Log Unhandled Exceptions

This package will log unhandled exceptions as a critical error.

Install

pip install unhandled-exception-logger

Usage

For use in generic python code:

from unhandled_exception_logger import unhandled_exception_setup

unhandled_exception_setup()

Flask usage

If using Flask, then you'll need to register the handle_exception function using the @app.errorhandler(Exception) decorator, otherwise Flask 500 errors won't be sent.

from unhandled_exception_logger import unhandled_exception_setup, handle_exception
import logging

unhandled_exception_setup()

app = Flask(__name__)
logging.getLogger("werkzeug").disabled = True
app.logger.disabled = True
@app.errorhandler(Exception)
def flask_handle_exception(e):
    handle_exception(sys.exc_info()[0], sys.exc_info()[1], sys.exc_info()[2])

@app.route("/")
def home():
    return "home"

If you wish to, you can pass a custom handler to these critical unhandled exceptions:

import sys
import logging
import os
from flask import Flask
from unhandled_exception_logger import (
    unhandled_exception_setup,
    handle_exception,
)

PYTHON_LOG_LEVEL = os.getenv("PYTHON_LOG_LEVEL", "DEBUG")


# Register myChstomHandler log handler
myChstomHandler = MyCustomHandler()
myChstomHandler.setLevel("CRITICAL")

unhandled_exception_setup(handler=myChstomHandler)


logger = logging.getLogger()
logger.setLevel(PYTHON_LOG_LEVEL)
logger.addHandler(myChstomHandler)


# # Direct all uncaught exceptions to handle_exception
sys.excepthook = handle_exception

# Minimal python app example with example unhandled exception
app = Flask(__name__)


@app.errorhandler(Exception)
def flask_handle_exception(e):
    handle_exception(
        sys.exc_info()[0],
        sys.exc_info()[1],
        sys.exc_info()[2],
        handler=MyCustomHandler,  # noqa: E501
    )


@app.errorhandler(500)
def error_page(e):
    return "An error occurred"

@app.route("/")
def home():
    return "home"

@app.route("/error")
def error():
    names = ["Bob", "Alice"]
    print(names[2])
    return "<p>Hello, World!</p>"

Inspired by

• Insult error