graphs.py 文件源码

def users_graph(period):
    chart = pygal.Line(fill=True, x_label_rotation=75, show_legend=False)
    chart.title = 'Users %s' % PERIOD_VERBOSE_NAME[period]
    chart.x_labels = []
    values = []
    gen = last_days(30) if period == 'm' else last_months(12)
    users = User.objects.all()

    for m in gen:
        filter_ = time_filter_future(period, m, lambda o: o.date_joined)
        users_filtered = filter(filter_, users)
        values.append(len(list(users_filtered)))
        chart.x_labels.append('%02d/%02d' % (m.month, m.day))

    chart.add('Users', values)
    return chart.render()