<--------------主函数-------------------> from pymongo import MongoClient from bson.objectid import ObjectId from read_json  import read def mongoclient():     client = MongoClient('127.0.0.1', 27017)     db = client.test     collection = db.test     # collection.insert({})     # for i in collection.find({"name":"乐清市东岸北段"}):     #      print(i)     data = ('coastlines.real.json')     find_Da = ('track')     find_Id = ('coastlineid')     find_Node = ('nodes_index')     want_Data = read(data, find_Da)  #传入json文件，根据关键字查询     want_Id = read(data, find_Id)     want_No = read(data, find_Node)     id = {'_id': ObjectId(want_Id)}     id_print = collection.find_one(id)     print(id_print)     collection.update((id), {'$set': {'track': want_Data}})   #根据ObjectID修改track     collection.update((id), {'$push': {'nodeindex': want_No}})  #根据ObjectID添加nodeindex     collection.update((id), {'$set': {'nodeindex': want_No}})   #根据ObjectID修改nodeindex ,去除多余的[]     id_change = collection.find_one(id)   #调出修改后的数据     print("修改后:")     print(id_change) if __name__ =='__main__':     mongoclient() <---------------读取文件代码----------------------->

import json def read(data, find):     # 设置以utf-8解码模式读取文件，encoding参数必须设置，否则默认以gbk模式读取文件，当文件中包含中文时，会报错     f = open(data, encoding='utf-8')     setting = json.load(f)     # 注意多重结构的读取语法     # family = setting['BaseSettings']['font']     style = setting[find]     # print(family)     return style