小编Jos*_*Box的帖子

我试图找到使用django的模板上下文加载器显示图像的最有效方法.我的应用程序中有一个静态目录,其中包含图像'victoryDance.gif'和项目级别的空静态根目录(带settings.py).假设我urls.py和settings.py文件中的路径是正确的.什么是最好的观点？

from django.shortcuts import HttpResponse
from django.conf import settings
from django.template import RequestContext, Template, Context

def image1(request): #  good because only the required context is rendered
    html = Template('<img src="{{ STATIC_URL }}victoryDance.gif" alt="Hi!" />')
    ctx = { 'STATIC_URL':settings.STATIC_URL}
    return HttpResponse(html.render(Context(ctx)))

def image2(request): # good because you don't have to explicitly define STATIC_URL
    html = Template('<img src="{{ STATIC_URL }}victoryDance.gif" alt="Hi!" />')
    return HttpResponse(html.render(RequestContext(request)))

def image3(request): # This allows you to load STATIC_URL selectively from the …

我有一个pandas数据帧

df = pd.DataFrame(np.random.randn(6,4),index=dates,columns=list('ABCD'))
df
     A          B           C            D
E   -0.585995   1.325598    -1.172405   -2.810322
F   -2.282079   -1.203231   -0.304155   -0.119221
G   -0.739126   1.114628    0.381701    -0.485394
H   1.162010    -1.472594   1.767941    1.450582
I   0.119481    0.097139    -0.091432   -0.415333
J   1.266389    0.875473    1.787459    -1.149971

我如何展平此数组,同时保持列和索引ID如下所示:

E A -0.585995
E B 1.325598
E C -1.172405
E D -2.810322
F A ...
F B ...
...
...
J D -1.149971

无关紧要的价值出现在......

np.flatten()可用于将df.values展平为一维数组,但后来我失去了索引和列的顺序......