如何在Python中封装MongoDB的关键字操作？

在Python中，你可以通过Pymongo库来封装MongoDB的关键字操作，使其更易于管理和复用。以下是一个简单的例子：

首先，导入必要的库：

from pymongo import MongoClient
from typing import List

然后，创建一个连接到MongoDB的函数，并封装查询、插入、更新和删除等操作：

def connect_to_mongodb(uri: str) -> MongoClient:
    client = MongoClient(uri)
    return client

def get_database(db_name: str, client):
    db = client[db_name]
    return db

def query_data(collection_name: str, filter_dict: dict, client=None):
    if not client:
        client = connect_to_mongodb()
    collection = get_database("your_database", client)[collection_name]
    return collection.find(filter_dict)

def insert_document(collection_name: str, document: dict, client=None):
    if not client:
        client = connect_to_mongodb()
    collection = get_database("your_database", client)[collection_name]
    result = collection.insert_one(document)
    return result.inserted_id

def update_document(collection_name: str, filter_dict: dict, update_dict: dict, upsert=False, client=None):
    if not client:
        client = connect_to_mongodb()
    collection = get_database("your_database", client)[collection_name]
    result = collection.update_one(filter_dict, {"$set": update_dict}, upsert=upsert)
    return result.modified_count

def delete_document(collection_name: str, filter_dict: dict, client=None):
    if not client:
        client = connect_to_mongodb()
    collection = get_database("your_database", client)[collection_name]
    result = collection.delete_one(filter_dict)
    return result.deleted_count

现在你可以通过`query_data()`, `insert_document()`, `update_document()`, 或者`delete_document()`这样的封装函数来进行关键字操作。