Question

我是Django的新手，我正在尝试在视图中显示matplotlib图像和一些数据。 matplotlib是在不同的python文件中创建的。

这是matplotlib代码：

import matplotlib.pyplot as plt
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
import numpy as np
from django.http import HttpResponse, HttpResponseRedirect


def plot_playoutcomes(playdata):

    fig = Figure()
    canvas = FigureCanvas(fig)
    ax = fig.add_subplot(111)
    x = np.arange(-2,1.5,.01)
    y = np.sin(np.exp(2*x))
    ax.plot(x, y)
    response = HttpResponse(content_type='image/png')
    canvas.print_png(response)
    return response

它生成一个简单的图形。这是views.py：

def getinput(request):
     if request.method == 'POST':
         form = get_data(request.POST)

         if form.is_valid():
             down = form.cleaned_data['get_down']
             ytg = form.cleaned_data['get_ytg']
             yfog = form.cleaned_data['get_yfog']
             map_data = next_play.objects.filter(last_dwn__exact=down, last_yfog__exact=yfog, last_ytg__exact=ytg)
             fig = plot_playoutcomes(map_data)
             context = {'form': form, 'query_data': map_data, 'img': fig}
             return render(request, 'play_outcomes/output.html', context)
     else:
         form = get_data()

     return render(request, 'play_outcomes/getinput.html', {'form': form})


def output(request):

    return render(request, 'play_outcomes/output.html', context)

它从表单中获取数据，使用它来查询数据集。问题是，当我尝试显示模板时，图像{{img}}不会出现。

在网页上我得到了这个：<HttpResponse status_code=200, "image/png">但不是图片。救命啊！

Django - matplotlib图像不显示

0 个答案: