simple_bottle_app_1.py

from bottle import Bottle, HTTPResponse

class CustomHttpException(BaseException):
    def __init__(self, status_code, message):
        self.status_code = status_code
        self.message = message

APP1 = Bottle()

def access_status_correctly(callback):
    def wrapper(*args, **kwargs):
        try:
            print "Before making the actual method call"
            body = callback(*args, **kwargs)
            print "After method call: Yay!"
            return body
        except CustomHttpException as exc:
            print "Correct error status code here: {}".format(exc.status_code)
            raise HTTPResponse(status=exc.status_code, body={'message': exc.message})
        except Exception:
            print "A general exception occurred"
            raise HTTPResponse(status=500)

    return wrapper

APP1.install(access_status_correctly)

@APP1.route('/error')
def error():
    raise CustomHttpException(400, "Throwing an exception here")