Python

Python Syslog Logging

The Python function of “Syslog logging” can make each systems logger receive a serial message from this function. When the software is in running position, the logger keeps note of functioning happenings. Here is the alternative emphasis argument in Syslog which equates to log information of sets as the main priority. Essentially, we can say that Syslog logging in Python allows the network components to connect with a logging host using a common message format. It was developed and created primarily to allow the monitoring networking devices.

A Syslog interface can be used by the systems to transmit the alert messages in a variety of distinct circumstances. The actual method of monitoring the actions taken by software for the creation, operation, and diagnosis of software logging is crucial. There are relatively few odds that we would find the source of the issue if our software fails and we don’t maintain the sufficient logging records. Certain programmers utilize the idea of publishing the sentences to check whether they were implemented separately or if an error has transpired. However, printing isn’t a smart move. For basic scripts, it might be the answer to our problems. However, the printing solution will fall short for complex programs.

How to Implement Syslog Logging in Python

An established Python programming language has a package called logging which enables publishing the status message updates to files or other outputting flows. The record may provide the details of which portion of the program is run and the issues that come up. Let us start implementing the Python code for Syslog logging where we take an example to explain it in a better way. Our code for Python starts by importing some libraries where we first import the “logging” library since we are performing the logging phenomenon in our article.

After that, we import the “logging.handlers” library for any case that could cause any error so it could deal with and sort out any exception cases for errors. The third library that we import is “SyslogHandler” from the family of “logging.handlers” to make the logging interaction with our operating system.

In the last library, we import the “Formatter” from the “logging” family of Python’s interactive file. After all the libraries, we now define a new function of the name “SYSmain” which could be called our main function of the program code. Now, we create a memory allocation of the name “Sys_logger” and assign the function of the “logging.getLogger()” function and grant it the statement of “Best Logger”. After that, we use the “Sys_logger.setLevel(logging.DEBUG)” to set up the level for the system to interact with the logging error that occurs during its logging process to deal with that.

At this step, we now create the “Sys_handler” and assign it as a “SysLogHandler()” function. Then, we provide the pathway of our system along with some interactive files that are related to login.

After we assign the system address pathway for “Syslog logging”, we use the “Sys_logger.addHandler()” function and call the “Sys_handler” function within the “Sys_logger.addHandler()” function. We create a new function and name it as “logging_format()” and assign the logging message and file name along with the level name. Now, we take the “Sys_handler.setFormatter()” function and provide the “logging_format” to the formatter function.

For the last function, we use the “Sys_logger.debug()” and grant it as the value as a statement of “My Python!!”. Then, we call off the main function using the “if” clause and return the main function in the last “SYSmain()” to undergo the logging process.

The code for the “SYSlog logging” is provided in the following in the text form for the other users to implement it by themselves:

Code:

import logging
import logging.handlers
from logging.handlers import SysLogHandler
from logging import Formatter
def SYSmain():
  Sys_logger = logging.getLogger('Best Logger')
  Sys_logger.setLevel(logging.DEBUG)
  Sys_handler = SysLogHandler(facility=SysLogHandler.LOG_DAEMON,
                              address='/Users/AqsaYasin')
  Sys_logger.addHandler(Sys_handler)
  logging_format ='[%(levelname)s]%(filename)s:%(funcName)s:%(lineno)d \
      "%(message)s"'

  Sys_handler.setFormatter(Formatter(fmt=logging_format))
  Sys_logger.debug('My Python!!')
if __name__ == '__main__':
    SYSmain()

After completing the code work, we look at the logging of the system which displays the present date of “Nov” as the month, “21” as the date, and “01:05:12” as the time of our operating system. Our system user name, “AqsaYasin”, is also provided with the Python detail of “9851” and debug the details along the “Syslog” on the main function with our statement printed on the Syslog which is “My Python!!”.

The first line of this program is similar to the one that we run earlier in Python code. It exports the formatter along with the “logging”, “handlers”, and “SysLogHandler” libraries. Now, we add the similar “SysLogHandler” that we added earlier in the code inside a “main()” function after creating a logger and setting its default level to “DEBUG”. We then write a formatter and include it with the logger. We can see how the part of the overall corporate functions by contrasting this notification with the formatting text. The string displays the “levelname”, “filename”, “funcname”, “lineno”, and “message” in the screen logging:

The message is displayed as our provided statement shows in the “syslog.py” main function,“My Python!!”, along with the “Sysmain()”function return.

Lastly, we have the “levelname” as equalized to the “DEBUG” on the log system. We can see the path, function name, and line number in the remaining parts of the message which lets us understand exactly where the log message is originated. The messaging level is indicated at the beginning of something like the letter by square brackets. The “[DEBUG]” of the textual expression of a logging message level is substituted with “[%(levelname)s]”.

Now, let us try to implement another example for the Python topic of “Syslog logging” by importing three libraries that we used in the previous examples which are “logging”, “logging.handler”, and “sys”. After getting these three libraries, we create a function of “Sys_logger” and assign the “logging.getLogger()” function. The second function of the “Sys_logger.setLevel()” function provides the “logging.INFO” command in it.

Then, we assign the logging address of our local host address which is “9238” into the new function created which is “syslogging”. We then call the “Sys_logger.addHandler()” function for exception handling cases that occurs in “syslogging”. Lastly, we use the “print()” function to display the function logging result and call off the “Sys_logger.handler” function within the “print()” function.

The second example of the “Syslog logging” that we implemented in Python is given in the following in textual form:

Code:

import logging
import logging.handlers
import sys
 Sys_logger = logging.getLogger()
Sys_logger.setLevel(logging.INFO)
syslogging = logging.handlers.SysLogHandler(address=("localhost", 9238))
Sys_logger.addHandler(syslogging)
print (Sys_logger.handlers)

When the code is completed, it returns with an output prompt message as the program finishes the statement to log off the running program. If the code stops and we want to continue it, we can start another system log. If we want to exit the console application, we press the “Enter” button and the system logs off the current application console.

Conclusion

In this article, we discussed the topic of “Syslog logging” of the Python language by implementing the code examples and necessary vital explanations. We kept two major examples for this topic according to the best of our knowledge. The first example made some debugging handling for the system log which is provided along with the details of function name and user pathway. While the second exmples used the concept of console file exiting phenomenon and pressing the “Enter” button to log the system logging.

About the author

Aqsa Yasin

I am a self-motivated information technology professional with a passion for writing. I am a technical writer and love to write for all Linux flavors and Windows.