那些遇到过的问题

在Django网站中嵌入散景图会导致空白页，没有错误消息

Fri*_*ter 6 python django pycharm bokeh

我正在尝试将Bokeh图嵌入到具有上传按钮的Django网站中。我以此处给出的示例为起点，然后添加了有关从此处进行嵌入的说明。这是我在这里提出的问题的后续措施，因为我现在有一个新问题。当我转到与之关联的URL时，该图不会显示，但是没有错误消息并且页面已加载。

我使用了need-a-minimal-django-file-upload-example/for_django_1.8它，并且在导航到URL时可以按预期工作http://<port>/myapp/list/

在此处输入图片说明

myapp/url.py 看起来像这样

# -*- coding: utf-8 -*-
from django.conf.urls import patterns, url
from . import views

urlpatterns = patterns('myproject.myapp.views',
    url(r'^list/$', 'list', name='list'),
    url(r'^simple_chart/$', views.simple_chart, name="simple_chart"),
)
Run Code Online (Sandbox Code Playgroud)

这是views.py和simple_chart.html。当我导航到http://<port>/myapp/simple_chart/该simple_chart函数时，应生成一个图。

views.py

import pdb
# -*- coding: utf-8 -*-
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse

from myproject.myapp.models import Document
from myproject.myapp.forms import DocumentForm

from django.shortcuts import render
from bokeh.plotting import figure
from bokeh.resources import CDN
from bokeh.embed import components


def list(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile=request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect(reverse('myproject.myapp.views.list'))
    else:
        form = DocumentForm()  # A empty, unbound form

    # Load documents for the list page
    documents = Document.objects.all()

    # Render list page with the documents and the form
    return render_to_response(
        'list.html',
        {'documents': documents, 'form': form},
        context_instance=RequestContext(request)
    )

def simple_chart(request):
    plot = figure()
    plot.circle([1,2], [3,4])

    script, div = components(plot, CDN)
    #pdb.set_trace()
    return render(request, "simple_chart.html", {"the_script":script, "the_div":div})
Run Code Online (Sandbox Code Playgroud)

simple_chart.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Experiment with Bokeh</title>
    <script src="http://cdn.bokeh.org/bokeh/release/bokeh-0.9.0.min.js"></script>
    <link rel="stylesheet" href="http://cdn.bokeh.org/bokeh/release/bokeh-0.9.0.min.css">
    {{the_script|safe}}
</head>
<body>

    {{the_div|safe}}

</body>
</html>
Run Code Online (Sandbox Code Playgroud)

但这就是我所看到的，都是空的。

在此处输入图片说明

pdb.set_trace()如您所见，我尝试用替换断点views.py。双方script并div当我浏览到URL有值：

script

(Pdb)  script
'\n<script type="text/javascript">\n    Bokeh.$(function() {\n    var docs_json = {"16f6d3df-63fd-495d-9eec-ea3aab28b407": {"roots": {"references": [{"id": "4dc7cc72-cd52-4613-aaa2-ec93471f694b", "type": "DataRange1d", "attributes": {"callback": null}}, {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot", "attributes": {"tools": [{"id": "4d60f7b2-0da1-48d0-9c2c-659df516c0b9", "type": "PanTool"}, {"id": "dbbfac54-7529-4686-b18b-288f0ece3d19", "type": "WheelZoomTool"}, {"id": "2083997a-0bd7-46bc-b46c-fd537f7bc5b0", "type": "BoxZoomTool"}, {"id": "065744d9-e11f-4f4f-81de-1fcff22fba0f", "type": "PreviewSaveTool"}, {"id": "60c5f5c0-699a-4457-8ee4-4ab4ae59fea5", "type": "ResizeTool"}, {"id": "3875ebde-81d3-4d2b-8c0a-fdb3c62befb1", "type": "ResetTool"}, {"id": "5265f945-25ed-438a-8dbb-8ed4ffd8cc88", "type": "HelpTool"}], "x_range": {"id": "f7502b7f-436b-4346-b6d8-1b38ec8b952f", "type": "DataRange1d"}, "renderers": [{"id": "a89b6514-5796-4174-a875-a48cb57a4fe1", "type": "LinearAxis"}, {"id": "5e16dd18-2495-4802-b747-c2d5d40ff627", "type": "Grid"}, {"id": "1f9e2ca7-88c0-4394-ab65-f4c96f73ad26", "type": "LinearAxis"}, {"id": "47341cd5-9be7-47b9-9576-e09abc2e2488", "type": "Grid"}, {"id": "d1ea5c26-8c19-42fe-9c2e-7071fd921adf", "type": "BoxAnnotation"}, {"id": "08786c7e-0575-40f3-8cfa-030adb650929", "type": "GlyphRenderer"}], "below": [{"id": "a89b6514-5796-4174-a875-a48cb57a4fe1", "type": "LinearAxis"}], "left": [{"id": "1f9e2ca7-88c0-4394-ab65-f4c96f73ad26", "type": "LinearAxis"}], "y_range": {"id": "4dc7cc72-cd52-4613-aaa2-ec93471f694b", "type": "DataRange1d"}, "tool_events": {"id": "a7e57d1e-52a2-408d-9c53-1e2eadc7b1f1", "type": "ToolEvents"}}}, {"id": "1f9e2ca7-88c0-4394-ab65-f4c96f73ad26", "type": "LinearAxis", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}, "ticker": {"id": "27375dd5-6ffd-418e-a2bb-7dfcee967f0e", "type": "BasicTicker"}, "formatter": {"id": "5b7afacf-63d7-4ccc-8752-47687f2cc6a1", "type": "BasicTickFormatter"}}}, {"id": "dbbfac54-7529-4686-b18b-288f0ece3d19", "type": "WheelZoomTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "2083997a-0bd7-46bc-b46c-fd537f7bc5b0", "type": "BoxZoomTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}, "overlay": {"id": "d1ea5c26-8c19-42fe-9c2e-7071fd921adf", "type": "BoxAnnotation"}}}, {"id": "60c5f5c0-699a-4457-8ee4-4ab4ae59fea5", "type": "ResizeTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "5e16dd18-2495-4802-b747-c2d5d40ff627", "type": "Grid", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}, "ticker": {"id": "6e344350-1f50-4314-aaba-922a4f9d0f5c", "type": "BasicTicker"}}}, {"id": "b83aaff2-f295-4e62-a7c5-a56f848dbbd0", "type": "ColumnDataSource", "attributes": {"data": {"x": [1, 2], "y": [3, 4]}, "callback": null, "column_names": ["x", "y"]}}, {"id": "a7e57d1e-52a2-408d-9c53-1e2eadc7b1f1", "type": "ToolEvents", "attributes": {}}, {"id": "27375dd5-6ffd-418e-a2bb-7dfcee967f0e", "type": "BasicTicker", "attributes": {}}, {"id": "ca5882e6-81a2-4ceb-a9d3-d459e1597306", "type": "Circle", "attributes": {"x": {"field": "x"}, "line_color": {"value": "#1f77b4"}, "fill_color": {"value": "#1f77b4"}, "y": {"field": "y"}}}, {"id": "f7502b7f-436b-4346-b6d8-1b38ec8b952f", "type": "DataRange1d", "attributes": {"callback": null}}, {"id": "6e344350-1f50-4314-aaba-922a4f9d0f5c", "type": "BasicTicker", "attributes": {}}, {"id": "a89b6514-5796-4174-a875-a48cb57a4fe1", "type": "LinearAxis", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}, "ticker": {"id": "6e344350-1f50-4314-aaba-922a4f9d0f5c", "type": "BasicTicker"}, "formatter": {"id": "08eea83f-0d3a-40b8-94b8-39c254ab4256", "type": "BasicTickFormatter"}}}, {"id": "5265f945-25ed-438a-8dbb-8ed4ffd8cc88", "type": "HelpTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "3875ebde-81d3-4d2b-8c0a-fdb3c62befb1", "type": "ResetTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "8172ee67-a90f-4452-8bf2-06a9bb36989f", "type": "Circle", "attributes": {"x": {"field": "x"}, "line_color": {"value": "#1f77b4"}, "fill_color": {"value": "#1f77b4"}, "fill_alpha": {"value": 0.1}, "line_alpha": {"value": 0.1}, "y": {"field": "y"}}}, {"id": "08eea83f-0d3a-40b8-94b8-39c254ab4256", "type": "BasicTickFormatter", "attributes": {}}, {"id": "47341cd5-9be7-47b9-9576-e09abc2e2488", "type": "Grid", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}, "ticker": {"id": "27375dd5-6ffd-418e-a2bb-7dfcee967f0e", "type": "BasicTicker"}, "dimension": 1}}, {"id": "5b7afacf-63d7-4ccc-8752-47687f2cc6a1", "type": "BasicTickFormatter", "attributes": {}}, {"id": "065744d9-e11f-4f4f-81de-1fcff22fba0f", "type": "PreviewSaveTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "4d60f7b2-0da1-48d0-9c2c-659df516c0b9", "type": "PanTool", "attributes": {"plot": {"id": "187abafd-5966-4ab2-b20f-946153f75b53", "subtype": "Figure", "type": "Plot"}}}, {"id": "08786c7e-0575-40f3-8cfa-030adb650929", "type": "GlyphRenderer", "attributes": {"nonselection_glyph": {"id": "8172ee67-a90f-4452-8bf2-06a9bb36989f", "type": "Circle"}, "selection_glyph": null, "hover_glyph": null, "glyph": {"id": "ca5882e6-81a2-4ceb-a9d3-d459e1597306", "type": "Circle"}, "data_source": {"id": "b83aaff2-f295-4e62-a7c5-a56f848dbbd0", "type": "ColumnDataSource"}}}, {"id": "d1ea5c26-8c19-42fe-9c2e-7071fd921adf", "type": "BoxAnnotation", "attributes": {"line_color": {"value": "black"}, "top_units": "screen", "fill_alpha": {"value": 0.5}, "bottom_units": "screen", "left_units": "screen", "line_width": {"value": 2}, "plot": null, "fill_color": {"value": "lightgrey"}, "level": "overlay", "render_mode": "css", "line_alpha": {"value": 1.0}, "line_dash": [4, 4], "right_units": "screen"}}], "root_ids": ["187abafd-5966-4ab2-b20f-946153f75b53"]}, "title": "Bokeh Application", "version": "0.11.0"}};\n    var render_items = [{"elementid": "edd70933-dd28-4546-b254-838bc492cb35", "modelid": "187abafd-5966-4ab2-b20f-946153f75b53", "docid": "16f6d3df-63fd-495d-9eec-ea3aab28b407"}];\n    \n    Bokeh.embed.embed_items(docs_json, render_items);\n});\n</script>'
Run Code Online (Sandbox Code Playgroud)

div

(Pdb)  div
'\n<div class="plotdiv" id="edd70933-dd28-4546-b254-838bc492cb35"></div>'
Run Code Online (Sandbox Code Playgroud)

而且我不明白为什么我没有得到图像，因为据我所知，我遵循了嵌入图和应用程序样板，并且基本上是复制粘贴的代码来从那里创建图：

以下两者均直接取自Bokeh网站：

from bokeh.plotting import figure
from bokeh.embed import components

plot = figure()
plot.circle([1,2], [3,4])

script, div = components(plot)
Run Code Online (Sandbox Code Playgroud)

样板：

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Bokeh Scatter Plots</title>

        <link rel="stylesheet" href="http://cdn.bokeh.org/bokeh/release/bokeh-0.9.0.min.css" type="text/css" />
        <script type="text/javascript" src="http://cdn.bokeh.org/bokeh/release/bokeh-0.9.0.min.js"></script>

        <!-- COPY/PASTE SCRIPT HERE -->

    </head>
    <body>
        <!-- INSERT DIVS HERE -->
    </body>
</html>
Run Code Online (Sandbox Code Playgroud)

那有什么呢？为什么我看不到散景图？我正在使用pycharm，并在这里阅读了答案，尽管我没有使用“绿色小按钮”，但可能无法调试，所以我认为这不是pycharm问题

Fri*_*ter 1

@bigreddot 在评论中很容易解释我的问题。

simple_chart.html如下更改解决了该问题。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Experiment with Bokeh</title>
    <script src="http://cdn.bokeh.org/bokeh/release/bokeh-0.11.0.min.js"></script>
    <link rel="stylesheet" href="http://cdn.bokeh.org/bokeh/release/bokeh-0.11.0.min.css">
    {{the_script|safe}}
</head>
<body>

    {{the_div|safe}}

</body>
</html>
Run Code Online (Sandbox Code Playgroud)

请注意，如果您仍然遇到问题（即空白散景图）并且您是 pycharm 用户，则可能是由于最近更新中的潜在错误所致：PyCharm 5.0.4 #143.1919.1。尝试通过终端运行，如果有效，则可能是 pycharm 有问题，而不是您的代码有问题。

http://blog.jetbrains.com/pycharm/#post-3302

另外，请向下滚动以查看问题是如何解决的，请访问以下链接：

https://youtrack.jetbrains.com/issue/PY-16021

csv 上传后，散景图不会出现在同一个 django 页面上

归档时间：

查看次数：

2883 次

最近记录：

5 年，9 月 前
需要一个最小的Django文件上传示例 645
如何将独立散景图嵌入到django模板中 31
我如何使用pycharm调试/断开我的django应用程序？ 29
更多相关链接
相关归档
为什么需要在Python方法中明确地使用"self"参数？ 187
当我使用os.system()或subprocess.call()时,如何隐藏控制台？ 59
有一个很好的Python库可以解析C++吗？ 50
在PyYAML中保存/转储带有注释的YAML文件 47
如何为HTTP标头编码UTF8文件名？(Python,Django) 45
如何将列和行的pandas DataFrame子集转换为numpy数组？ 42
电子邮件,与发件人地址不同的"回复"地址 10
仅在事务完成后才会触发post_save信号 9
python 3.4 pycharm调试器中的AssertionError 6
添加悬停以绘制多个垂直条散景 2
难疑归档
在jQuery中添加表行 2331
将字符串转换为datetime 2035
如何在jQuery中选择具有多个类的元素？ 1985
如何为C#Auto-Property提供默认值？ 1773
使div填充剩余屏幕空间的高度 1743
如何在IntelliJ中永久启用行号？ 1341
用于更新和删除的HTTP状态代码？ 1264
如何在Java中将数字舍入到n个小数位 1209
如何撤消"git commit --amend"而不是"git commit" 1198
#Hibernate hbm2ddl.auto配置的可能值是什么,它们做了什么 1046