網絡爬蟲之實戰 4-2 股票數據定向爬蟲

文章截圖均來自中國大學mooc Python網絡爬蟲與信息提取的教程，以上僅作爲我的個人學習筆記。下面是教程鏈接：

https://www.icourse163.org/learn/BIT-1001870001?tid=1450316449#/learn/content?type=detail&id=1214620493&cid=1218397635&replay=true

---

目的：獲得上交所和深交所所有的股票名稱和交易信息

輸出：保存到文件中

技術路線：requests-bs4-re

候選網站：靜態的：目前還沒有找到，老師提供的界面現在用不了了

選取方法：瀏覽器F12

例子1：新浪股票

程序結構設計步驟：

代碼：

#CrawBaiduStocksA.py
import requests
from bs4 import BeautifulSoup
import traceback
import re
 
def getHTMLText(url):
    try:
        r = requests.get(url)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""
 
def getStockList(lst, stockURL):
    html = getHTMLText(stockURL)
    soup = BeautifulSoup(html, 'html.parser') 
    a = soup.find_all('a')
    for i in a:
        try:
            href = i.attrs['href']
            lst.append(re.findall(r"[s][hz]\d{6}", href)[0])
        except:
            continue
 
def getStockInfo(lst, stockURL, fpath):
    for stock in lst:
        url = stockURL + stock + ".html"
        html = getHTMLText(url)
        try:
            if html=="":
                continue
            infoDict = {}
            soup = BeautifulSoup(html, 'html.parser')
            stockInfo = soup.find('div',attrs={'class':'stock-bets'})
 
            name = stockInfo.find_all(attrs={'class':'bets-name'})[0]
            infoDict.update({'股票名稱': name.text.split()[0]})
             
            keyList = stockInfo.find_all('dt')
            valueList = stockInfo.find_all('dd')
            for i in range(len(keyList)):
                key = keyList[i].text
                val = valueList[i].text
                infoDict[key] = val
             
            with open(fpath, 'a', encoding='utf-8') as f:
                f.write( str(infoDict) + '\n' )
        except:
            traceback.print_exc()
            continue
 
def main():
    stock_list_url = 'https://quote.eastmoney.com/stocklist.html'
    stock_info_url = 'https://gupiao.baidu.com/stock/'
    output_file = 'D:/BaiduStockInfo.txt'
    slist=[]
    getStockList(slist, stock_list_url)
    getStockInfo(slist, stock_info_url, output_file)
 
main()

注意：現在這個用不了了，但是可以學習下程序是如何實現requests-bs4-re這三個庫對於靜態html文件的解析、爬取、正則表達式的書寫規範。