什么是惯用的Python相当于Django的'重新组合'模板标签？

Question

http://docs.djangoproject.com/en/dev/ref/templates/builtins/#regroup

我可以想到几种用循环做的方法,但我特别想知道是否有一个整齐的单行.

Answer 1

结合itertools.groupby起来operator.itemgetter获得一个非常好的解决方案:

from operator import itemgetter
from itertools import groupby

key = itemgetter('gender')
iter = groupby(sorted(people, key=key), key=key)

for gender, people in iter:
    print '===', gender, '==='
    for person in people:
        print person