Python logging module not logging anything

Hi @rmorin, @JoseLuisCG,

I’m not into python but I have done some work around for the mentioned issue with logging in python.

I’m calling below script (.py file) in AA.

import logging

logging.basicConfig(
    filename='app.log',  # Log file name
    level=logging.DEBUG,  # Logging level for the file
    format='%(asctime)s %(levelname)s %(message)s'  # Log format
)
logging.info('This message should also go to the log file')
 

Code snippet is below:

Below folder is created at your .py file location. Inside the below folder compiled python file is created.

Compiled Python file:

If you open this compiled python file using Open Program file package in AA, the app.log file is generated with log information.

In location of the program/file: Provide only compiled python file name with extension (.pyc)

In start in path: Provide complete folder path till __pycache__

Hope it will help.

Thanks,

Hemantha Pindra

When troubleshooting issues with the logging module in Python, especially when it seems like the logging is not producing any output to the log file, there are a few common areas to check:

1. Logging Configuration

Ensure that your logging configuration is correctly set up. If you're not seeing any output, it's possible that the logging level is set higher than the severity of the messages being logged, or the logging destination (file handler) might not be configured correctly.

Here's a basic example of how you might configure logging to output to a file:

```python
import logging

logging.basicConfig(filename='app.log', level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(message)s')

Example usage
logging.debug('This is a debug message')
logging.info('This is an info message')
logging.warning('This is a warning message')
logging.error('This is an error message')
logging.critical('This is a critical message')
```

2. Logging Levels

Make sure that the logging level (`level=logging.DEBUG` in the example above) is set to capture the messages you are attempting to log. If you set the level to `logging.WARNING`, for instance, `logging.debug()` and `logging.info()` messages will not be logged.

3. Permissions

Check the permissions of the directory where your log file (`app.log` in the example) is supposed to be created. Ensure that the user running the Python script has write permissions to that directory.

4. Exception Handling

Wrap your logging calls in a try-except block to catch any potential exceptions that might be occurring silently:

```python
try:
    logging.debug('Attempting to log something')
except Exception as e:
    print(f"Logging failed with error: {e}")
```

5. Verify Logging Flow

Verify that your script is reaching the logging calls by placing print statements or using a debugger to ensure that the logging statements are being executed.

6. Absolute File Paths

Sometimes using relative paths for the log file (`filename='app.log'`) can cause issues depending on the current working directory of your script. Try using an absolute path (`filename='/path/to/your/app.log'`) to eliminate this as a potential problem.

Example Adjustment

If your initial attempt to log isn't working, you might try adjusting your approach to something like this:

```python
import logging

logging.basicConfig(filename='/absolute/path/to/your/app.log', level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(message)s')

def main():
    logging.debug('Debug message')
    logging.info('Info message')
    logging.warning('Warning message')
    logging.error('Error message')
    logging.critical('Critical message')

if __name__ == '__main__':
    main()
```

### Conclusion

By carefully reviewing these aspects of your logging setup, you should be able to diagnose why your logging statements are not producing any output to the log file. Ensure that the script is executing the logging commands as expected and that the configuration and permissions are correctly set up.