Setting exc_info to True will cause the logging to include the full stack trace…. Logger.error("Fatal error in main loop", exc_info=True) Alternatively, you can use the regular logging methods- bug(), (), logger.warn(), etc.-and pass the exc_info parameter, setting it to True: while True: It will catch and log any kind of error in this way.īy default, logger.exception uses the log level of ERROR. Just notice that the first line is the message you passed to logger.exception(), and the subsequent lines are the full stack trace, including the exception type (ZeroDivisionError in this case). The details of the stack trace don’t matter-this is a toy example that illustrates a grown-up solution to a real world problem. ZeroDivisionError: integer division or modulo by zero So the multiline message that shows up in your log might look like this: Fatal error in main loop This will log the full stack trace, but prepend a line with your message. Note that you don’t have to pass the exception object here. ( logger is your application’s logger object-something that was returned from logging.getLogger(), for example.) This wonderful method captures the full stack trace in the context of the except block, and writes it in full. And rather than allow the program to terminate, you decide it’s preferable to log the error information, and continue from there. It is suitable for some code path where you know the block of code (i.e, main_loop()) can raise a number of exceptions you may not anticipate. Logger.exception("Fatal error in main loop") We’re going to start at one extreme: try: Let’s look at some ways these work together. And for software operating at scale, logging is one of the most powerful, valuable tools we have for dealing with error conditions. As I was saying: How we deal with exceptions depends on the language. Wait, I’m getting ahead of myself… we’ll come back to that. Even when writing software to help us find burritos.
And as developers, we simply have to deal with them. Aaron Maxwell is author of Powerful Python.Įxceptions happen.
0 kommentar(er)
