如何在Django中创建下拉菜单？

from django import forms

class MyForm(forms.Form):
    my_choices = [
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
        ('option3', 'Option 3'),
    ]
    my_dropdown = forms.ChoiceField(choices=my_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.my_dropdown }}
  <input type="submit" value="Submit">
</form>