Difference between reverse() and reverse_lazy() in Django

Consider these two ways of defining the success_url. The first is commented out,
the second is the function:

class NewJobCBV(LoginRequiredMixin, CreateView):
    template_name="company/job.html"
    form_class = newJobForm
    # success_url = reverse_lazy('newJob')

    def get_success_url(self, **kwargs):
        return reverse("newJob")

@CoffeeBasedLifeform : you are right, class attributes are evaluated on import, I checked after reading your answer. So,

1. If we are using success_url we have to use reverse_lazy().
2. If we are reversing inside a function we can use reverse().

Now it is crystal clear.

Thanks CoffeeBasedLifeform 🙂