python 记录 dictConfig 自定义格式化程序未被调用

Question

我的模块中有以下 ColoeredFormatter。

但是格式化程序没有被调用。我希望在控制台上显示 "hi"，但我得到 "This is an info of the root logger".

我已经删除了所有 .pyc 文件，但没有帮助。

MyModule/__init__.py

from MyModule.ColoredFormatter import ColoredFormatter

__all__ = ('ColoredFormatter')

MyModule/ColoredFormatter.py

import logging

class ColoredFormatter(logging.Formatter):
    def __init__(self, default):
        self.default = default

    def format(self, record):
        print("hi")
        record.msg = "hi"
        return self.default.format(record)

我的脚本

import logging, logging.config, yaml

conf="""
logging:
  version: 1
  disable_existing_loggers: true
  root:
    level: !!python/name:logging.NOTSET
    handlers: [console]
  handlers:
    console:
      class: logging.StreamHandler
      stream: ext://sys.stdout
      formatter: myFormatter
      level: !!python/name:logging.NOTSET

  formatters:
    myFormatter:
      class: !!python/name:MyModule.ColoredFormatter
"""
dict = yaml.parse(conf)
logging.config.dictConfig(dict["logging"])

logging.info("This is an info of the root logger")

Answer 1

在格式化程序部分，我不得不将 class 替换为 ()

import logging, logging.config, yaml

conf="""
logging:
  version: 1
  disable_existing_loggers: true
  root:
    level: !!python/name:logging.NOTSET
    handlers: [console]
  handlers:
    console:
      class: logging.StreamHandler
      stream: ext://sys.stdout
      formatter: myFormatter
      level: !!python/name:logging.NOTSET

  formatters:
    myFormatter:
      '()': MyModule.ColoredFormatter
"""
dict = yaml.parse(conf)
logging.config.dictConfig(dict["logging"])

logging.info("This is an info of the root logger")

Answer 2

我想补充一点，可调用对象接受 dictConfig. 中的工厂 shorthand 将自定义参数传递给构造函数是利用 lambda。

示例：

from MyModule import ColoredFormatter

...
    'formatters':
        '()': lambda: ColoredFormatter(foo='bar', ...),

python 记录 dictConfig 自定义格式化程序未被调用

python logging dictConfig custom formatter is not being called

python

logging

formatter