old_contents: import argparse
  import logging
  from .dataset import Dataset, datasets
  
  
  def parse_args():
      parser = argparse.ArgumentParser(description='NYC-DB: utilities for the database of NYC housing data')
  
      # Download, Load, Verify a dataset
      parser.add_argument('--download', action='store', help='downloads file for provided dataset')
      parser.add_argument('--load', action='store', help='loads dataset into postgres')
      parser.add_argument('--verify', action='store', help='verifies a dataset by checking the table row count')
      # list and verify
      parser.add_argument('--list-datasets', action='store_true', help='lists all datasets')
      parser.add_argument('--verify-all', action='store_true', help='verifies all datasets')
      # DB CONNECTION
      parser.add_argument("-U", "--user", help="Postgres user. default: postgres", default="postgres")
      parser.add_argument("-P", "--password", help="Postgres password. default: postgres", default="postgres")
      parser.add_argument("-H", "--host", help="Postgres host: default: 127.0.0.1", default="127.0.0.1")
      parser.add_argument("-D", "--database", help="postgres database: default: postgres", default="postgres")
      parser.add_argument("--port", help="Postgres port: default: 5432", default="5432")
      # change location of data dir
      parser.add_argument("--root-dir", help="location of data directory", default="./data")
      return parser.parse_args()
  
  
  def print_datasets():
      for ds in datasets().keys():
          print(ds)
  
  
  def verify_all(args):
      for ds in datasets().keys():
          Dataset(ds, args=args).verify()
  
  
  def dispatch(args):
      if args.list_datasets:
          print_datasets()
      elif args.verify:
          Dataset(args.verify, args=args).verify()
      elif args.verify_all:
          verify_all(args)
      elif args.download:
          Dataset(args.download, args=args).download_files()
      elif args.load:
          Dataset(args.load, args=args).db_import()
  
  
  def main():
      logging.basicConfig(level=logging.DEBUG)
      args = parse_args()
      dispatch(args)
  
  
  if __name__ == '__main__':
      main()
  
new_contents: import argparse
  import logging
  from .dataset import Dataset, datasets
  
  
  def parse_args():
      parser = argparse.ArgumentParser(description='NYC-DB: utilities for the database of NYC housing data')
  
      # Download, Load, Verify a dataset
      parser.add_argument('--download', action='store', help='downloads file for provided dataset')
      parser.add_argument('--load', action='store', help='loads dataset into postgres')
      parser.add_argument('--verify', action='store', help='verifies a dataset by checking the table row count')
      # list and verify
      parser.add_argument('--list-datasets', action='store_true', help='lists all datasets')
      parser.add_argument('--verify-all', action='store_true', help='verifies all datasets')
      # DB CONNECTION
      parser.add_argument("-U", "--user", help="Postgres user. default: nycdb", default="nycdb")
      parser.add_argument("-P", "--password", help="Postgres password. default: nycdb", default="nycdb")
      parser.add_argument("-H", "--host", help="Postgres host: default: 127.0.0.1", default="127.0.0.1")
      parser.add_argument("-D", "--database", help="postgres database: default: nycdb", default="nycdb")
      parser.add_argument("--port", help="Postgres port: default: 5432", default="5432")
      # change location of data dir
      parser.add_argument("--root-dir", help="location of data directory", default="./data")
      return parser.parse_args()
  
  
  def print_datasets():
      for ds in datasets().keys():
          print(ds)
  
  
  def verify_all(args):
      for ds in datasets().keys():
          Dataset(ds, args=args).verify()
  
  
  def dispatch(args):
      if args.list_datasets:
          print_datasets()
      elif args.verify:
          Dataset(args.verify, args=args).verify()
      elif args.verify_all:
          verify_all(args)
      elif args.download:
          Dataset(args.download, args=args).download_files()
      elif args.load:
          Dataset(args.load, args=args).db_import()
  
  
  def main():
      logging.basicConfig(level=logging.DEBUG)
      args = parse_args()
      dispatch(args)
  
  
  if __name__ == '__main__':
      main()
  
subject: change default pg connection from 'postgres' to 'nycdb'