Method Name:
error
Method Signature:
error(logMessage, *args, **kwargs)
Method Overview:
- error() method of logger class in the logging module of Python, writes a log message of severity logging.ERROR to the sys.stderr which is usually mapped to the console.
- Developers log with logging.ERROR to record and notify failure events during the execution of a Python Program.
- For example the events - Authentication failed, session timed out, found invalid path to a resource are all belong to error category and logged with the intention to convey the error message to the system managers and users immediately.
- Logging of an event of severity logging.ERROR does not convey that the program is behaving erroneously.
- Typically after seeing an error message users and administrators take actions like logging in to a system with right credentials after a failed attempt with wrong credentials, passing a right command-line switch to a program and so on.
Example:
|
import logging
# Get a logger with the name of current module logr = logging.getLogger(__name__)
# Verify the current log level - which is by default logging.WARNING print("Log level-numeric code:") print(logr.getEffectiveLevel())
# Set a standard log prefix formatString = '%(asctime)s %(filename)s => %(message)s' logging.basicConfig(format=formatString)
logr.warning("A sample error message") |
Output:
|
Log level-numeric code: 30 2017-03-25 12:47:34,961 logr4.py => A sample error message |