reports.py 文件源码

def customer_yearly_usage(subscription_start, start=None, end=None):
    if start is None:
        start = subscription_start

    # regardless of start, the yearly iterator must use subscription_start
    # for the sake of enumerating.
    periods = iter_years(start=subscription_start,
                         end=end or timezone.now())

    for y, usage in enumerate(usage_for_periods(periods), 1):
        if usage['period']['end'] <= start:
            continue
        usage.update(
            labels=dict(
                year=label_year_y(y)
            ),
        )
        yield usage