在Django中如何在form.ImageFiled上使用CSS？

from django import forms

class MyForm(forms.Form):
    image = forms.ImageField()

from django.forms import ClearableFileInput

class MyImageWidget(ClearableFileInput):
    template_name = 'my_image_widget.html'  # 指定自定义的HTML模板文件

    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)
        context['widget']['image_css_class'] = 'my-image-css-class'  # 添加CSS类名
        return context

<!-- my_image_widget.html -->
<div class="{{ widget.image_css_class }}">
    {{ widget.input }}
    {{ widget.clear_template }}
    <label for="{{ widget.input['id_for_label'] }}">{{ widget.label }}</label>
    {{ widget.current_image }}
</div>

class MyForm(forms.Form):
    image = forms.ImageField(widget=MyImageWidget)