如何选择froms.ChoiceField为Django表单

Question

class CountryLevelOptimization(forms.Form):
    name = forms.CharField()
    country = forms.ChoiceField(widget=forms.Select, choices=(('A','a'),('B','b')))

上面是我的Django表单，其中country是一个ChoiceField 以下是我的python代码。

def Homepage(request):
    choices = (('Country1','India'),('Country2','USA'))
    form = CountryLevelOptimization()
    # How to pass choices to the form['country'] 
    return render(request,"Dummy.html",{"form":form})

如何从视图主页中将选项传递到该国家？

请帮助我。