PickleThis.py

class PickleThis:
    def __init__(self, filename, age=86400):
        self.file = filename
        self.age = age

    def __enter__(self):
        if os.path.isfile(self.file) and (time.time() - os.stat(self.file).st_mtime) < self.age:
            self.new = False
            with open(self.file, 'rb') as f:
                self.content = pickle.load(f)
                print("%s gefunden" % self.file)
        else:
            self.new = True
            self.content = False
            print("%s inexistent oder zu alt" % self.file)
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        if self.new:
            with open(self.file, 'wb') as f:
                pickle.dump(self.content, f)
                print("%s erzeugt" % self.file)


def test():
    with PickleThis('testpickle.p') as pickel:
        if not pickel.content:
            adressen = <crazy sql query>

            pickel.content = adressen
        else:
            adressen = pickel.content

    x = adressen...