def _by_list(request, names, every_name):
every_names = request.GET.getlist(every_name, '')
names_list = map(lambda n: Q(**{names:n}), every_names)
if names_list == []: # Expression can be simplified
return Q(**{names:'_'})
else:
return reduce(lambda a, b: a | b, names_list)
如果我使用＆＃39;如果names_list＆＃39;它没有按预期工作