import pymongo
# 创建链接
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
# 遍历所有库
dblist = myclient.list_database_names()
print(dblist)
# 创建数据库
mydb = myclient["runoobdb"]
# 便利所有集合
collist = mydb. list_collection_names()
# 创建集合
mycol = mydb["sites"]


def insert(collect):
    mydict = { "name": "RUNOOB", "alexa": "10000", "url": "https://www.runoob.com" }
    x = collect.insert_one(mydict) 


def find(collect,type:int):
    # 1表示查询一条，2表示查询所有。3表示查询指定字段
    if type == 1:
        x = collect.find_one()
    if type == 2:
        for i in collect.find():
            print(i)