1  """A simple log mechanism styled after PEP 282."""
       2  
       3  # The class here is styled after PEP 282 so that it could later be
       4  # replaced with a standard Python logging implementation.
       5  
       6  DEBUG = 1
       7  INFO = 2
       8  WARN = 3
       9  ERROR = 4
      10  FATAL = 5
      11  
      12  import sys
      13  
      14  class ESC[4;38;5;81mLog:
      15  
      16      def __init__(self, threshold=WARN):
      17          self.threshold = threshold
      18  
      19      def _log(self, level, msg, args):
      20          if level not in (DEBUG, INFO, WARN, ERROR, FATAL):
      21              raise ValueError('%s wrong log level' % str(level))
      22  
      23          if level >= self.threshold:
      24              if args:
      25                  msg = msg % args
      26              if level in (WARN, ERROR, FATAL):
      27                  stream = sys.stderr
      28              else:
      29                  stream = sys.stdout
      30              try:
      31                  stream.write('%s\n' % msg)
      32              except UnicodeEncodeError:
      33                  # emulate backslashreplace error handler
      34                  encoding = stream.encoding
      35                  msg = msg.encode(encoding, "backslashreplace").decode(encoding)
      36                  stream.write('%s\n' % msg)
      37              stream.flush()
      38  
      39      def log(self, level, msg, *args):
      40          self._log(level, msg, args)
      41  
      42      def debug(self, msg, *args):
      43          self._log(DEBUG, msg, args)
      44  
      45      def info(self, msg, *args):
      46          self._log(INFO, msg, args)
      47  
      48      def warn(self, msg, *args):
      49          self._log(WARN, msg, args)
      50  
      51      def error(self, msg, *args):
      52          self._log(ERROR, msg, args)
      53  
      54      def fatal(self, msg, *args):
      55          self._log(FATAL, msg, args)
      56  
      57  _global_log = Log()
      58  log = _global_log.log
      59  debug = _global_log.debug
      60  info = _global_log.info
      61  warn = _global_log.warn
      62  error = _global_log.error
      63  fatal = _global_log.fatal