在Django中添加联系人表单时找不到Contact_form

from django import forms

class Contact_form(forms.Form):
    name = forms.CharField(max_length=100)
    email = forms.EmailField()
    message = forms.CharField(widget=forms.Textarea)

from .forms import Contact_form

def contact_view(request):
    form = Contact_form()
    # 处理表单提交逻辑
    ...

<form method="post" action="{% url 'contact' %}">
    {% csrf_token %}
    {{ form }}
    <button type="submit">提交</button>
</form>