mirror of https://github.com/Textualize/rich.git
71 lines
2.6 KiB
ReStructuredText
71 lines
2.6 KiB
ReStructuredText
Logging Handler
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===============
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Rich supplies a :ref:`logging handler<logging>` which will format and colorize text written by Python's logging module.
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Here's an example of how to set up a rich logger::
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import logging
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from rich.logging import RichHandler
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FORMAT = "%(message)s"
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logging.basicConfig(
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level="NOTSET", format=FORMAT, datefmt="[%X]", handlers=[RichHandler()]
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)
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log = logging.getLogger("rich")
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log.info("Hello, World!")
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Rich logs won't render :ref:`console_markup` in logging by default as most libraries won't be aware of the need to escape literal square brackets, but you can enable it by setting ``markup=True`` on the handler. Alternatively you can enable it per log message by supplying the ``extra`` argument as follows::
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log.error("[bold red blink]Server is shutting down![/]", extra={"markup": True})
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Similarly, the highlighter may be overridden per log message::
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log.error("123 will not be highlighted", extra={"highlighter": None})
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Handle exceptions
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-------------------
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The :class:`~rich.logging.RichHandler` class may be configured to use Rich's :class:`~rich.traceback.Traceback` class to format exceptions, which provides more context than a built-in exception. To get beautiful exceptions in your logs set ``rich_tracebacks=True`` on the handler constructor::
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import logging
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from rich.logging import RichHandler
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logging.basicConfig(
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level="NOTSET",
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format="%(message)s",
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datefmt="[%X]",
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handlers=[RichHandler(rich_tracebacks=True)]
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)
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log = logging.getLogger("rich")
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try:
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print(1 / 0)
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except Exception:
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log.exception("unable print!")
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There are a number of other options you can use to configure logging output, see the :class:`~rich.logging.RichHandler` reference for details.
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Suppressing Frames
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------------------
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If you are working with a framework (click, django etc), you may only be interested in seeing the code from your own application within the traceback. You can exclude framework code by setting the `suppress` argument on `Traceback`, `install`, and `Console.print_exception`, which should be a list of modules or str paths.
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Here's how you would exclude `click <https://click.palletsprojects.com/en/8.0.x/>`_ from Rich exceptions::
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import click
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import logging
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from rich.logging import RichHandler
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logging.basicConfig(
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level="NOTSET",
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format="%(message)s",
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datefmt="[%X]",
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handlers=[RichHandler(rich_tracebacks=True, tracebacks_suppress=[click])]
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)
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Suppressed frames will show the line and file only, without any code. |