How to log a Python exception?

To log an exception in Python we can use a logging module and through that, we can log the error. The logging module provides a set of functions for simple logging and the following purposes

• DEBUG
• INFO
• WARNING
• ERROR
• CRITICAL

Log a Python Exception Examples

Example 1:

Logging an exception in Python with an error can be done in the logging.exception() method. This function logs a message with level ERROR on this logger. The arguments are interpreted as for debug(). Exception info is added to the logging message. This method should only be called from an exception handler.

Python3

# importing the module
import logging

try:
    printf("GeeksforGeeks")
except Exception as Argument:
    logging.exception("Error occurred while printing GeeksforGeeks")

Output

ERROR:root:Error occurred while printing GeeksforGeeks
Traceback (most recent call last):
  File "/home/gfg.py", line 3, in 
    printf("GeeksforGeeks")
NameError: name 'printf' is not defined

Example 2

We can also log the error message into a different file without showing error in the console by the following method:

Python3

try:
    printf("GeeksforGeeks")
except Exception as Argument:

    # creating/opening a file
    f = open("demofile2.txt", "a")

    # writing in the file
    f.write(str(Argument))

    # closing the file
    f.close()

Error message will be stored in file name demofille2.txt in same directory as code.

Output

Traceback (most recent call last):
  File "/home/gfg.py", line 5, in 
    printf("GeeksforGeeks")
NameError: name 'printf' is not defined