你可以使用:

logging.basicConfig(level=your_level)

your_level是其中之一:

'debug': logging.DEBUG,
'info': logging.INFO,
'warning': logging.WARNING,
'error': logging.ERROR,
'critical': logging.CRITICAL

如果你设置your_level为logging。CRITICAL，你只会得到由以下发送的关键消息:

logging.critical('This is a critical error message')

将your_level设置为日志。DEBUG将显示所有级别的日志记录。

要了解更多详细信息，请查看日志示例。

以同样的方式更改每个Handler的级别使用Handler. setlevel()函数。

import logging
import logging.handlers

LOG_FILENAME = '/tmp/logging_rotatingfile_example.out'

# Set up a specific logger with our desired output level
my_logger = logging.getLogger('MyLogger')
my_logger.setLevel(logging.DEBUG)

# Add the log message handler to the logger
handler = logging.handlers.RotatingFileHandler(
          LOG_FILENAME, maxBytes=20, backupCount=5)

handler.setLevel(logging.CRITICAL)

my_logger.addHandler(handler)

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。

日志有以下结构:

loggers are arranged according to a namespace hierarchy with dot separators; each logger has a level (logging.WARNING by default for the root logger and logging.NOTSET by default for non-root loggers) and an effective level (the effective level of the parent logger for non-root loggers with a level logging.NOTSET and the level of the logger otherwise); each logger has a list of filters; each logger has a list of handlers; each handler has a level (logging.NOTSET by default); each handler has a list of filters.

日志记录有以下过程(由流程图表示):

因此，要禁用特定的记录器，您可以采用以下策略之一:

Set the level of the logger to logging.CRITICAL + 1. Using the main API: import logging logger = logging.getLogger("foo") logger.setLevel(logging.CRITICAL + 1) Using the config API: import logging.config logging.config.dictConfig({ "version": 1, "loggers": { "foo": { "level": logging.CRITICAL + 1 } } }) Add a filter lambda record: False to the logger. Using the main API: import logging logger = logging.getLogger("foo") logger.addFilter(lambda record: False) Using the config API: import logging.config logging.config.dictConfig({ "version": 1, "filters": { "all": { "()": lambda: (lambda record: False) } }, "loggers": { "foo": { "filters": ["all"] } } }) Remove the existing handlers of the logger, add a handler logging.NullHandler() to the logger (to prevent events from being handled by the handler logging.lastResort which is a logging.StreamHandler using the current stream sys.stderr and a level logging.WARNING) and set the attribute propagate of the logger to False (to prevent events from being handled by the handlers of the ancestor loggers of the logger). Using the main API: import logging logger = logging.getLogger("foo") for handler in logger.handlers.copy(): try: logger.removeHandler(handler) except ValueError: # in case another thread has already removed it pass logger.addHandler(logging.NullHandler()) logger.propagate = False Using the config API: import logging.config logging.config.dictConfig({ "version": 1, "handlers": { "null": { "class": "logging.NullHandler" } }, "loggers": { "foo": { "handlers": ["null"], "propagate": False } } })

警告。策略1和2只阻止记录器记录的事件被记录器的处理程序及其祖先记录器发出，策略3还阻止记录器的后代记录器记录的事件(例如logging.getLogger("foo.bar"))被记录器的处理程序及其祖先记录器发出。

请注意。—将日志记录器禁用的属性设置为True不是另一种策略，因为它不是公共API的一部分(参见https://bugs.python.org/issue36318):

import logging

logger = logging.getLogger("foo")
logger.disabled = True  # DO NOT DO THIS

考虑到您已经创建了自己的处理程序，那么在将它们添加到日志记录器之前，您可以这样做:

logger.removeHandler(logger.handlers[0])

这将删除默认的StreamHandler。 当我在Python 3.8上遇到不需要的日志发送到stderr时，这对我来说是有效的，而这些日志本应该只记录到一个文件中。

我找到了一个解决方案:

logger = logging.getLogger('my-logger')
logger.propagate = False
# now if you use logger it will not log to console.

这将防止日志被发送到包含控制台日志的上层记录器。

你还可以:

handlers = app.logger.handlers
# detach console handler
app.logger.handlers = []
# attach
app.logger.handlers = handlers