Sacred used the python logging module to log some basic information about the execution. It also makes it easy for you to integrate that logging with your code.
If you run the hello_world example you will see the following output:
>> python hello_world.py INFO - hello_world - Running command 'main' INFO - hello_world - Started Hello world! INFO - hello_world - Completed after 0:00:00
The lines starting with
INFO are logging outputs. They can be suppressed by
adjusting the loglevel. This can be done via the command-line like with the
>> python hello_world -l ERROR Hello world!
The specified level can be either a string or an integer:
Integrate Logging Into Your Experiment¶
If you want to make use of the logging mechanism for your own experiments the
easiest way is to use the special
_log argument in your captured functions:
@ex.capture def some_function(_log): _log.warning('My warning message!')
This will by default print a line like this:
WARNING - some_function - My warning message!
_log is a standard
for your function, as a child logger of the experiments main logger.
So it allows calls to
and some more. Check out the documentation to see what you can do with them.
Customize the Logger¶
It is easy to customize the logging behaviour of your experiment by just providing a custom Logger object to your experiment:
import logging logger = logging.getLogger('my_custom_logger') ## configure your logger here ex.logger = logger
The custom logger will be used to generate all the loggers for all
captured functions. This way you can use all the features of the
logging package. See the
examples/log_example.py file for an example of this.