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python - 自定义日志级别不适用于 structlog

问题描述

我正在使用 python 自定义日志 - TRACE 是下面代码中的自定义日志级别。

使用默认记录器，它工作正常

但是当我将它更改为 structlog 时，它给出了错误。

structlog 无法识别以下代码中的 TRACE。

似乎 structlog 不支持自定义日志级别？

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

IE

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

但它不工作

    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")

标签： pythonloggingstructlog

解决方案

可以创建自定义关卡，但不是很容易。

你需要记住不仅要改变structlog.stdlib._NAME_TO_LEVEL，还要改变structlog.stdlib._LEVEL_TO_NAME。

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

此代码应该可以工作：

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')

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