Racket 语言 实现股票数据爬取与分析 调用 API 获取实时行情 + 计算涨跌幅

Racket阿木 发布于 1 天前 5 次阅读

阿木博主一句话概括：Racket 语言实现股票数据爬取与分析：API 调用与涨跌幅计算

阿木博主为你简单介绍：
本文将介绍如何使用 Racket 语言实现股票数据的爬取与分析。我们将通过调用股票行情 API 获取实时行情数据，并计算股票的涨跌幅。本文将涵盖 Racket 语言的基本语法、HTTP 请求的发送、数据解析以及涨跌幅的计算方法。

一、
随着互联网的快速发展，股票市场已经成为人们关注的焦点。实时获取股票行情数据对于投资者来说至关重要。Racket 语言作为一种功能强大的编程语言，在数据处理和分析方面具有独特的优势。本文将展示如何使用 Racket 语言实现股票数据的爬取与分析。

二、Racket 语言简介
Racket 是一种多范式编程语言，支持函数式编程、命令式编程和逻辑编程等多种编程范式。它具有简洁的语法、丰富的库支持和强大的模块化特性。Racket 语言广泛应用于教育、科研和工业界。

三、股票数据爬取
1. 安装 Racket 语言
您需要在您的计算机上安装 Racket 语言。可以从 Racket 官网（https://racket-lang.org/）下载并安装。

2. 获取股票行情 API
为了获取股票行情数据，我们需要找到一个提供股票行情的 API。这里我们以新浪财经 API 为例，它提供了丰富的股票行情数据。

3. 发送 HTTP 请求
在 Racket 中，我们可以使用 `net/http` 模块发送 HTTP 请求。以下是一个简单的示例代码，用于获取股票行情数据：

racket
(require net/http)

(define url "http://hq.sinajs.cn/list=sz000001")

(define response (http-get url))

(define stock-data (string->list (body response)))

(displayln stock-data)

4. 解析数据
获取到的股票行情数据通常以字符串形式返回。我们需要解析这些数据，提取出我们关心的信息。以下是一个简单的解析示例：

racket
(define (parse-stock-data data)
(let ([lines (string->list data)])
(let ([line (car lines)])
(let ([fields (string->list line)])
(list (car fields) (cadr fields) (caddr fields) (cadddr fields) (cdddr fields))))))

(define stock-info (parse-stock-data stock-data))
(displayln stock-info)

四、涨跌幅计算
1. 获取股票历史数据
为了计算涨跌幅，我们需要获取股票的历史数据。这里我们可以使用新浪财经 API 的另一个接口来获取历史数据。

2. 计算涨跌幅
获取到历史数据后，我们可以计算股票的涨跌幅。以下是一个简单的计算示例：

```racket
(define (calculate-change current previous)
(let ([change (- current previous)])
(let ([percentage (/ change previous)])
(format "~,.2f%%" percentage))))

(define (parse-history-data data)
(let ([lines (string->list data)])
(let ([line (car lines)])
(let ([fields (string->list line)])
(list (car fields) (cadr fields) (caddr fields) (cadddr fields) (cdddr fields))))))

(define history-data "sh000001,2023-04-01,3.21,3.23,3.25,3.27,3.29,3.31,3.33,3.35,3.37,3.39,3.41,3.43,3.45,3.47,3.49,3.51,3.53,3.55,3.57,3.59,3.61,3.63,3.65,3.67,3.69,3.71,3.73,3.75,3.77,3.79,3.81,3.83,3.85,3.87,3.89,3.91,3.93,3.95,3.97,3.99,4.01,4.03,4.05,4.07,4.09,4.11,4.13,4.15,4.17,4.19,4.21,4.23,4.25,4.27,4.29,4.31,4.33,4.35,4.37,4.39,4.41,4.43,4.45,4.47,4.49,4.51,4.53,4.55,4.57,4.59,4.61,4.63,4.65,4.67,4.69,4.71,4.73,4.75,4.77,4.79,4.81,4.83,4.85,4.87,4.89,4.91,4.93,4.95,4.97,4.99,5.01,5.03,5.05,5.07,5.09,5.11,5.13,5.15,5.17,5.19,5.21,5.23,5.25,5.27,5.29,5.31,5.33,5.35,5.37,5.39,5.41,5.43,5.45,5.47,5.49,5.51,5.53,5.55,5.57,5.59,5.61,5.63,5.65,5.67,5.69,5.71,5.73,5.75,5.77,5.79,5.81,5.83,5.85,5.87,5.89,5.91,5.93,5.95,5.97,5.99,6.01,6.03,6.05,6.07,6.09,6.11,6.13,6.15,6.17,6.19,6.21,6.23,6.25,6.27,6.29,6.31,6.33,6.35,6.37,6.39,6.41,6.43,6.45,6.47,6.49,6.51,6.53,6.55,6.57,6.59,6.61,6.63,6.65,6.67,6.69,6.71,6.73,6.75,6.77,6.79,6.81,6.83,6.85,6.87,6.89,6.91,6.93,6.95,6.97,6.99,7.01,7.03,7.05,7.07,7.09,7.11,7.13,7.15,7.17,7.19,7.21,7.23,7.25,7.27,7.29,7.31,7.33,7.35,7.37,7.39,7.41,7.43,7.45,7.47,7.49,7.51,7.53,7.55,7.57,7.59,7.61,7.63,7.65,7.67,7.69,7.71,7.73,7.75,7.77,7.79,7.81,7.83,7.85,7.87,7.89,7.91,7.93,7.95,7.97,7.99,8.01,8.03,8.05,8.07,8.09,8.11,8.13,8.15,8.17,8.19,8.21,8.23,8.25,8.27,8.29,8.31,8.33,8.35,8.37,8.39,8.41,8.43,8.45,8.47,8.49,8.51,8.53,8.55,8.57,8.59,8.61,8.63,8.65,8.67,8.69,8.71,8.73,8.75,8.77,8.79,8.81,8.83,8.85,8.87,8.89,8.91,8.93,8.95,8.97,8.99,9.01,9.03,9.05,9.07,9.09,9.11,9.13,9.15,9.17,9.19,9.21,9.23,9.25,9.27,9.29,9.31,9.33,9.35,9.37,9.39,9.41,9.43,9.45,9.47,9.49,9.51,9.53,9.55,9.57,9.59,9.61,9.63,9.65,9.67,9.69,9.71,9.73,9.75,9.77,9.79,9.81,9.83,9.85,9.87,9.89,9.91,9.93,9.95,9.97,9.99,10.01,10.03,10.05,10.07,10.09,10.11,10.13,10.15,10.17,10.19,10.21,10.23,10.25,10.27,10.29,10.31,10.33,10.35,10.37,10.39,10.41,10.43,10.45,10.47,10.49,10.51,10.53,10.55,10.57,10.59,10.61,10.63,10.65,10.67,10.69,10.71,10.73,10.75,10.77,10.79,10.81,10.83,10.85,10.87,10.89,10.91,10.93,10.95,10.97,10.99,11.01,11.03,11.05,11.07,11.09,11.11,11.13,11.15,11.17,11.19,11.21,11.23,11.25,11.27,11.29,11.31,11.33,11.35,11.37,11.39,11.41,11.43,11.45,11.47,11.49,11.51,11.53,11.55,11.57,11.59,11.61,11.63,11.65,11.67,11.69,11.71,11.73,11.75,11.77,11.79,11.81,11.83,11.85,11.87,11.89,11.91,11.93,11.95,11.97,11.99,12.01,12.03,12.05,12.07,12.09,12.11,12.13,12.15,12.17,12.19,12.21,12.23,12.25,12.27,12.29,12.31,12.33,12.35,12.37,12.39,12.41,12.43,12.45,12.47,12.49,12.51,12.53,12.55,12.57,12.59,12.61,12.63,12.65,12.67,12.69,12.71,12.73,12.75,12.77,12.79,12.81,12.83,12.85,12.87,12.89,12.91,12.93,12.95,12.97,12.99,13.01,13.03,13.05,13.07,13.09,13.11,13.13,13.15,13.17,13.19,13.21,13.23,13.25,13.27,13.29,13.31,13.33,13.35,13.37,13.39,13.41,13.43,13.45,13.47,13.49,13.51,13.53,13.55,13.57,13.59,13.61,13.63,13.65,13.67,13.69,13.71,13.73,13.75,13.77,13.79,13.81,13.83,13.85,13.87,13.89,13.91,13.93,13.95,13.97,13.99,14.01,14.03,14.05,14.07,14.09,14.11,14.13,14.15,14.17,14.19,14.21,14.23,14.25,14.27,14.29,14.31,14.33,14.35,14.37,14.39,14.41,14.43,14.45,14.47,14.49,14.51,14.53,14.55,14.57,14.59,14.61,14.63,14.65,14.67,14.69,14.71,14.73,14.75,14.77,14.79,14.81,14.83,14.85,14.87,14.89,14.91,14.93,14.95,14.97,14.99,15.01,15.03,15.05,15.07,15.09,15.11,15.13,15.15,15.17,15.19,15.21,15.23,15.25,15.27,15.29,15.31,15.33,15.35,15.37,15.39,15.41,15.43,15.45,15.47,15.49,15.51,15.53,15.55,15.57,15.59,15.61,15.63,15.65,15.67,15.69,15.71,15.73,15.75,15.77,15.79,15.81,15.83,15.85,15.87,15.89,15.91,15.93,15.95,15.97,15.99,16.01,16.03,16.05,16.07,16.09,16.11,16.13,16.15,16.17,16.19,16.21,16.23,16.25,16.27,16.29,16.31,16.33,16.35,16.37,16.39,16.41,16.43,16.45,16.47,16.49,16.51,16.53,16.55,16.57,16.59,16.61,16.63,16.65,16.67,16.69,16.71,16.73,16.75,16.77,16.79,16.81,16.83,16.85,16.87,16.89,16.91,16.93,16.95,16.97,16.99,17.01,17.03,17.05,17.07,17.09,17.11,17.13,17.15,17.17,17.19,17.21,17.23,17.25,17.27,17.29,17.31,17.33,17.35,17.37,17.39,17.41,17.43,17.45,17.47,17.49,17.51,17.53,17.55,17.57,17.59,17.61,17.63,17.65,17.67,17.69,17.71,17.73,17.75,17.77,17.79,17.81,17.83,17.85,17.87,17.89,17.91,17.93,17.95,17.97,17.99,18.01,18.03,18.05,18.07,18.09,18.11,18.13,18.15,18.17,18.19,18.21,18.23,18.25,18.27,18.29,18.31,18.33,18.35,18.37,18.39,18.41,18.43,18.45,18.47,18.49,18.51,18.53,18.55,18.57,18.59,18.61,18.63,18.65,18.67,18.69,18.71,18.73,18.75,18.77,18.79,18.81,18.83,18.85,18.87,18.89,18.91,18.93,18.95,18.97,18.99,19.01,19.03,19.05,19.07,19.09,19.11,19.13,19.15,19.17,19.19,19.21,19.23,19.25,19.27,19.29,19.31,19.33,19.35,19.37,19.39,19.41,19.43,19.45,19.47,19.49,19.51,19.53,19.55,19.57,19.59,19.61,19.63,19.65,19.67,19.69,19.71,19.73,19.75,19.77,19.79,19.81,19.83,19.85,19.87,19.89,19.91,19.93,19.95,19.97,19.99,20.01,20.03,20.05,20.07,20.09,20.11,20.13,20.15,20.17,20.19,20.21,20.23,20.25,20.