Python 为什么不是'；我的Django表单的初始值是否已设置？

以下是相关的代码片段

forms.py

usersegment = [['non-paying','Non-paying (Coming soon)'],['paying','Paying (Coming soon)'], ['all', 'All']]

class SegmentForm(forms.Form):
    usersegment = forms.ChoiceField(label="", widget=RadioSelect(), choices=usersegment)

if request.method == 'GET' and 'datestart' in request.GET:

    return render_to_response('activation/activation_signupcount.html', 
                            {   'datestart': request.GET['datestart'], 
                                'dateend': request.GET['dateend'], 
                                'usersegment': request.GET['usersegment'], 
                                'form': SegmentForm(request.GET), 
                                'form2': DateSelectForm(request.GET)    })
else:

    return render_to_response('activation/activation_signupcount.html', 
                            {'form': SegmentForm(initial={'all':'All'}), 'form2': DateSelectForm()})

视图.py

usersegment = [['non-paying','Non-paying (Coming soon)'],['paying','Paying (Coming soon)'], ['all', 'All']]

class SegmentForm(forms.Form):
    usersegment = forms.ChoiceField(label="", widget=RadioSelect(), choices=usersegment)

if request.method == 'GET' and 'datestart' in request.GET:

    return render_to_response('activation/activation_signupcount.html', 
                            {   'datestart': request.GET['datestart'], 
                                'dateend': request.GET['dateend'], 
                                'usersegment': request.GET['usersegment'], 
                                'form': SegmentForm(request.GET), 
                                'form2': DateSelectForm(request.GET)    })
else:

    return render_to_response('activation/activation_signupcount.html', 
                            {'form': SegmentForm(initial={'all':'All'}), 'form2': DateSelectForm()})

首字母是key:value（fieldname/value）对。应该是这样的,

else:
    return render_to_response('activation/activation_signupcount.html', 
              {'form': SegmentForm(initial={'usersegment':'all'}), 
               'form2': DateSelectForm()
              })

---

好吧，那就更有意义了。我希望有人会说“关键：其他答案中的价值”。谢谢你。我想一个更优秀的程序员会从大括号中找到答案。顺便说一句，forms.py上有没有任何地方我可以设置它，这样我就不必为所有视图重复

initial={'usersegment'：'all'}

？我试着像

usersegment=forms.ChoiceField（label=”“，widget=RadioSelect（），choices=usersegment，initial={'usersegment'：'all'}）那样附加它

，但它不起作用。谢谢。是的，usersegment=forms.ChoiceField（initial='all'label=“”，widget=RadioSelect（），choices=usersegment）