Question

我试图将一个Bokeh图嵌入一个有上传按钮的Django网站。我使用给定here的示例作为起点，然后添加有关here嵌入的说明。这是我的问题here的后续跟进，因为我现在遇到了一个新问题。当我转到与之关联的网址时，情节不会显示，但没有错误消息并且页面加载。

我使用了need-a-minimal-django-file-upload-example/for_django_1.8，当我导航到网址http://<port>/myapp/list/

时，它按预期工作

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"),
)

以下是views.py和simple_chart.html。当我导航到http://<port>/myapp/simple_chart/时，simple_chart函数应生成一个图。

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})

simple_chart.html

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

    {{the_div|safe}}

</body>
</html>

但这就是我所看到的，都是空的。

我尝试用pdb.set_trace()代替断点，正如您在上面的views.py中看到的那样。当我导航到网址时，script和div都有值：

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>'

div

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

而且我不知道为什么我没有获得图像，因为据我所知，我遵循了embedding plots and apps样板和基本上复制粘贴的代码，用于从那里创建绘图：

以下两者均直接来自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)

样板：

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

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

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

    </head>
    <body>
        <!-- INSERT DIVS HERE -->
    </body>
</html>

那是什么给出的？为什么我看不到散景情节呢？我正在使用pycharm并已阅读答案here，虽然我没有使用＆＃34;小绿色按钮＆＃34;但它可能会因调试而中断。所以我不认为这是一个pycharm问题

Answer 1

@bigreddot在评论中很容易解释我的问题。

如下所示更改simple_chart.html解决了这个问题。

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

    {{the_div|safe}}

</body>
</html>

请注意，如果您仍有问题（即空白散点图）并且您是pycharm用户，则可能是由于最近更新中存在潜在错误：PyCharm 5.0.4＃143.1919.1。尝试通过终端运行，如果它工作，那么pycharm可能有问题，而不是你的代码。

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

此外，向下滚动以查看如何通过以下链接解决问题：

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

Bokeh plot does not appear on the same django page after csv upload

Answer 2

我有类似问题的罪魁祸首是散景版。我正在使用PyCharm 2017.3.4（社区版）

我复制了

<script src="http://cdn.pydata.org/bokeh/release/bokeh-0.11.0.min.js"></script>
<link rel="stylesheet" href="http://cdn.pydata.org/bokeh/release/bokeh-0.11.0.min.css">

检查散景版本，例如pip freeze并获取散景版本bokeh==0.12.14

然后适当地改变

<script src="http://cdn.pydata.org/bokeh/release/bokeh-0.12.14.min.js"></script>
<link rel="stylesheet" href="http://cdn.pydata.org/bokeh/release/bokeh-0.12.14.min.css">

在Django网站中嵌入Bokeh图导致空白页面没有错误消息

2 个答案: