text: """Minimal example
  """
  
  import numpy as np
  import hydropt as ho
  
  # Define basin
  basin = ho.Basin(
      'basin_1', 
      volume=75e6, #m3 
      num_states=101, 
      levels=(1700, 1792), #m ü. M
      start_volume=60e6, #m3
  )
  
  # Define outflow
  outflow = ho.Outflow(outflow_level=1090)
  
  # Connect basin and outlow via a turbine
  turbine = ho.Turbine(
      'turbine_1', 
      max_power = 45e6, #Watt
      base_load =  1e6, #Watt
      efficiency=0.8, 
      upper_basin=basin, 
      lower_basin=outflow,
      actions=[
          ho.Standing(), 
          ho.MinPower(),
          ho.MaxPower(),
      ],
  )
  
  # Define power plant model
  power_plant = ho.PowerPlant([basin,], [turbine,]) 
  
  # Load spot prices
  spot_2019 = ho.load_spot_data()
  
  # Set optimization time frame and assign price curve
  time = spot_2019.index.to_numpy().astype('datetime64[h]')
  spot = spot_2019['Switzerland[EUR/MWh]'].to_numpy()
  
  # Compute inflow rate
  inflow_rate = 5*np.ones((len(spot),1))
  
  # Define a scenario
  underlyings = ho.Underlyings(time, spot, inflow_rate)
  scenario = ho.Scenario(power_plant, underlyings, name='base case')
  
  # Run optimization
  scenario.run()
  
  # ... wait about 30 seconds ...
  
  # Plot results
  scenario.results_.plot()