无法在TemplateView中读取json

from django.views.generic import TemplateView
import json

class MyView(TemplateView):
    template_name = 'my_template.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # 读取JSON数据
        with open('data.json') as f:
            data = json.load(f)
        context['json_data'] = data
        return context

<!-- my_template.html -->
{% for item in json_data %}
    <p>{{ item }}</p>
{% endfor %}