hall_e)
  print(braginskii.hall_i)
  
  ######################################################
  # These quantities are not calculated during initialization and can be
  # referred to via methods. To signify the need to calculate them, we
  # call them via (). They could be made to act like variables via @Property,
  # but I'm not sure that's wise.
  
  print(braginskii.resistivity())
  print(braginskii.thermoelectric_conductivity())
  
subject: Fix import path in example