python连接MongoDB和PostgreSQL

from pymongo import MongoClient
import psycopg2
import datetime
import random
import os
os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'
import sys
from decimal import *

def get_date(days):
    return datetime.datetime.now() - datetime.timedelta(days=days)
########################################

def main(arg=sys.argv):# 获取运行时参数
    for i in arg:
        if 'ID' in i:
            ID = i.split("=")[1]
    
    # 连接postgreSql
    connPg = psycopg2.connect(database="haiyoung", user="haiyoung", password="xxxxxx", host="127.0.0.1", port="2333")
    cur = connPg.cursor()
    # 从 table 中取出 id = 008459aea6a04110b3e7b070ca3d0087 的所有值
    cur.execute("SELECT * FROM tableName where id = '008459aea6a04110b3e7b070ca3d0087';")
    rows = cur.fetchall() # 取出所有满足条件的数据

    # 连接Mongodb
    connMongo = MongoClient('127.0.0.1', 20000)
    db = connMongo.mydb  #连接mydb数据库，没有则自动创建
    db.authenticate("haiyoung", "xxxxxx") #用户校验

    my_set = db.hy_collection  #使用 hy_collection 集合，没有则自动创建

    #插入数据 Mongo pg
    # my_set.insert({"runtime_id":"123","date":date,"value":18})
    # my_set.insert({"id":id, "date":rows[i].date, "test_id":rows[i].test_id, "weight":rows[i].weight})
    # bson 暂不支持 datetime 以及 decimal 类型自动转换，需另行处理 rows[i][1].strftime('%Y-%m-%d')  "weight":float(rows[i][3])
    for i in range(len(rows)):
        my_set.insert({"id":ID, "date":rows[i][1].strftime('%Y-%m-%d'), "test_id":rows[i][2], "weight":float(rows[i][3])})
        cur.execute("INSERT INTO tableName(id,date,test_id,weight)VALUES(%s,%s,%s,%s)",(ID,rows[i][1],rows[i][2],rows[i][3]))
    
    connPg.commit()
    cur.close()
    connPg.close()

main(sys.argv)