old_contents: """
  The ``wind_turbine_cluster`` module is under development and is not working yet.
  
  """
  # TODO: desciption
  
  __copyright__ = "Copyright oemof developer group"
  __license__ = "GPLv3"
  
  import numpy as np
  #from windpowerlib import wind_turbine
  
  
  class WindTurbineCluster(object):
      r"""
  
      Parameters
      ----------
      wind_farms : list
          ...
      object_name : string or None
          Name of the wind turbine cluster. Default: None.
      coordinates : list or None
          List of coordinates [lat, lon] of location for loading data.
          Default: None.
  
      Attributes
      ----------
  
      """
      def __init__(self, wind_farms, object_name=None, coordinates=None):
  
          self.object_name = object_name
          self.wind_farms = wind_farms
          self.coordinates = coordinates
  
new_contents: """
  The ``wind_turbine_cluster`` module is under development and is not working yet.
  
  """
  # TODO: desciption
  
  __copyright__ = "Copyright oemof developer group"
  __license__ = "GPLv3"
  
  import numpy as np
  #from windpowerlib import wind_turbine
  
  
  class WindTurbineCluster(object):
      r"""
  
      Parameters
      ----------
      object_name : string
          Name of the wind turbine cluster.
      wind_farms : list
          ...
      coordinates : list or None
          List of coordinates [lat, lon] of location for loading data.
          Default: None.
  
       Attributes
      ----------
      object_name : string
          Name of the wind turbine cluster.
      wind_farms : list
          ...
      coordinates : list or None
          List of coordinates [lat, lon] of location for loading data.
          Default: None.
      hub_height : float
          The calculated average hub height of the wind turbine cluster.
      installed_power : float
          The calculated installed power of the wind turbine cluster.
      power_curve : pandas.DataFrame or None
          The calculated power curve of the wind turbine cluster.
      power_output : pandas.Series
          The calculated power output of the wind turbine cluster.
  
      """
      def __init__(self, object_name, wind_farms, coordinates=None):
  
          self.object_name = object_name
          self.wind_farms = wind_farms
          self.coordinates = coordinates
  
          self.hub_height = None
          self.installed_power = None
          self.power_curve = None
          self.power_output = None
  
subject: Restructure wind turbine cluster