整理Python中的输出以SMTPHandler记录MemoryHandler [英] Collate output in Python logging MemoryHandler with SMTPHandler

问题描述

我已将日志记录模块MemoryHandler设置为将SMTPHandler目标的调试和错误消息排队.我想要的是当过程错误包含到该点为止的所有调试语句(每行一个)时发送一封电子邮件.相反，我收到的是每条调试消息的单独电子邮件.

I have the logging module MemoryHandler set up to queue debug and error messages for the SMTPHandler target. What I want is for an email to be sent when the process errors that contains all debug statements up to that point (one per line). What I get instead is a separate email for every debug message.

这似乎是微不足道的，并且是日志记录程序包的一部分，但是我找不到关于它的任何内容，没有示例，在Google上什么也没有.

This seems like it should be trivial, and part of the logging package, but I can't find anything about it, no examples, nothing on Google.

log = logging.getLogger()
log.setLevel(logging.DEBUG)
debug_format = logging.Formatter("%(levelname)s at %(asctime)s in %(filename)s (line %(lineno)d):: %(message)s")

# write errors to email
error_mail_subject = "ERROR: Script error in %s on %s" % (sys.argv[0], os.uname()[1])
error_mail_handler = logging.handlers.SMTPHandler(SMTP_HOST, 'errors@'+os.uname()[1], [LOG_EMAIL], error_mail_subject)
error_mail_handler.setLevel(logging.ERROR)
#error_mail_handler.setLevel(logging.DEBUG)
error_mail_handler.setFormatter(debug_format)

# buffer debug messages so they can be sent with error emails
memory_handler = logging.handlers.MemoryHandler(1024*10, logging.ERROR, error_mail_handler)
memory_handler.setLevel(logging.DEBUG)

# attach handlers
log.addHandler(memory_handler)
log.addHandler(error_mail_handler)

与此相关:

如果error_mail_handler是memory_handler的目标，是否需要显式地将error_mail_handler添加到记录器? 是否应将error_mail_handler设置为DEBUG或ERROR目标?从memory_handler馈入时，它甚至还需要一个目标吗?

Do I need to add the error_mail_handler to the logger explicitly if it is a target of memory_handler anyway? Should error_mail_handler be set to DEBUG or ERROR target? Does it even need a target when it is being fed from memory_handler?

很乐意从解决此问题的任何人那里看到一些有效的代码.

Would love to see some working code from anyone who has solved this problem.

推荐答案

您可能想使用或改编通常，如果它是已添加到记录器中的MemoryHandler处理程序的目标，则无需向记录器添加处理程序.如果设置了处理程序的级别，则将影响处理程序的实际处理方式-它不会处理比其级别设置更严格的处理程序.

In general, you don't need to add a handler to a logger if it's the target of a MemoryHandler handler which has been added to a logger. If you set the level of a handler, that will affect what the handler actually processes - it won't process anything which is less severe than its level setting.

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