5 
<a href = "{% url 'ngraph' %}">Customer Count</a>

当我点击客户计数时，它只工作一次，为了让它工作，我必须再次运行程序，这里有什么问题？我注意到的是，一旦点击了链接 localhost:8000/graph （客户计数），它就可以工作，但会忙于 localhost:8000 并且该链接不起作用。如何解决？

视图.py

def graph(request):
    age = ['below 20', '20-22','22-24','24-26','26-28','28-30','30-40','above 40']
    avg_call_group =  [0, 0, 0, 0, 0, 0, 0, 0]

    cursor = connection.cursor()
    cursor.execute("select p.age_group,sum(c.avg_duration) as age_avg_dur from demo p,(select  card_no as card_n, avg(duration) as avg_duration from call_details where service_key = 1 and card_no =calling_no group by card_no) as c where p.card_no = c.card_n group by p.age_group ")
    numrows = int(cursor.rowcount)
    for x in range(numrows):
        row = cursor.fetchone()
        avg_call_group[x] =  row[1]

    cursor.close()

    import matplotlib.pyplot as plt
    f=plt.figure(figsize = (3,3))
    exploding = [.04, .04, .04, .04 , .04, .04, .04, .04]
    age = ['below 20', '20-22','22-24','24-26','26-28','28-30','30-40','40-50']
    plt.pie(avg_call_group, labels= age, autopct='%1.3f%%', explode = exploding)
    canvas = FigureCanvasAgg(f)
    response = HttpResponse(content_type='image/png')
    canvas.print_png(response)
    return response

网址.py

from django.conf.urls import patterns, include, url
from welcome.views import *
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^admin/', include(admin.site.urls)),
    url(r'^hello/', hello, name = 'nhello'),
    url(r'^graph/', graph, name = 'ngraph'),
)

主页.html

<div >
<a href = "{% url 'ngraph' %}">Customer Count</a>
</div>

替代源代码位置： 点击这里

4

2 回答 2

1

In the return of your views code, do a redirect. Something like:-

return render_to_response('graph.html', context_instance=RequestContext(request))
于 2013-07-02T12:30:31.407 回答
1

我不知道您是否还需要答案，但我解决了这样的确切问题：

matplotlib.use('Agg') # After you import


# And these lines at the end

fig.clf()
plt.close()
plt.clf()
del var_grid
gc.collect()
于 2013-08-09T12:40:11.230 回答