84669 person learning
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认证0级讲师
好吧，自己搞定了
from operator import itemgetter from itertools import groupby lst = [dict(category=c.category.name, title=c.title) for c in Course.objects] lst.sort(key=itemgetter('category')) categories = [(category, len(list(items))) for category, items in groupby(lst, key=itemgetter('category'))]
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
好吧，自己搞定了