old_contents: from __future__ import absolute_import, division, unicode_literals
  
  import logging
  
  
  __version__ = '0.1'
  
  logger = logging.getLogger('api_stats')
  
  
  def main():
      pass
  
  
  if __name__ == '__main__':
      main()
  
new_contents: from __future__ import absolute_import, division, unicode_literals
  
  import argparse
  from datetime import datetime
  import json
  import locale
  import logging
  import requests
  import sys
  
  
  __version__ = '0.1'
  
  logger = logging.getLogger('api_stats')
  
  
  PY3 = sys.version_info[0] == 3
  
  if PY3:
      iteritems = dict.items
  else:
      iteritems = dict.iteritems
  
  
  class StatisticsRecorder(object):
      """Interface with the "configuration files".
      """
      def __init__(self):
          self.recorded_values = {}
  
      def record(self, key, value):
          logger.debug("record: %r = %r", key, value)
          self.recorded_values[key] = value
  
      def get_json(self, url):
          logger.info("Downloading JSON from %s", url)
          return requests.get(url).json()
  
  
  def process_configuration(data_output, configuration_file):
      """Process a configuration file and update the data.
      """
      stats = StatisticsRecorder()
  
      try:
          with open(configuration_file, 'rb') as fp:
              code = fp.read()
      except IOError as e:
          logger.critical("Cannot open configuration file: %s", e)
          sys.exit(1)
  
      env = {'stats': stats}
      if PY3:
          exec(code, env, env)
      else:
          exec('exec code in env, env')
      logger.info("Recorded %d values", len(stats.recorded_values))
  
      if data_output is None:
          logger.warning("Discarding output as requested")
          if logger.isEnabledFor(logging.DEBUG):
              logger.debug("Output was:")
              for key, value in iteritems(stats.recorded_values):
                  logger.debug("%s = %r", key, value)
      else:
          if PY3:
              fp = open(data_output, 'w', encoding='utf-8', newline='\n')
          else:
              fp = open(data_output, 'wb')
          try:
              json.dump({'format': 1,
                         'date': datetime.now().isoformat(),
                         'values': stats.recorded_values},
                        fp,
                        ensure_ascii=True,
                        indent=None,
                        sort_keys=True)
              fp.write('\n')
          finally:
              fp.close()
  
  
  def setup_logging(verbosity):
      """Sets up the logging module to log to the console.
      """
      levels = [logging.CRITICAL, logging.WARNING, logging.INFO, logging.DEBUG]
      level = levels[min(verbosity, len(levels) - 1)]
  
      # Formatter
      fmt = "%(asctime)s %(levelname)s: %(message)s"
      formatter = logging.Formatter(fmt)
  
      # Console logger
      handler = logging.StreamHandler()
      handler.setLevel(level)
      handler.setFormatter(formatter)
  
      logging.root.setLevel(level)
      logging.root.handlers = []
      logging.root.addHandler(handler)
  
  
  def main():
      """Entry point when called on the command-line.
      """
      # Locale
      locale.setlocale(locale.LC_ALL, '')
  
      parser = argparse.ArgumentParser(
          description="api_stats records the history of some data retrived "
                      "from an API")
      parser.add_argument('-v', '--verbose', action='count', default=1,
                          dest='verbosity',
                          help="augments verbosity level")
      parser.add_argument('-n', '--dry-run', action='store_true',
                          help="don't update the data on disk")
      parser.add_argument('configuration', help="configuration file to process")
      parser.add_argument('data', nargs=argparse.OPTIONAL,
                          help="file to update with the new data")
  
      args = parser.parse_args()
      if args.data is None and not args.dry_run:
          parser.error("No data file specified (or do you mean to use "
                       "--dry-run?)")
          raise RuntimeError  # unreachable
  
      setup_logging(args.verbosity)
  
      process_configuration(None if args.dry_run else args.data,
                            args.configuration)
  
  
  if __name__ == '__main__':
      main()
  
subject: Implement the functionality