78 lines
1.9 KiB
Python
78 lines
1.9 KiB
Python
"""A simple log mechanism styled after PEP 282."""
|
|
|
|
# The class here is styled after PEP 282 so that it could later be
|
|
# replaced with a standard Python logging implementation.
|
|
|
|
DEBUG = 1
|
|
INFO = 2
|
|
WARN = 3
|
|
ERROR = 4
|
|
FATAL = 5
|
|
|
|
import sys
|
|
|
|
class Log:
|
|
|
|
def __init__(self, threshold=WARN):
|
|
self.threshold = threshold
|
|
|
|
def _log(self, level, msg, args):
|
|
if level not in (DEBUG, INFO, WARN, ERROR, FATAL):
|
|
raise ValueError('%s wrong log level' % str(level))
|
|
|
|
if level >= self.threshold:
|
|
if args:
|
|
msg = msg % args
|
|
if level in (WARN, ERROR, FATAL):
|
|
stream = sys.stderr
|
|
else:
|
|
stream = sys.stdout
|
|
try:
|
|
stream.write('%s\n' % msg)
|
|
except UnicodeEncodeError:
|
|
# emulate backslashreplace error handler
|
|
encoding = stream.encoding
|
|
msg = msg.encode(encoding, "backslashreplace").decode(encoding)
|
|
stream.write('%s\n' % msg)
|
|
stream.flush()
|
|
|
|
def log(self, level, msg, *args):
|
|
self._log(level, msg, args)
|
|
|
|
def debug(self, msg, *args):
|
|
self._log(DEBUG, msg, args)
|
|
|
|
def info(self, msg, *args):
|
|
self._log(INFO, msg, args)
|
|
|
|
def warn(self, msg, *args):
|
|
self._log(WARN, msg, args)
|
|
|
|
def error(self, msg, *args):
|
|
self._log(ERROR, msg, args)
|
|
|
|
def fatal(self, msg, *args):
|
|
self._log(FATAL, msg, args)
|
|
|
|
_global_log = Log()
|
|
log = _global_log.log
|
|
debug = _global_log.debug
|
|
info = _global_log.info
|
|
warn = _global_log.warn
|
|
error = _global_log.error
|
|
fatal = _global_log.fatal
|
|
|
|
def set_threshold(level):
|
|
# return the old threshold for use from tests
|
|
old = _global_log.threshold
|
|
_global_log.threshold = level
|
|
return old
|
|
|
|
def set_verbosity(v):
|
|
if v <= 0:
|
|
set_threshold(WARN)
|
|
elif v == 1:
|
|
set_threshold(INFO)
|
|
elif v >= 2:
|
|
set_threshold(DEBUG)
|