python之模板渲染期间要解压的值太多

我现在正在学习 Django，我遇到了这个让我有点难过的错误。我正在尝试将我的表格放到我的主页上

我收到这个错误:

代码:

主页/views.py:

from django.shortcuts import render 
from forms import TestForm 
from django.http import HttpResponseRedirect 
 
def home(request): 
    if request == 'POST': 
        # create a form instane and populate it with data from the request 
        form = TestForm(request.POST) 
        if form.is_valid(): 
            # process the data in form.cleaned_data as required 
            form.cleaned_data() 
            # redirect to a new URL: 
            return HttpResponseRedirect('/test/') 
    # if a GET (or any other method) we'll create a blank form 
    else: 
        form = TestForm() 
    return render(request, 'home/home_page.html', {'form': form}) 
 
 
def scan_events(request): 
    if request == "POST": 
        # json = request.POST['testData'] 
        # condition statement for file upload ot c/p events 
 
        return render(request, 'home/test.html', {'data': request.POST}) 
 
 
def test(request): 
    request(request, 'home/test.html') 

主页/forms.py

from django import forms 
 
TEST_TYPE_CHOICES = ('HDFS', 'HIVE', 'BOTH') 
 
class TestForm(forms.Form): 
    # hdfs_test = forms.MultipleChoiceField() 
    # hive_test = forms.MultipleChoiceField() 
    # hdfs_hive_test = forms.MultipleChoiceField() 
    test_type = forms.MultipleChoiceField(required=True, widget=forms.RadioSelect(), choices=TEST_TYPE_CHOICES) 
    event_textarea = forms.Textarea(attrs={'rows': '8', 'class': 'form-control', 'placeholder': 'Events...', 'id': 'event_textarea'}) 
    # file_upload = forms.FileInput() 

urls.py:

urlpatterns = patterns('', 
    url(r'^admin/', include(admin.site.urls)), 
    url(r'^$', 'home.views.home', name='home'), 
    url(r'test/$', 'home.views.test'), 
 
) 

主页/模板/主页/home_page.html

{% extends 'index/index.html' %} 
 
{% load staticfiles %} 
{% block head %} 
  <script type="text/javascript" src="{{ STATIC_URL }}home/js/home.js" async></script> 
  <link href="{{ STATIC_URL }}home/css/home.css" rel="stylesheet"> 
{% endblock head %} 
 
{% block content %} 
 
  <div>Welcome to Trinity E2E testing</div> 
 
  <form id="test-form" action="/test/" method="post"> {# pass data to /test/ URL #} 
    {% csrf_token %} 
 
    {{ form }} 
 
    <input id="submit-test" type="submit" class="btn btn-default btn-lg" value="Submit"> 
  </form> 
 
{% endblock content %} 

请您参考如下方法:

choices应该是键-描述对的序列(准确地说是可迭代的)。

TEST_TYPE_CHOICES = [ 
    ('HDFS', 'HDFS'), 
    ('HIVE', 'HIVE'), 
    ('BOTH', 'Both of HDFS and HIVE'), 
] 

错误信息的解释:

字符串也是序列。所以使用 choices 的代码将字符串视为 4 个字符的序列(准确地说是字符串，因为 Python 中没有字符类型)。这就是您收到错误的原因:too many values to unpack

>>> a, b = ('HDFS', 'HDFS') 
>>> a, b = 'HDFS' 
Traceback (most recent call last): 
  File "<stdin>", line 1, in <module> 
ValueError: too many values to unpack 

如果字符串都是 2 个字符的字符串，它会隐藏(而不是解决)问题。

>>> a, b = 'HD' 
>>> a 
'H' 
>>> b 
'D'