import logging
import sys
import functools

logging.basicConfig(level=logging.DEBUG)

LOGGER = logging

def log_if_exception(message):
    def decorator(function):
        @functools.wraps(function)
        def exceptionwrapper(*args, **kwargs):
            try:
                return function(*args, **kwargs)
            except BaseException as e:
                LOGGER.critical(message,
                                stack_info=True,
                                extra={'exception': e,
                                       'called_function': function.__name__})
                sys.exit(1)
        return exceptionwrapper
    return decorator


@log_if_exception("Couldn't open file")
def open_the_file(filename):
    return open(filename)

@log_if_exception("File does not contain valuation_date")
def read_value(a):
    return a.read_value("valuation_date")

a = open_the_file("test.txt")
b = read_value(a)