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I want to use StreamHandler logging handler of python. What i have tried is,
import logging
import sys
mylogger = logging.getLogger("mylogger")
h1 = logging.StreamHandler(stream=sys.stdout)
h1.setLevel(logging.DEBUG)
mylogger.addHandler(h1)
# now trying to log with the created logger
mylogger.debug("abcd") # <no output>
mylogger.info("abcd") # <no output>
mylogger.warn("abcd") # abcd
Am i missing something ? Or doing any wrong ? Why INFO and DEBUG level logs are not coming on STDOUT ?
726
Log to stdout With the logging. basicConfig() Function in Python. If we want to print our logs to the console window and write the logs inside a file, we can use the logging. basicConfig() function for this process.
Python - Print Logs in a File. If you want to print python logs in a file rather than on the console then we can do so using the basicConfig() method by providing filename and filemode as parameter. The format of the message can be specified by using format parameter in basicConfig() method.
You should use the console. log() method to print to console JavaScript. The JavaScript console log function is mainly used for code debugging as it makes the JavaScript print the output to the console. To open the browser console, right-click on the page and select Inspect, and then click Console.
That call does not store anything. It merely creates a logger object which can be bound and configured however you would like. All warnings and errors would be logged to the standard output (that's what basicConfig does), including the calls that Freebase makes.
You have to set the level of the logger, not only the level of the handler:
mylogger.setLevel(logging.DEBUG) Here is a nice graphic of the logging workflow, where you can see that either the logger and the handler check for the log level:
http://docs.python.org/2/howto/logging.html#logging-flow
The default logLevel is WARNING, so even if you set the level of your handler to DEBUG, the message will not get through, since your logger suppresses it (it's also by default WARNING).
By the way, you can do some basic formatting with Formatter:
import logging import sys mylogger = logging.getLogger("mylogger") formatter = logging.Formatter('[%(levelname)s] %(message)s') handler = logging.StreamHandler(stream=sys.stdout) handler.setFormatter(formatter) handler.setLevel(logging.DEBUG) mylogger.addHandler(handler) mylogger.setLevel(logging.DEBUG) mylogger.debug("This is a debug message.") mylogger.info("Some info message.") mylogger.warning("A warning.") Will give you the output
[DEBUG] This is a debug message. [INFO] Some info message. [WARNING] A warning. If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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