def a(self):
        if self.data.hour > 11:
            return _('p.m.')
        return _('a.m.')
Use a gamma prior on W (it is log concave for alpha >= 1)
dataset/ETHPy150Open django/django/django/utils/dateformat.py/TimeFormat.a--crossover with--dataset/ETHPy150Open slinderman/pyhawkes/pyhawkes/models.py/DiscreteTimeStandardHawkesModel._d_log_prior_d_W