ImportError when trying to embed a Bokeh plot alongside a Django upload button

问题

I'm trying to embed a Bokeh plot into a Django site that has an upload button. I'm using the example given here as a starting point and then adding on the instructions on embedding from here. I used need-a-minimal-django-file-upload-example/for_django_1.8 and it works as intended. I've then modified the following files, but I get the following error:

ImportError: No module named 'myapp'

You can see my directory structure here and the three files modified/added:

If you cannot load the image, here:

.
└── myproject
    ├── db.sqlite3
    ├── manage.py
    ├── media
    │   └── documents
    │       └── 2016
    │           └── 01
    │               ├── 12
    │               │   └── silico_0_truth_filtered_ptps.csv
    │               └── 15
    │                   └── silico_0_truth_filtered_ptps.csv
    └── myproject
        ├── __init__.py
        ├── myapp
        │   ├── admin.py
        │   ├── forms.py
        │   ├── __init__.py
        │   ├── migrations
        │   │   ├── 0001_initial.py
        │   │   ├── __init__.py
        │   │   └── __pycache__
        │   │       ├── 0001_initial.cpython-35.pyc
        │   │       └── __init__.cpython-35.pyc
        │   ├── models.py
        │   ├── __pycache__
        │   │   ├── admin.cpython-34.pyc
        │   │   ├── admin.cpython-35.pyc
        │   │   ├── forms.cpython-35.pyc
        │   │   ├── __init__.cpython-34.pyc
        │   │   ├── __init__.cpython-35.pyc
        │   │   ├── models.cpython-34.pyc
        │   │   ├── models.cpython-35.pyc
        │   │   ├── urls.cpython-35.pyc
        │   │   └── views.cpython-35.pyc
        │   ├── templates
        │   │   ├── list.html
        │   │   └── simple_chart.html
        │   ├── tests.py
        │   ├── urls.py
        │   └── views.py
        ├── __pycache__
        │   ├── __init__.cpython-34.pyc
        │   ├── __init__.cpython-35.pyc
        │   ├── settings.cpython-34.pyc
        │   ├── settings.cpython-35.pyc
        │   ├── urls.cpython-35.pyc
        │   └── wsgi.cpython-35.pyc
        ├── settings.py
        ├── urls.py
        └── wsgi.py

Here is templates/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-0.8.1.min.js"></script>
    <link rel="stylesheet" href="http://cdn.bokeh.org/bokeh/release/bokeh-0.8.1.min.css">
</head>
<body>

    {{the_div|safe}}

    {{the_script|safe}}
</body>
</html>

Here is myapp/urls.py (The error originates here. I can't understand why the import cannot be resolved):

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

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

Here is myapp/views.py:

# -*- 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)

    return render(request, "simple_chart.html", {"the_script":script, "the_div":div})

回答1:

After spending a few days ploughing through the Django tutorial I saw how they imported views there and thus I changed myapp/urls.py to be as follows:

# -*- 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"),
)

This removes the ImportError, though I cannot explain why.

来源：https://stackoverflow.com/questions/34742429/importerror-when-trying-to-embed-a-bokeh-plot-alongside-a-django-upload-button

标签

python

django

bokeh