散景图到django视图中的图像

Question

如何将散景图转换为可从Django发送到Web客户端的图像？

这是我的views.py

from bokeh.charts import TimeSeries
def stock_chart(request):
                pdata = DataReader('GOOG',  'yahoo', datetime(2015,1,1), datetime(2015,1,15))
                xyvalues = pd.DataFrame(dict(
                        price=pdata['Adj Close'],
                        Date=pdata.index.values,
                ))

                pt = TimeSeries(xyvalues, index='Date', legend=True,
                         title=symbol , ylabel='Stock Prices', width=400, height=200)
               #fig=pt.savefig()??????????? Here i need to convert pt to an image.
               return HttpResponse(fig)


urls.py

urlpatterns = patterns('',
            url(r'^stock_chart/$', views.stock_chart, name="stock_chart"),
)

Answer 1

我建议使用bokeh.embed模块：

http://docs.bokeh.org/en/latest/docs/user_guide/embed.html#components

from bokeh.embed import components
script, div = components(pt)

然后，您只需将脚本和div插入到html模板中。

[萨拉·伯德（Sarah Bird）在Pycon的Django应用程序中嵌入散景图的演讲也很好：（https://us.pycon.org/2015/schedule/presentation/369/）

Answer 2

谢谢。可行！

in views.py

import pandas as pd
from bokeh.charts import Histogram

def stock_chart(request):
    histo_xyvalues = pd.DataFrame(dict(normal=[1, 2, 3, 1], lognormal=[5, 4, 4, 1]))
    hm = Histogram(histo_xyvalues, bins=5, title='Histogram' , width=300, height=300)
    script, div = components(hm)
    return HttpResponse(script+div)

in urls.py
...
    url(r'^stock_chart/$', views.stock_chart, name="stock_chart"),
...

a call from javascript/jQuery is,
...
$.get('/stock_chart/', function(data){
     $('#chart_area').append(data);
});


...