old_contents: from ApplianceTrace import ApplianceTrace
  from ApplianceInstance import ApplianceInstance
  from ApplianceType import ApplianceType
  from ApplianceSet import ApplianceSet
  from DatasetAdapter import DatasetAdapter
  
  import sqlalchemy
  
  class PecanStreetDatasetAdapter(object):
  
      def __init__(self,db_url):
          '''
          Consider the following datapase:
          user_name = 'user'
          pw='password'
          host = "db.wiki-energy.org"
          port = "5432"
          db = "postgres"
          url = "postgresql"+"://"+user_name+":"+pw+"@"+host+":"+port+"/"+db
  
          '''
          self.eng = sqlalchemy.create_engine(db_url)
  
new_contents: from ApplianceTrace import ApplianceTrace
  from ApplianceInstance import ApplianceInstance
  from ApplianceType import ApplianceType
  from ApplianceSet import ApplianceSet
  
  import sqlalchemy
  
  class PecanStreetDatasetAdapter(object):
  
      def __init__(self,db_url):
          '''
          Consider the following datapase:
          user_name = 'user'
          pw='password'
          host = "db.wiki-energy.org"
          port = "5432"
          db = "postgres"
          url = "postgresql"+"://"+user_name+":"+pw+"@"+host+":"+port+"/"+db
  
          '''
          self.eng = sqlalchemy.create_engine(db_url)
  
subject: remove traces of datasetAdapter