如何在django中从普通html中的select选项值返回int

<select name="my_select">
  <option value="1">Option 1</option>
  <option value="2">Option 2</option>
  <option value="3">Option 3</option>
</select>

from django.shortcuts import render

def my_view(request):
    if request.method == 'POST':
        selected_value = int(request.POST.get('my_select'))
        # 处理选中的值
        ...
        return render(request, 'success.html')
    else:
        # 渲染包含下拉列表的HTML页面
        return render(request, 'my_form.html')