pymongo模块

Posted 2021-01-13 glh-ty

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一，pymongo模块的下载与使用

pip install pymongo

二，使用

1，连接

import pymongo

mongo_client = pymongo.MongoClient(host="127.0.0.1", port=27017)
mongo_db = mongo_client["day117"]

2，查

res = mongo_db.user.find()
print(res)  # <pymongo.cursor.Cursor object at 0x0000028DEAAD03C8>  类似生成器

for data in res:
    print(data)

res = mongo_db.user.find_one({"name": "mmm"})
print(res)
print(res.get("_id"))

3，增

# res = mongo_db.chat.insert_one({"sender": "glh", "chat": "今天天气怎么样？", "datatime": time.time()})  # 插入单条
# res = mongo_db.chat.insert_one({"sender": "tuling", "chat": "请问要查询哪所城市？", "datatime": time.time()})
# print(res, res.inserted_id)

# res = mongo_db.user.insert_many([{}, {}, {}])  # 插入多条
# print(res, res.inserted_ids)

4，改

res = mongo_db.user.update_one({"name": "mmm"}, {"$set": {"age": 888}})
print(res, res.modified_count)

res = mongo_db.user.update_many({"age": {"$gte": 18}}, {"$set": {"age": 789}})
print(res, res.modified_count)

5，删

res = mongo_db.user.delete_one({"$or": [{"name": "lll"}, {"name": "jjj"}]})
print(res, res.deleted_count)

res = mongo_db.user.delete_many({})  # 删除所有数据
print(res, res.deleted_count)