自定义日志级别不使用structlog

Question

我正在使用python自定义日志-跟踪在下面的代码中是自定义日志级别。

使用默认的记录器，它工作得很好

但是当我把它改为structlog时，它给出了错误。

结构日志无法识别以下代码中的跟踪。

看起来structlog不支持自定义日志级别？

已经尝试过https://github.com/hynek/structlog/issues/47中提到的解决方法

i.e

    structlog.stdlib.TRACE = TRACE = 5
    structlog.stdlib._NAME_TO_LEVEL['trace'] = TRACE

但是它不起作用。

    TRACE = 19


    logging.addLevelName(TRACE, "TRACE")

    logging.basicConfig(
        level=os.environ.get("LOGLEVEL", "TRACE"),
        format=os.environ.get("LOGFORMAT", '%(levelname)-8s= %(asctime)-15s = %(message)s'))



    structlog.configure(
        processors=[
            structlog.stdlib.filter_by_level,
            structlog.stdlib.add_logger_name,
            structlog.stdlib.add_log_level,
            structlog.stdlib.PositionalArgumentsFormatter(),
            structlog.processors.StackInfoRenderer(),
            structlog.processors.format_exc_info,
            structlog.processors.UnicodeDecoder(),
            structlog.stdlib.render_to_log_kwargs,
        ],
        context_class=dict,
        logger_factory=structlog.stdlib.LoggerFactory(),
        wrapper_class=structlog.stdlib.BoundLogger,
        cache_logger_on_first_use=True,
    )




    #LOG = logging.getLogger() ->> Working fine
    LOG = structlog.getLogger()



    LOG.log(TRACE, "hello") ->> error on this line
    LOG.info("testing")

Answer 1

创建自定义关卡是可能的，但不是很容易。

您需要记住不仅要更改structlog.stdlib._NAME_TO_LEVEL，还要更改structlog.stdlib._LEVEL_TO_NAME。

然后，您至少需要向structlog.stdlib._FixedFindCallerLogger添加一个trace方法(如果您还向structlog.stdlib.BoundLogger添加了一个trace方法，那么您可以调用LOG.trace，这很好)。

下面的代码应该可以工作：

import logging
import os

import structlog

TRACE = 19

structlog.stdlib.TRACE = TRACE = 5 # this overrides the 19 above with a 5, is that right?
structlog.stdlib._NAME_TO_LEVEL['trace'] = TRACE
structlog.stdlib._LEVEL_TO_NAME[TRACE] = 'trace'


def trace(self, msg, *args, **kw):
    return self.log(TRACE, msg, *args, **kw)


structlog.stdlib._FixedFindCallerLogger.trace = trace
structlog.stdlib.BoundLogger.trace = trace

logging.basicConfig(
    level=int(os.environ.get("LOGLEVEL", TRACE)),
    format=os.environ.get("LOGFORMAT", '%(levelname)-8s= %(asctime)-15s = %(message)s'))

structlog.configure(
    processors=[
        structlog.stdlib.filter_by_level,
        structlog.stdlib.add_logger_name,
        structlog.stdlib.add_log_level,
        structlog.stdlib.PositionalArgumentsFormatter(),
        structlog.processors.StackInfoRenderer(),
        structlog.processors.format_exc_info,
        structlog.processors.UnicodeDecoder(),
        structlog.stdlib.render_to_log_kwargs,
    ],
    context_class=dict,
    logger_factory=structlog.stdlib.LoggerFactory(),
    wrapper_class=structlog.stdlib.BoundLogger,
    cache_logger_on_first_use=True,
)

logging.addLevelName(TRACE, "TRACE")

LOG = structlog.getLogger()
LOG.trace('test')

Answer 2

目前还没有正式的方法，因为你可能已经从相关问题中收集到了you commented on。

你现在应该可以通过加密structlog.stdlib._NAME_TO_LEVEL来绕过这一点。