old_contents: '''Utility functions for logging configuration'''
  import sys
  import logging
  
  
  def _map_logging_verbosity(verbosity):
      '''Maps logging verbosity to logging level.
  
      Parameters
      ----------
      verbosity: int
          logging verbosity (e.g. ``2``)
  
      Returns
      -------
      int
          logging level (e.g. ``logging.INFO``)
  
      '''
      levels = (logging.ERROR, logging.WARN, logging.INFO, logging.DEBUG)
      try:
          return levels[verbosity]
      except IndexError:
          return levels[-1]
  
  
  def configure_logging(verbosity):
      '''Configures the root logger with a "stderr" stream handler that directs
      logging messages to standard error (to allow capturing program standard
      output, e.g. in order to redirect it to a file).
  
      Logging verbosity maps to levels as follows::
  
              0 -> no messages
              1 -> CRITICAL, ERROR & WARN/WARNING messages
              2 -> CRITICAL, ERROR, WARN/WARNING, & INFO messages
              3 -> CRITICAL, ERROR, WARN/WARNING, INFO & DEBUG messages
              4 -> all messages
  
      Parameters
      ----------
      verbosity: int
          logging verbosity
  
      Returns
      -------
      logging.Logger
          package root logger
  
      '''
      if verbosity > 3:
          fmt = (
              '%(asctime)s | %(levelname)-8s | %(name)-40s | '
              '%(lineno)-4s | %(message)s'
          )
      else:
          fmt = '%(asctime)s | %(levelname)-8s | %(name)-40s | %(message)s'
      datefmt = '%Y-%m-%d %H:%M:%S'
      formatter = logging.Formatter(fmt=fmt, datefmt=datefmt)
  
      stderr_handler = logging.StreamHandler(stream=sys.stderr)
      stderr_handler.name = 'stderr'
      stderr_handler.setFormatter(formatter)
  
      root_logger = logging.getLogger()
      root_logger.addHandler(stderr_handler)
      level = _map_logging_verbosity(verbosity)
      root_logger.setLevel(level)
  
      pkg_name = __name__.split('.')[0]
      pkg_logger = logging.getLogger(pkg_name)
      pkg_logger.setLevel(level)
  
      return pkg_logger
  
new_contents: '''Utility functions for logging configuration'''
  import sys
  import logging
  
  
  def _map_logging_verbosity(verbosity):
      '''Maps logging verbosity to logging level.
  
      Parameters
      ----------
      verbosity: int
          logging verbosity (e.g. ``2``)
  
      Returns
      -------
      int
          logging level (e.g. ``logging.INFO``)
  
      '''
      levels = (logging.ERROR, logging.WARN, logging.INFO, logging.DEBUG)
      try:
          return levels[verbosity]
      except IndexError:
          return levels[-1]
  
  
  def configure_logging(verbosity):
      '''Configures the root logger with a "stderr" stream handler that directs
      logging messages to standard error (to allow capturing program standard
      output, e.g. in order to redirect it to a file).
  
      Logging verbosity maps to levels as follows::
  
              0 -> no messages
              1 -> CRITICAL, ERROR & WARN/WARNING messages
              2 -> CRITICAL, ERROR, WARN/WARNING, & INFO messages
              3 -> CRITICAL, ERROR, WARN/WARNING, INFO & DEBUG messages
              4 -> all messages
  
      Parameters
      ----------
      verbosity: int
          logging verbosity
  
      Returns
      -------
      logging.Logger
          package root logger
  
      '''
      if verbosity > 3:
          fmt = (
              '%(asctime)s | %(levelname)-8s | %(name)-40s | '
              '%(lineno)-4s | %(message)s'
          )
      else:
          fmt = '%(asctime)s | %(levelname)-8s | %(name)-40s | %(message)s'
      datefmt = '%Y-%m-%d %H:%M:%S'
      formatter = logging.Formatter(fmt=fmt, datefmt=datefmt)
  
      stderr_handler = logging.StreamHandler(stream=sys.stderr)
      stderr_handler.name = 'stderr'
      stderr_handler.setFormatter(formatter)
  
      root_logger = logging.getLogger()
      root_logger.addHandler(stderr_handler)
      level = _map_logging_verbosity(verbosity)
      root_logger.setLevel(logging.ERROR)
  
      pkg_name = __name__.split('.')[0]
      pkg_logger = logging.getLogger(pkg_name)
      pkg_logger.setLevel(level)
  
      return pkg_logger
  
subject: Set level of root logger to ERROR