pymongo helper

import pymongo
import click

# 数据库基本信息
db_configs = {
    'type': 'mongo',
    'host': '127.0.0.1',
    'port': '27017',
    "user": "",
    "password": "",
    'db_name': 'mafengwo'
}


class Mongo():
    def __init__(self):
        self.db_name = db_configs.get("db_name")
        self.host = db_configs.get("host")
        self.port = db_configs.get("port")
        self.client = pymongo.MongoClient(f'mongodb://{self.host}:{self.port}', connect=False, maxPoolSize=10)
        self.username = db_configs.get("user")
        self.password = db_configs.get("passwd")
        if self.username and self.password:
            self.db = self.client[self.db_name].authenticate(self.username, self.password)
        self.db = self.client[self.db_name]

    def reset_status(self, col="dianping_seed_data"):
        self.db[col].update_many({'$or': [{'status': 1}, {'status': 3}]}, {'$set': {"status": 0}})

    def reset_all_status(self, col="dianping_seed_data"):
        self.db[col].update_many({}, {'$set': {"status": 0}})

    def add_index(self, col="dianping_seed_data"):
        # status_code 0:初始,1:开始下载，2下载完了
        self.db[col].create_index([('status', pymongo.ASCENDING)], unique=True)

    def get_index(self, col="dianping_seed_data"):
        indexlist = self.db[col].list_indexes()
        for index in indexlist:
            print(index)

    # 找出重复的放入result表中
    def find_duplicate(self, col="dianping_seed_data"):
        """
         {'$out': 'result'}:聚合之后将结果写到新的集合result表里。
        :param col:
        :return:
        """
        result = self.db[col].aggregate([
            {'$group': {
                '_id': {'url': "$url"},
                '_id_list': {'$addToSet': "$_id"},  ##_id字段添加到返回结果里面去
                'count': {'$sum': 1}
            }, '$match': {
                'status': {'$lte': 0}
            }
            }, {'$out': 'result'}
        ], allowDiskUse=True)
        for item in result:
            print(item)
        return result

    def delete_dup(self, col="dianping_seed_data"):
        delete_data = self.db.result.find()
        try:
            for d in delete_data:
                # 保留一条
                unique_id_list = d.get("_id_list")[1:]
                for did in unique_id_list:
                    self.db[col].delete_one({'_id': did})
            self.db.result.drop()
        except Exception as e:
            print("删除的时候出现问题", e.args)


@click.command()
@click.option('--s', type=str, default="two", help="状态:all表示全部重置为0,two:表示重置状态为1、3的重置为0")
@click.option('--i', type=str, default="a", help="a:增加索引 g:获取索引")
def run(s, i):
    m = Mongo()
    if s:
        print("获取参数为:", s)
        if s == "all":
            print("所有数据状态重置为0:", s)
            m.reset_all_status()
        elif s == "two":
            print("部分数据状态重置为0:", s)
    if i:
        if i == "a":
            m.add_index()
        elif i == "g":
            m.get_index()


if __name__ == '__main__':
    m = Mongo()
    m.delete_dup()

来源：https://www.cnblogs.com/c-x-a/p/11844881.html