all messages will be written to log file

 In the above program only WARNING and higher level messages will be written to log file.

If we set level as DEBUG then all messages will be written to log file.

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Python

1) import logging

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

3) print("Logging Module Demo")

4) logging.debug("This is debug message")

5) logging.info("This is info message")

6) logging.warning("This is warning message")

7) logging.error("This is error message")

8) logging.critical("This is critical message")

log.txt:

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1) DEBUG:root:This is debug message

2) INFO:root:This is info message