conda离线创建虚拟环境
学校的服务器最近只能通上内网，连不上外网，安装包之类的都要下载whl文件或者源码编译安装，已经有三个弄好的环境了，怕把这三个搞坏了配起来就麻烦了。 离线配置方法： conda create n 虚拟环境名字 offline python=3.8 上面的语句重要的是 offline 代表是离线，其次是...
2022-07-07 07:15【JNash】
阅读更多ORM--数据库增删改查操作逻辑
1.数据获取逻辑 1.1 获取多条数据 https://img blog.csdnimg.cn/0fb5cf03b3254c03a89c9e832fa0a003.png https://img blog.csdnimg.cn/d14fa1f0183b4aa2aa5818174239c...
2022-07-07 07:17【chuntian_tester】
阅读更多ORM--分组查询，聚合查询，查询集QuerySet对象特性
1.分组查询 1.1.使用 QuerySet对象.values ‘父表主键id’ .annotate 聚合函数 ‘从表模型类名小写' 1.2 .会自动连接主从表，以外键字段作为分组条件 https://img blog.csdnimg.cn/55e7885f7cbd...
2022-07-07 07:17【chuntian_tester】
阅读更多ORM--逻辑关系与＆或；排序操作，更新记录操作，删除记录操作
1.逻辑关系 1.1 与 1.1.1 filter 中用逗号分隔多个过滤条件 qs = Projects.objects.filter id='xx', full name='xxx' ...
2022-07-07 07:17【chuntian_tester】
阅读更多ORM--查询类型，关联查询
ORM框架中，会给每一个模型类中的主键设置一个别名：pk models.Projects.objects.filter id=2 等效于models.Projects.objects.filter pk=2 1.filter 和exclude 查询类型 exclu...
2022-07-07 07:17【chuntian_tester】
阅读更多ORM模型--数据记录的创建操作，查询操作
1.数据库表记录的创建 1.1 通过模型类名 字段1=值1,字段2=值2.。。 .save 新增记录 https://img blog.csdnimg.cn/e6f210445705426786f82fde4c7c187a.png https://img blog.csdnimg.c...
2022-07-07 07:17【chuntian_tester】
阅读更多ORM模型--关联字段，抽象模型类
1.关联字段 表与表之间的关系分为： 一对一关系：如学生表与学生详细信息表之间的关系，学生表中一个学生在学生信息表 中只有一条对应关系记录 ...
2022-07-07 07:17【chuntian_tester】
阅读更多【ORM框架】
Django ORM框架操作数据库 Django ORM框架 Django ORM 1 定义 2 步骤 6 样例 28 1.定义模型类 1 29 2.迁移 2 77 ORM对象构成 ORM 96 全局配置文件settings.py中配置数据库 settingspy 103 ORM修改表中已有字段名...
2022-07-07 07:17【chuntian_tester】
阅读更多request对象对请求体，请求头参数的解析
1.请求体参数解析： 1.1 GET请求 1.1.1 请求url中/?xxx xxx格式为查询字符串参数，通过request.GET获取请求参数 1.1.2 请求url中/xxx/2/xxx格式为路径参数，通过reque...
2022-07-07 07:17【chuntian_tester】
阅读更多Official media attention! The list of top 100 domestic digital collection platforms was released, and the industry accelerated the healthy development of compliance
https://img blog.csdnimg.cn/img convert/cedc6dc9de12eda8d82837b065194936.png 7 month 1 Japan , List of top 100 domestic digital collection platforms ...
2022-07-07 10:01【mxzmxz1】
阅读更多China's first electronic audio category "Yamano electronic audio" digital collection is on sale!
https://img blog.csdnimg.cn/img convert/f0a1c24e9a7e7ab913efa3df8499bbff.png Double LP Band Sun Lingsheng Yaolingjia 21st century space old m...
2022-07-07 10:01【mxzmxz1】
阅读更多The new activity of "the arrival of twelve constellations and goddesses" was launched
Twelve constellations goddess Online shopping “ Novice blind box ” The first phase of the pull-out activities came to a successful conclusion , Th...
2022-07-07 10:01【mxzmxz1】
阅读更多Why does the starting service report an error when installing MySQL? (operating system Windows)
3306 Failed to connect to MySQL Server 8.0.29 after 10 attempts. Ended configuration step: Starting the server Tried many times to uninstall and relo...
2022-07-07 10:01【CSDN Q & A】
阅读更多Web3.0 series distributed storage IPFs
background web3.0 Focus on decentralization , Return the data to the user , At present, the effective underlying storage is distributed storage ipf...
2022-07-07 10:01【Luchena】
阅读更多Introduction to energy Router: Architecture and functions for energy Internet
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2022-07-07 10:02【da..】
阅读更多The Himalaya web version will pop up after each pause. It is recommended to download the client solution
listen China Daily When learning English, I feel that the web version is easier to use , When the client reads English text, the height of the manusc...
2022-07-07 10:02【angangi】
阅读更多Phpcms realizes PC website access to wechat native payment
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2022-07-07 10:02【Lai Zhongbiao】
阅读更多Bean operation domain and life cycle
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2022-07-07 10:02【Youcan.】
阅读更多Win10 installation vs2015
VS2015 Download address and installation tutorial （ The illustration ） Blog of Ruike knowledge cloud CSDN Blog vs2015 'VS2015 Download address a...
2022-07-07 10:02【How to chase Capricorn】
阅读更多Using keras in tensorflow to build convolutional neural network
Application tensorflow Medium keras Build convolutional neural network Six steps 1、 Import tensorflow library import tensorflow.keras as keras 2...
2022-07-07 10:03【guluC】
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