/Lib/distutils/log.py

 1"""A simple log mechanism styled after PEP 282."""
 2
 3# This module should be kept compatible with Python 2.1.
 4
 5# The class here is styled after PEP 282 so that it could later be
 6# replaced with a standard Python logging implementation.
 7
 8DEBUG = 1
 9INFO = 2
10WARN = 3
11ERROR = 4
12FATAL = 5
13
14import sys
15
16class Log:
17
18    def __init__(self, threshold=WARN):
19        self.threshold = threshold
20
21    def _log(self, level, msg, args):
22        if level >= self.threshold:
23            if not args:
24                # msg may contain a '%'. If args is empty,
25                # don't even try to string-format
26                print msg
27            else:
28                print msg % args
29            sys.stdout.flush()
30
31    def log(self, level, msg, *args):
32        self._log(level, msg, args)
33
34    def debug(self, msg, *args):
35        self._log(DEBUG, msg, args)
36
37    def info(self, msg, *args):
38        self._log(INFO, msg, args)
39
40    def warn(self, msg, *args):
41        self._log(WARN, msg, args)
42
43    def error(self, msg, *args):
44        self._log(ERROR, msg, args)
45
46    def fatal(self, msg, *args):
47        self._log(FATAL, msg, args)
48
49_global_log = Log()
50log = _global_log.log
51debug = _global_log.debug
52info = _global_log.info
53warn = _global_log.warn
54error = _global_log.error
55fatal = _global_log.fatal
56
57def set_threshold(level):
58    # return the old threshold for use from tests
59    old = _global_log.threshold
60    _global_log.threshold = level
61    return old
62
63def set_verbosity(v):
64    if v <= 0:
65        set_threshold(WARN)
66    elif v == 1:
67        set_threshold(INFO)
68    elif v >= 2:
69        set_threshold(DEBUG)