以下是我从函数中提取的代码片段,
它只是从Django查询集对象获取数据并转换为列表,使用itemgetter和itertools方法来去除重复项,类似于Python从列表中删除重复的字典。
hc = HomeContractorDetails.objects.filter(category=domain_obj.category,city__icontains=domain_obj.city).values(*args)
_arg = list(args)
_arg.remove('id')
hc = list(hc)
print _arg,hc
n= hc.sort(key=operator.itemgetter(_arg))
以上语句出现错误。
['con_name', 'rating', 'review_no'] [{'rating': u'4.32', 'review_no': u'51', 'id': 3781, 'con_name': u"Carter's Mechanical, Inc."}, {'rating': u'4.02', 'review_no': u'29', 'id': 3782, 'con_name': u'All Mechanical Plumbing & Heating, Inc.'}, {'rating': u'4.17', 'review_no': u'5', 'id': 3783, 'con_name': u'Marcelo Construction'}, {'rating': u'4.63', 'review_no': u'34', 'id': 3784, 'con_name': u'Jay Ell Plumbing and Heating Company, Inc.'}, {'rating': u'4.94', 'review_no': u'24', 'id': 3785, 'con_name': u'Franco Belli Plumbing and Heating and Sons, Inc.'}]
File "/home/gridlex/workspace/HA/article/views.py" in fetch_contractor_tables
213. n= hc.sort(key=operator.itemgetter(_arg))
Exception Type: TypeError at /article/top-rated-plumbing-contractors-in-new-york
Exception Value: unhashable type: 'list'
变量hc打印出字典值列表。但是我无法使用itemgetter keyfunc进行排序。你能帮我找出问题所在吗?