如何在Python中禁用标准错误流的日志记录?这行不通:
import logging
logger = logging.getLogger()
logger.removeHandler(sys.stderr)
logger.warning('foobar') # emits 'foobar' on sys.stderr
如何在Python中禁用标准错误流的日志记录?这行不通:
import logging
logger = logging.getLogger()
logger.removeHandler(sys.stderr)
logger.warning('foobar') # emits 'foobar' on sys.stderr
当前回答
子类化你想要暂时禁用的处理程序:
class ToggledHandler(logging.StreamHandler):
"""A handler one can turn on and off"""
def __init__(self, args, kwargs):
super(ToggledHandler, self).__init__(*args, **kwargs)
self.enabled = True # enabled by default
def enable(self):
"""enables"""
self.enabled = True
def disable(self):
"""disables"""
self.enabled = False
def emit(self, record):
"""emits, if enabled"""
if self.enabled:
# this is taken from the super's emit, implement your own
try:
msg = self.format(record)
stream = self.stream
stream.write(msg)
stream.write(self.terminator)
self.flush()
except Exception:
self.handleError(record)
通过名称查找处理程序非常简单:
_handler = [x for x in logging.getLogger('').handlers if x.name == your_handler_name]
if len(_handler) == 1:
_handler = _handler[0]
else:
raise Exception('Expected one handler but found {}'.format(len(_handler))
一旦发现:
_handler.disable()
doStuff()
_handler.enable()
其他回答
通过更改“logging.config. log”中的一层。dictConfig”,您将能够将整个日志级别提升到一个新的级别。
logging.config.dictConfig({
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'console': {
'format': '%(name)-12s %(levelname)-8s %(message)s'
},
'file': {
'format': '%(asctime)s %(name)-12s %(levelname)-8s %(message)s'
}
},
'handlers': {
'console': {
'class': 'logging.StreamHandler',
'formatter': 'console'
},
#CHANGE below level from DEBUG to THE_LEVEL_YOU_WANT_TO_SWITCH_FOR
#if we jump from DEBUG to INFO
# we won't be able to see the DEBUG logs in our logging.log file
'file': {
'level': 'DEBUG',
'class': 'logging.FileHandler',
'formatter': 'file',
'filename': 'logging.log'
},
},
'loggers': {
'': {
'level': 'DEBUG',
'handlers': ['console', 'file'],
'propagate': False,
},
}
})
使用上下文管理器-[最简单]
import logging
class DisableLogger():
def __enter__(self):
logging.disable(logging.CRITICAL)
def __exit__(self, exit_type, exit_value, exit_traceback):
logging.disable(logging.NOTSET)
使用示例:
with DisableLogger():
do_something()
如果你需要[更复杂的]细粒度的解决方案,你可以看看AdvancedLogger
AdvancedLogger can be used for fine grained logging temporary modifications
How it works:
Modifications will be enabled when context_manager/decorator starts working and be reverted after
Usage:
AdvancedLogger can be used
- as decorator `@AdvancedLogger()`
- as context manager `with AdvancedLogger():`
It has three main functions/features:
- disable loggers and it's handlers by using disable_logger= argument
- enable/change loggers and it's handlers by using enable_logger= argument
- disable specific handlers for all loggers, by using disable_handler= argument
All features they can be used together
AdvancedLogger的用例
# Disable specific logger handler, for example for stripe logger disable console
AdvancedLogger(disable_logger={"stripe": "console"})
AdvancedLogger(disable_logger={"stripe": ["console", "console2"]})
# Enable/Set loggers
# Set level for "stripe" logger to 50
AdvancedLogger(enable_logger={"stripe": 50})
AdvancedLogger(enable_logger={"stripe": {"level": 50, "propagate": True}})
# Adjust already registered handlers
AdvancedLogger(enable_logger={"stripe": {"handlers": "console"}
使用装饰器找到了一个优雅的解决方案,它解决了以下问题:如果您正在编写一个具有多个函数的模块,每个函数都有几个调试消息,并且您希望禁用除当前关注的函数之外的所有函数的登录,该怎么办?
你可以使用装饰器:
import logging, sys
logger = logging.getLogger()
logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)
def disable_debug_messages(func):
def wrapper(*args, **kwargs):
prev_state = logger.disabled
logger.disabled = True
result = func(*args, **kwargs)
logger.disabled = prev_state
return result
return wrapper
然后,你可以这样做:
@disable_debug_messages
def function_already_debugged():
...
logger.debug("This message won't be showed because of the decorator")
...
def function_being_focused():
...
logger.debug("This message will be showed")
...
即使从function_being_focused内部调用function_already_debug,也不会显示来自function_already_debug的调试消息。 这确保您将只看到您所关注的函数的调试消息。
希望能有所帮助!
您可以更改特定处理程序的调试模式级别,而不是完全禁用它。
因此,如果你有一个情况,你想停止调试模式的控制台,但你仍然需要保持其他级别,如错误。你可以像下面这样做
# create logger
logger = logging.getLogger(__name__)
def enableConsoleDebug (debug = False):
#Set level to logging.DEBUG to see CRITICAL, ERROR, WARNING, INFO and DEBUG statements
#Set level to logging.ERROR to see the CRITICAL & ERROR statements only
logger.setLevel(logging.DEBUG)
debugLevel = logging.ERROR
if debug:
debugLevel = logging.DEBUG
for handler in logger.handlers:
if type(handler) is logging.StreamHandler:
handler.setLevel (debugLevel)
子类化你想要暂时禁用的处理程序:
class ToggledHandler(logging.StreamHandler):
"""A handler one can turn on and off"""
def __init__(self, args, kwargs):
super(ToggledHandler, self).__init__(*args, **kwargs)
self.enabled = True # enabled by default
def enable(self):
"""enables"""
self.enabled = True
def disable(self):
"""disables"""
self.enabled = False
def emit(self, record):
"""emits, if enabled"""
if self.enabled:
# this is taken from the super's emit, implement your own
try:
msg = self.format(record)
stream = self.stream
stream.write(msg)
stream.write(self.terminator)
self.flush()
except Exception:
self.handleError(record)
通过名称查找处理程序非常简单:
_handler = [x for x in logging.getLogger('').handlers if x.name == your_handler_name]
if len(_handler) == 1:
_handler = _handler[0]
else:
raise Exception('Expected one handler but found {}'.format(len(_handler))
一旦发现:
_handler.disable()
doStuff()
_handler.enable()