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目录

1,安装pymongo库

​2，链接数据库

3，排序

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1,安装pymongo库

root@ubuntu-jason:~# pip install pymongo
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting pymongo
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/a6/e5/fb665829198cc6447f516c420d30cf90653514b7fd4656a60339e655dcb5/pymongo-4.1.1-cp36-cp36m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (462 kB)
     |████████████████████████████████| 462 kB 817 kB/s            
Installing collected packages: pymongo
Successfully installed pymongo-4.1.1

​2，链接数据库

创建数据库连接需要使用MongoClient对象，并且指定连接的IP地址，端口号，创建的数据库名。

from pymongo import MongoClient


def mongodb_init01():
    """数据库连接方式1"""
    client = MongoClient(host='127.0.0.1', port=27017)
    print(client)


def mongodb_init02():
    """数据库连接方式2"""
    uri = "mongodb://{}:{}".format('127.0.0.1', 27017)
    client = MongoClient(uri)
    print(client)


if __name__ == '__main__':
    mongodb_init01()
    mongodb_init02()

3，排序

sort()方法可以指定升序或者降序排序

第一个参数为要排序的字段，第二个字段指定排序规则，1为升序，-1为降序，默认为升序

from pymongo import MongoClient

client = MongoClient(host='127.0.0.1', port=27017, tz_aware=True)

# 创建新的数据库
new_database = client.new_database

# 创建一个新的集合
new_collection = new_database.new_collection

mylist = [
    {"name": "张飞", "hometown": "蜀国", "age": 30, "sex": "男"},
    {"name": "关羽", "hometown": "蜀国", "age": 40, "sex": "男"},
    {"name": "刘备", "hometown": "蜀国", "age": 50, "sex": "男"}
]

# 使用insert_many插入多条数据
x = new_collection.insert_many(mylist)

mydoc = new_collection.find().sort("name")
for x in mydoc:
    print(x)

电脑没有安装数据库，没办法演示了。