Python 3.x Python日志记录：自定义记录器没有输出

使用教程：， 我有以下脚本，仅包含：

import logging

# Create a custom logger
logger = logging.getLogger(__name__)

# Create handlers
c_handler = logging.StreamHandler()
f_handler = logging.FileHandler('file.log')
c_handler.setLevel(logging.INFO)
f_handler.setLevel(logging.DEBUG)

# Create formatters and add it to handlers
c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
c_handler.setFormatter(c_format)
f_handler.setFormatter(f_format)

# Add handlers to the logger
logger.addHandler(c_handler)
logger.addHandler(f_handler)

logger.debug('I am a debug msg')
logger.info('I am an info msg')

它应该将字符串写入控制台和文件（'file.log'）。 文件已创建，但bot没有内容。而且控制台也没有输出。

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有什么想法会导致这种情况，或者缺少什么吗？

您忘了为记录器本身设置详细级别：

import logging

# Create a custom logger
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG) # The logger still needs its verbose level

# Create handlers
c_handler = logging.StreamHandler()
f_handler = logging.FileHandler('file.log')
c_handler.setLevel(logging.INFO)
f_handler.setLevel(logging.DEBUG)

# Create formatters and add it to handlers
c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
c_handler.setFormatter(c_format)
f_handler.setFormatter(f_format)

# Add handlers to the logger
logger.addHandler(c_handler)
logger.addHandler(f_handler)

logger.debug('I am a debug msg')
logger.info('I am an info msg')

另外，我建议根据每个处理程序来阻止代码，而不是使用类似的语法：

import logging

# Create a custom logger
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

# Streaming Handler
c_handler = logging.StreamHandler()
c_handler.setLevel(logging.INFO)
c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
c_handler.setFormatter(c_format)
logger.addHandler(c_handler)

# File Handler
f_handler = logging.FileHandler('file.log')
f_handler.setLevel(logging.DEBUG)
f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
f_handler.setFormatter(f_format)
logger.addHandler(f_handler)

logger.debug('I am a debug msg')
logger.info('I am an info msg')

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感谢您的回复，现在一切都正常了，您的建议将处理程序分开可以提高可读性。