https://blog.csdn.net/hng1992/article/details/89642251
from functools import reduce data_list = [{"a": "123", "b": "321"}, {"a": "123", "b": "321"}, {"b": "321", "a": "123"}] run_function = lambda x, y: x if y in x else x + [y] reduce(run_function, [[], ] + data_list)
reduce函数为Python内置函数：
reduce(function, iterable[, initializer])
将数据集中的第一个和第二个元素通过function（有两个参数）进行运算处理，得到的结果在和第三个元素进行运算，以此类推
run_function 对传入参数进行判断去重
[[], ] + data_list 为可迭代对象