1 conda介绍 conda是一个python的包管理器,用来管理、安装、更新python的包和相关的依赖。另外,conda可以为特定任务创建独立的环境,每个环境中可以只安装需要…
一、项目需求 使用Scrapy爬取链家网中苏州市二手房交易数据并保存于CSV文件中 要求: 房屋面积、总价和单价只需要具体的数字,不需要单位名称。 删除字段不全的房屋数据,如有的房…
目录 一、常见模型分类 1.1、循环服务器模型 1.2、IO并发模型 1.3、多进程/线程网络并发模型 二、基于fork的多进程网络并发模型 三、基于threading的多线程网络…
目录一、jieba库的安装二、jieba三种模式的使用三、jieba 分词简单应用四、扩展:英文单词统计jieba库是一款优秀的 Python 第三方中文分词库,jieba 支持三…
笛卡尔坐标系 游戏离不开坐标,我们来康康pygame中坐标是如何设立的吧~ 窗口左上角坐标(0,0),横轴正向向右,纵轴正向向下 实际效果 碰到边框就返回(其实是小球碰撞实验,我不…
python使用梯度下降和牛顿法寻找Rosenbrock函数最小值实例
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