Lib/distutils/log.py

   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 Log:
  15
  16     def __init__(self, threshold=WARN):
  17         self.threshold = threshold
  18
  19     def _log(self, level, msg, args):
  20         if level >= self.threshold:
  21             if not args:
  22                 # msg may contain a '%'. If args is empty,
  23                 # don't even try to string-format
  24                 print msg
  25             else:
  26                 print msg % args
  27             sys.stdout.flush()
  28
  29     def log(self, level, msg, *args):
  30         self._log(level, msg, args)
  31
  32     def debug(self, msg, *args):
  33         self._log(DEBUG, msg, args)
  34
  35     def info(self, msg, *args):
  36         self._log(INFO, msg, args)
  37
  38     def warn(self, msg, *args):
  39         self._log(WARN, msg, args)
  40
  41     def error(self, msg, *args):
  42         self._log(ERROR, msg, args)
  43
  44     def fatal(self, msg, *args):
  45         self._log(FATAL, msg, args)
  46
  47 _global_log = Log()
  48 log = _global_log.log
  49 debug = _global_log.debug
  50 info = _global_log.info
  51 warn = _global_log.warn
  52 error = _global_log.error
  53 fatal = _global_log.fatal
  54
  55 def set_threshold(level):
  56     # return the old threshold for use from tests
  57     old = _global_log.threshold
  58     _global_log.threshold = level
  59     return old
  60
  61 def set_verbosity(v):
  62     if v <= 0:
  63         set_threshold(WARN)
  64     elif v == 1:
  65         set_threshold(INFO)
  66     elif v >= 2:
  67         set_threshold(DEBUG)