Question

我一直在努力解决一个问题，本网站上的类似问题对我没有帮助。我正在学习Django，我想将一个图像PNG（我用Python生成）打印到HTML页面中（因此，按照Django的规则，我使用HTML模板）。为了创建我的图片，我已经将一些代码写入了一个SEPARATED views.py文件（我称之为views1.py），这里是内容：

from pylab import figure, axes, pie, title
from matplotlib.backends.backend_agg import FigureCanvasAgg
import matplotlib.pyplot
from django.http import HttpResponse 


def test_matplotlib(request):
    f = figure(figsize=(6,6))
    ax = axes([0.1, 0.1, 0.8, 0.8])
    labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
    fracs = [15,30,45, 10]
    explode=(0, 0.05, 0, 0)
    pie(fracs, explode=explode, labels=labels, autopct='%1.1f%%', shadow=True)
    title('Raining Hogs and Dogs', bbox={'facecolor':'0.8', 'pad':5})

    canvas = FigureCanvasAgg(f)    
    response = HttpResponse(content_type='image/png')
    canvas.print_png(response)
    matplotlib.pyplot.close(f)
    return response

在我的views.py中，我定义了一个函数，该函数允许用户搜索股票的股票代码。当他提交请求时，用户将在那一刻看到股票的价格，这是我的功能（这个功能有效，我已经测试过了）：

 # import some packages (for the answer, ignore those that are not related, I have other functions in this views.py file)
from django.shortcuts import render
from django.http import HttpResponse 
from yahoo_finance import Share
import datetime as dt
import pandas_datareader.data as web
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

def enterTicker(request):
    errors = []
    if 'q' in request.GET:
        q = request.GET['q']
        ticker = q
        ticker2=Share('%s'%ticker)
        pricetoday=ticker2.get_price()
        if not q:
            errors.append('Enter a valid ticker.')
        elif(pricetoday==None):
            errors.append('Enter a valid ticker.')
        else:
            return render(request, 'search_results.html',
                      {'query': q, 'ticker': q, 'pricenow': pricetoday})
    return render(request, 'search_form.html',
              {'errors': errors})

在我的urls.py文件中，我这样做了：

from django.conf.urls import include, url
from django.contrib import admin
from mysite import views, views1

urlpatterns = [
    ...,
    url(r'^search/$', views.enterTicker),    
    ...,
]

最后，我有我的模板search_results.html：

<html>     
    <head>         
    <title>Book Search</title>     
    </head>     
    <body>       
        <p>You searched for: <strong>{{ query }}</strong></p>

        {% if ticker %}           
            <p>The price of {{ ticker }} in this moment is {{ pricenow }}.</p>

        <img src="../views1.py" />

        {% else %}           
            <p>No tickers matched your search criteria.</p>       
        {% endif %}     
    </body>
</html>

有人理解为什么我在views1.py中生成的PNG图片与我的HTML模板之间的链接不起作用？非常感谢，我真的被困在这个

DJANGO：将PNG图片显示为HTML模板

0 个答案: