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logging.getLogger('that.module.name').setLevel(logging.INFO) For example, if you're setting your general logging level to DEBUG , but there's one very noisy module somewhere which causes a ton of superfluous output, you could suppress that selectively.
When I log an event with logging.info, it doesn't appear in the Python terminal. import logging logging.info('I am info') # no output In contrast, events logged with logging.warn do appear in the terminal. import logging logging.warn('I am warning') # outputs "I am warning"
You probably need to change the level of the logging module to allow for debug and info messages to be displayed in the console. logger.setLevel(logging.DEBUG) # this should allow all messages to be displayed if you don't want to display debug messages then do this: logger.setLevel(logging.INFO) And just a quick fyi.
You need to use placeholders in the logging string into which the parameters can be interpolated, e.g. logging.info('before: %s, current: %s', befot, curt). – deceze ♦ Commented Jun 28, 2021 at 7:24
Viewing a log showing Info and above should give a quick overview of major state changes in the process providing top-level context for understanding any warnings or errors that also occur. Don't have too many Info messages. We typically have < 5% Info messages relative to Trace.
This combination of a configurable logging level and logging statements within your program allow you full control over how your application will log its activity. In the case of log4j at least, the ordering of log levels is: DEBUG < INFO < WARN < ERROR < FATAL Here is a short example from that article demonstrating how log levels work.
• Info: informational statements concerning program state, representing program events or behavior tracking; • Warn: statements that describe potentially harmful events or states in the program; • Error: statements that describe non-fatal errors in the application; this level is used quite often for logging handled exceptions;
Then you can use log.info() or any of the other logging levels anywhere in your notebook with output that looks like this. 2020-10-28 17:07:08 [INFO] notebook - Hello world 2020-10-28 17:12:22 [INFO] notebook - More info here 2020-10-28 17:12:22 [INFO] notebook - And some more
However logging.info(dataframe.iloc[0:4]) throws: UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 87: ordinal not in range(128) Here is the output to console, works either directly to console or via print() (note the ²):
logging_test INFO : Start reading database logging_test INFO : Updating records ... logging_test INFO : Finish updating records Discussion. If you can put up with the less-than-perfect output, method 1 is the way to go. It has the advantage of being simple, least amount of effort.