//python
1.连接
client=pymongo.MongoClient("localhost", 27017)
2.#获取数据库 test
db=client.test
3.#获取数据库集合
stu=db.stu
4.打印集合个数
print(stu.count())
5.插入
s1 = {'name': 'allen', 'age': 18}
#查获取id
s1_id = stu.insert_one(s1).inserted_id
6.打印 id
print(s1_id)
7.查找一行
temp=stu.find_one(s1)
print(temp) //print(type(temp)) <class 'dict'>
{'_id': ObjectId('5ae034dc1d41c8293e8dec8d'), 'name': 'allen', 'age': 18}
8.查找所有
print(stu.find(s2)) //注意在 python 中返回的是对象<class 'pymongo.cursor.Cursor'>
9.对象转成 list
print(list(stu.find())) //stu是个集合
mongodb is simple to use
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