修改表单Django中的下拉菜单选项

from django import forms

class MyForm(forms.Form):
    CHOICES = (
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
        ('option3', 'Option 3'),
    )
    dropdown = forms.ChoiceField(choices=CHOICES)

from django.shortcuts import render
from .forms import MyForm

def my_view(request):
    form = MyForm()
    return render(request, 'my_template.html', {'form': form})

<form method="POST">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">Submit</button>
</form>

def my_view(request):
    form = MyForm()
    form.fields['dropdown'].choices = (
        ('option1', 'New Option 1'),
        ('option2', 'New Option 2'),
        ('option3', 'New Option 3'),
    )
    return render(request, 'my_template.html', {'form': form})