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
import logging
log_file = 'test.log'
info_format = '%(asctime)s - %(levelname)s - %(message)s'
logging.config.dictConfig({
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'info_format': {
'format': info_format
},
},
'handlers': {
'console': {
'level': 'INFO',
'class': 'logging.StreamHandler',
'formatter': 'info_format'
},
'info_log_file': {
'class': 'logging.handlers.RotatingFileHandler',
'level': 'INFO',
'filename': log_file,
'formatter': 'info_format'
}
},
'loggers': {
'': {
'handlers': [
'console',
'info_log_file'
],
'level': 'INFO'
}
}
})
class A:
def __init__(self):
logging.info('object created of class A')
self.logger = logging.getLogger()
self.console_handler = None
def say(self, word):
logging.info('A object says: {}'.format(word))
def disable_console_log(self):
if self.console_handler is not None:
# Console log has already been disabled
return
for handler in self.logger.handlers:
if type(handler) is logging.StreamHandler:
self.console_handler = handler
self.logger.removeHandler(handler)
def enable_console_log(self):
if self.console_handler is None:
# Console log has already been enabled
return
self.logger.addHandler(self.console_handler)
self.console_handler = None
if __name__ == '__main__':
a = A()
a.say('111')
a.disable_console_log()
a.say('222')
a.enable_console_log()
a.say('333')
控制台输出:
2018-09-15 15:22:23,354 - INFO - object created of class A
2018-09-15 15:22:23,356 - INFO - A object says: 111
2018-09-15 15:22:23,358 - INFO - A object says: 333
Test.log文件内容:
2018-09-15 15:22:23,354 - INFO - object created of class A
2018-09-15 15:22:23,356 - INFO - A object says: 111
2018-09-15 15:22:23,357 - INFO - A object says: 222
2018-09-15 15:22:23,358 - INFO - A object says: 333
其他回答
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"}
这里有一些非常好的答案，但显然没有考虑太多最简单的答案(只从无穷开始)。
root_logger = logging.getLogger()
root_logger.disabled = True
这将禁用根日志记录器，从而禁用所有其他日志记录器。 我还没有真正测试过，但它应该是最快的。
从python 2.7的日志代码中，我看到了这一点
def handle(self, record):
"""
Call the handlers for the specified record.
This method is used for unpickled records received from a socket, as
well as those created locally. Logger-level filtering is applied.
"""
if (not self.disabled) and self.filter(record):
self.callHandlers(record)
这意味着当它被禁用时，不会调用任何处理程序，并且它应该比过滤到一个非常高的值或设置一个no-op处理程序更有效。
import logging
log_file = 'test.log'
info_format = '%(asctime)s - %(levelname)s - %(message)s'
logging.config.dictConfig({
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'info_format': {
'format': info_format
},
},
'handlers': {
'console': {
'level': 'INFO',
'class': 'logging.StreamHandler',
'formatter': 'info_format'
},
'info_log_file': {
'class': 'logging.handlers.RotatingFileHandler',
'level': 'INFO',
'filename': log_file,
'formatter': 'info_format'
}
},
'loggers': {
'': {
'handlers': [
'console',
'info_log_file'
],
'level': 'INFO'
}
}
})
class A:
def __init__(self):
logging.info('object created of class A')
self.logger = logging.getLogger()
self.console_handler = None
def say(self, word):
logging.info('A object says: {}'.format(word))
def disable_console_log(self):
if self.console_handler is not None:
# Console log has already been disabled
return
for handler in self.logger.handlers:
if type(handler) is logging.StreamHandler:
self.console_handler = handler
self.logger.removeHandler(handler)
def enable_console_log(self):
if self.console_handler is None:
# Console log has already been enabled
return
self.logger.addHandler(self.console_handler)
self.console_handler = None
if __name__ == '__main__':
a = A()
a.say('111')
a.disable_console_log()
a.say('222')
a.enable_console_log()
a.say('333')
控制台输出:
2018-09-15 15:22:23,354 - INFO - object created of class A
2018-09-15 15:22:23,356 - INFO - A object says: 111
2018-09-15 15:22:23,358 - INFO - A object says: 333
Test.log文件内容:
2018-09-15 15:22:23,354 - INFO - object created of class A
2018-09-15 15:22:23,356 - INFO - A object says: 111
2018-09-15 15:22:23,357 - INFO - A object says: 222
2018-09-15 15:22:23,358 - INFO - A object says: 333
我不是很了解日志模块，但是我使用它的方式是我通常只希望禁用调试(或信息)消息。您可以使用Handler.setLevel()将日志级别设置为CRITICAL或更高。
此外，您还可以替换sys。Stderr和sys。打开用于写入的文件的标准输出。见http://docs.python.org/library/sys.html # sys.stdout。但我不建议这样做。
完全禁用日志记录:
logging.disable(sys.maxint) # Python 2
logging.disable(sys.maxsize) # Python 3
启用日志记录:
logging.disable(logging.NOTSET)
其他答案提供的工作并不能完全解决问题，例如
logging.getLogger().disabled = True
当n大于50时，
logging.disable(n)
第一个解决方案的问题是它只适用于根日志记录器。使用logging.getLogger(__name__)创建的其他记录器不会被此方法禁用。
第二个解决方案确实会影响所有日志。但是它将输出限制在给定级别之上，因此可以通过记录级别大于50的日志来覆盖它。
这可以通过
logging.disable(sys.maxint)
据我所知(在查看源代码后)，这是完全禁用日志记录的唯一方法。
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