使用 structlog 设置日志级别

set log level with structlog

我正在尝试设置 structlog 并设置日志级别。我的代码如下所示:

import structlog
import logging

filepath=open("out.log",'a')

logging.basicConfig(
  level=logging.INFO
)

structlog.configure(
    processors=[structlog.stdlib.filter_by_level],
    wrapper_class=structlog.BoundLogger,
    context_class=dict,
    logger_factory=structlog.PrintLoggerFactory(filepath),
)
logger = structlog.getLogger()
logger.info('test')

这失败了:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/structlog/_base.py", line 189, in _proxy_to_logger
    args, kw = self._process_event(method_name, event, event_kw)
  File "/usr/local/lib/python3.8/site-packages/structlog/_base.py", line 149, in _process_event
    event_dict = proc(self._logger, method_name, event_dict)
  File "/usr/local/lib/python3.8/site-packages/structlog/stdlib.py", line 381, in filter_by_level
    if logger.isEnabledFor(_NAME_TO_LEVEL[name]):
AttributeError: 'PrintLogger' object has no attribute 'isEnabledFor'

好的,好的。我不应该将 PrintLogger 与 stdlib 处理器一起使用。但我想按日志级别过滤(因为日志通常是这样工作的,嗯?) 那我该怎么做呢?我假设我需要使用其他一些记录器工厂,但是哪一个? 当然 structlog.stdlib.LoggerFactory 有效,但它不会重定向到文件。

所以我说:好的,我会创建自己的过滤器:

def my_filter_by_level(logger, name, event_dict):
    if True:
        return event_dict
    else:
        raise DropEvent

...

processors=[my_filter_by_level],

当我尝试使用记录器时,我得到:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/structlog/_base.py", line 190, in _proxy_to_logger
    return getattr(self._logger, method_name)(*args, **kw)
TypeError: msg() got an unexpected keyword argument 'organization'

这来自

logger = logger.bind(**{"organization": "blah"})

但是……为什么?我的处理器出了什么问题?

好吧,我的过滤器不起作用的原因是: https://www.structlog.org/en/stable/processors.html#adapting

链中的最后一个过滤器很特殊,不能只是 return 字典。

下面的过滤器起到了作用:

def my_filter_by_level(logger, name, event_dict):
    this_level = structlog.stdlib._NAME_TO_LEVEL[name]
    set_level = structlog.stdlib._NAME_TO_LEVEL[loglevel]
    if this_level >= set_level:
        return event_dict
    else:
        raise structlog.DropEvent

这是设置默认日志级别的另一种方法。 'INFO' 以上的所有级别都将输出。

import logging
import structlog

structlog.configure(
    wrapper_class=structlog.make_filtering_bound_logger(logging.INFO),
)

log = structlog.get_logger()