如何在LoggerAdapter实例被实例化后将上下文信息添加到其中?

下面是一个工作示例:

import logging
import logging.handlers
import sys

def main():
    logger = logging.getLogger()
    adapter = logging.LoggerAdapter(logger, extra={'foo': 'bar'})
    sh = logging.StreamHandler()
    sh.setFormatter(logging.Formatter('%(levelname)s %(message)s [%(foo)s]'))
    logger.addHandler(sh)
    adapter.warning('This is a test warning')
    adapter.extra['foo'] = 'baz'
    adapter.warning('This is another test warning')
    logger.removeHandler(sh)
    sh.close()

if __name__ == '__main__':
    sys.exit(main())

当你运行它时,它会打印出来

WARNING This is a test warning [bar]
WARNING This is another test warning [baz]

如您所见,适配器中的信息可以在实例化后更新。