old_contents: """This is the docstring for the example.py module.  Modules names should
  have short, all-lowercase names.  The module name may have underscores if
  this improves readability.
  Every module should have a docstring at the very top of the file.  The
  module's docstring may extend over multiple lines.  If your docstring does
  extend over multiple lines, the closing three quotation marks must be on
  a line by itself, preferably preceded by a blank line."""
  
  __copyright__ = "tba"
  __license__ = "tba"
  __author__ = "tba"
  
  
  from egopowerflow.tools.tools import oedb_session
  from egopowerflow.tools.io import NetworkScenario
  import time
  from egopowerflow.tools.plot import plot_line_loading, plot_stacked_gen
  
  session = oedb_session()
  scenario = NetworkScenario(session, method='lopf', start_h=1, end_h=2,
                             scn_name='Status Quo')
  network = scenario.build_network()
  
  # data preparation
  network.storage_units.p_nom_extendable = True
  network.lines.s_nom = network.lines.s_nom*1.5
  network.transformers.s_nom = network.transformers.s_nom*1.5
  
  # start powerflow calculations
  x = time.time()
  network.lopf(scenario.timeindex, solver_name='gurobi')
  y = time.time()
  z = (y - x) / 60
  
  network.model.write('/home/ulf/file.lp', io_options={'symbolic_solver_labels':
                                                       True})
  
  # make a line loading plot
  plot_line_loading(network)
  
  # plot stacked sum of nominal power for each generator type and timestep
  plot_stacked_gen(network, resolution="MW")
  
  # same as before, limited to one specific bus
  plot_stacked_gen(network, bus='24560', resolution='MW')
  
  # close session
  session.close()
  
new_contents: """This is the docstring for the example.py module.  Modules names should
  have short, all-lowercase names.  The module name may have underscores if
  this improves readability.
  Every module should have a docstring at the very top of the file.  The
  module's docstring may extend over multiple lines.  If your docstring does
  extend over multiple lines, the closing three quotation marks must be on
  a line by itself, preferably preceded by a blank line."""
  
  __copyright__ = "tba"
  __license__ = "tba"
  __author__ = "tba"
  
  
  from egopowerflow.tools.tools import oedb_session
  from egopowerflow.tools.io import NetworkScenario
  import time
  from egopowerflow.tools.plot import plot_line_loading, plot_stacked_gen, add_coordinates
  
  session = oedb_session()
  # additional arguments cfgpath, version, prefix
  scenario = NetworkScenario(session, method='lopf', start_h=1, end_h=2,
                             scn_name='Status Quo')
  network = scenario.build_network()
  
  # add coordinates
  network = add_coordinates(network)
  
  # data preparation
  network.storage_units.p_nom_extendable = True
  network.lines.s_nom = network.lines.s_nom*1.5
  network.transformers.s_nom = network.transformers.s_nom*1.5
  
  # start powerflow calculations
  x = time.time()
  network.lopf(scenario.timeindex, solver_name='gurobi')
  y = time.time()
  z = (y - x) / 60
  
  network.model.write('/home/ulf/file.lp', io_options={'symbolic_solver_labels':
                                                       True})
  
  # make a line loading plot
  plot_line_loading(network)
  
  # plot stacked sum of nominal power for each generator type and timestep
  plot_stacked_gen(network, resolution="MW")
  
  # same as before, limited to one specific bus
  plot_stacked_gen(network, bus='24560', resolution='MW')
  
  # close session
  session.close()
  
subject: Use add_coordinates func