# -*- coding: utf-8 -*-
import sys
import copy


def read_files(filename):
    all = dict()
    with open(filename, 'r') as f:
        data = f.read().strip()
    for line in data.split("\n"):
        try:
            all[line.split("======")[-1]] = line.split("======")[0]

        except Exception:
            pass
    return all


def main():
    # 要读的文件写入其中，多条记录用,分割，注意不要用全角的"，"
    filenames = ("a.txt", "b.txt")

    # 记录所有数据，标题为字典的key，URL为字典的值(如果有价格，可以将(url,价格)作为字典的values)
    new_data = dict()
    # 这个列表记录有交集的标题，会在数据统计完毕从new_data中删除
    intersection = list()
    for filename in filenames:
        data = read_files(filename)
        for key in data.keys():
            if key in new_data:
                intersection.append(key)
            else:
                new_data[key] = data[key]
    # 将全部数据做一个备份，可能会有其他需求用到
    all_data = copy.deepcopy(new_data)
    with open('out1.txt', "a+") as f:
        for item in intersection:
            all_data.pop(item)
            #将重复的内容写入out1.txt
            temp = f"{new_data[item]}===={item}\n"
            f.write(temp)



    out = list()
    with open('out.txt', "a+") as f:
        for key in all_data:
            # 这种写法是python3.6后支持的，版本低的话可以写temp="{0}===={1}".format(all_data[key],key)
            temp = f"{all_data[key]}===={key}\n"
            out.append(temp)
            f.write(temp)

    print(out)


if __name__ == "__main__":
    main()