python (3.11.7)
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 import sys
7
8 DEBUG = 1
9 INFO = 2
10 WARN = 3
11 ERROR = 4
12 FATAL = 5
13
14
15 class ESC[4;38;5;81mLog:
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
58 _global_log = Log()
59 log = _global_log.log
60 debug = _global_log.debug
61 info = _global_log.info
62 warn = _global_log.warn
63 error = _global_log.error
64 fatal = _global_log.fatal
65
66
67 def set_threshold(level):
68 # return the old threshold for use from tests
69 old = _global_log.threshold
70 _global_log.threshold = level
71 return old
72
73
74 def set_verbosity(v):
75 if v <= 0:
76 set_threshold(WARN)
77 elif v == 1:
78 set_threshold(INFO)
79 elif v >= 2:
80 set_threshold(DEBUG)
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