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Python Write Better Python Buggy Logs Log Messages

Brian Pitts
PLUS
Brian Pitts
Courses Plus Student 3,826 Points
Posted by Brian Pitts
Brian Pitts
Courses Plus Student 3,826 Points

logging levels and hierarchy of accessible messages

Does one set the basicConfig level to the minimum level you want messages to appear at. In other words, setting WARNING does not allow DEBUG as shown below since DEBUG appears before WARNING in the message chain. Am I understanding this correctly?

import logging

logging.basicConfig(filename='cc.log', level=logging.WARNING)

logging.debug("My logged message")
logging.warning("The French have the Grail")

cc.log:

WARNING:root:The French have the Grail

VERSUS

import logging

logging.basicConfig(filename='cc.log', level=logging.DEBUG)

logging.debug("My logged message")
logging.warning("The French have the Grail")

cc.log:

DEBUG:root:My logged message

WARNING:root:The French have the Grail

setting the level of logging seems to define which messages can be generated. Above we see that setting a WARNING level does not allow "DEBUG" to appear in the log file.

1 Answer

jcorum
jcorum
71,830 Points

Here's an excerpt from the video transcript (with timestamps):

What does level mean?
3:31
Well, level tells the logger what level to start paying attention to,
3:37
for messages, it'll ignore any messages with a lower level.
3:42
Well, what levels are available?
3:46
Well, there are six log levels and
3:47
their names make it pretty obvious what they're for.
3:49
They're critical, error, warning, info, debug, and notset.