How can I implement error handling and logging in my Flask app?

How can I implement error handling and logging in my Flask app?

You can use Flask's built-in error handling by defining error handlers for specific HTTP status codes. For logging, you can use Python's logging module.

Can you show me an example of how to set up a logger?

Sure! You can set up a logger like this:

import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

@app.route('/some_route')
def some_route():
    logger.info('This is an info message')
    return 'Hello, World!'

What about handling 404 errors?

You can handle 404 errors by defining a custom error handler:

@app.errorhandler(404)
def not_found(e):
    logger.error('404 error occurred')
    return 'Page not found', 404

Is there a way to log errors to a file?

Yes! You can configure the logging to write to a file by modifying the basicConfig like this:

logging.basicConfig(filename='app.log', level=logging.ERROR)