Python Logger

You can use NeptuneHandler to store logs from Python's Logger as a Runs metadata.
NeptuneHandler
A Handler object that sends the log records created by the logger to which it's attached to Neptune. Logs will be stored as a StringSeries field.
Parameters
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run
(Run) - An existing run reference (as returned by neptune.init()). 
level
(int, optional, default is logging.NOTSET) - Log level of the logs to be captured by the handler. Defaults to logging.NOTSET, which captures all logs that match logger's level.
path
(str, optional, default is None) - Path to the StringSeries field used for captured logs. If None, tracked metadata will be stored inside monitoring_namespace.
Examples
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# Create a Python's Logger
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import logging
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logger = logging.getLogger("root_experiment")
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logger.setLevel(logging.DEBUG)
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​
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# Create run
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import neptune.new as neptune
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run = neptune.init(project="WORKSPACE/PROJECT")
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​
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# Create a NeptuneHandler object to capture the logs
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from neptune.new.integrations.python_logger import NeptuneHandler
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npt_handler = NeptuneHandler(run=run)
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logger.addHandler(npt_handler)
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​
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# Log something to the logger
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logger.debug("Starting data preparation")
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logger.debug("Data preparation done")
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NeptuneHandler