Python网络爬虫之制作股票数据定向爬虫 以及爬取的优化 可以显示进度条！

Python网络爬虫之制作股票数据定向爬虫 以及爬取的优化 可以显示进度条！

候选网站： 新浪股票：​​​百度股票：​​获取股票列表 2. 根据列表信息到百度获取个股信息2，根据列表信息到百度获取个股信息 3. 将结果存储

考虑用字典作为数据容器进行存储！

火狐浏览器可以查看源代码，蓝色的IE浏览器就会出现乱码：

火狐的:

因为a标签，太多所以正则表达式匹配比较困难。

可用try except来解决！

[s]：表示s。[hz]：表示h z。后面是随意6个数。

SH:

SZ:

优化：

r.encoding:仅从头部获得r.apparent_encoding:是从全文获得的。r.apparent_encoding:是从全文获得的。

优化就是将编码直接给代码，另外一个就是显示进度。

下面就是代码部分啦：

最初的代码：(真长)

import requestsfrom bs4 import BeautifulSoupimport tracebackimport redef getHTMLText(url): try: r = requests.get(url, timeout = 30) 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({'股票名称':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 = valurList[i].text infoDict[key] = val with open(fpath, 'a', encoding='utf-8') as f: f.write(str(infoDict) + '\n') except: traceback.print_exc() continuedef main(): stock_list_url = ' stock_info_url = ' output_file = 'D:\234.txt' slist = [] getStockList(slist, stock_list_url) getStockInfo(slist, stock_info_url, output_file)main()

代码执行结果;

优化后的代码：

import requestsfrom bs4 import BeautifulSoupimport tracebackimport redef getHTMLText(url,code='utf-8'):#默认的是utf-8 try: r = requests.get(url, timeout = 30) r.raise_for_status() r.encoding = code#直接赋值 return r.text except: return ""def getStockList(lst, stockURL): html = getHTMLText(stockURL,'GB2312')#已经查询过啦！ 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): count = 0 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({'股票名称':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 = valurList[i].text infoDict[key] = val with open(fpath, 'a', encoding='utf-8') as f: f.write(str(infoDict) + '\n') count = count +1 print('\r当前速度：{:.2f}%'.format(count*100/len(lst)),end=' ') except: count = count +1 print('\r当前速度：{:.2f}%'.format(count*100/len(lst)),end=' ') traceback.print_exc() continuedef main(): stock_list_url = ' stock_info_url = ' output_file = 'D:\234.txt' slist = [] getStockList(slist, stock_list_url) getStockInfo(slist, stock_info_url, output_file)main()

提前给出了编码方式以及可以显示进度条的代码 给出编码方式的代码：

def getHTMLText(url,code='utf-8'):#默认的是utf-8 try: r = requests.get(url, timeout = 30) r.raise_for_status() r.encoding = code#直接赋值 return r.text except: return ""def getStockList(lst, stockURL): html = getHTMLText(stockURL,'GB2312')#已经查询过啦！ 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

照片：

（如果不是utf-8，就要提前给替换掉！）

可以显示进度条的代码

def getStockInfo(lst, stockURL, fpath): count = 0 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({'股票名称':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 = valurList[i].text infoDict[key] = val with open(fpath, 'a', encoding='utf-8') as f: f.write(str(infoDict) + '\n') count = count +1 print('\r当前速度：{:.2f}%'.format(count*100/len(lst)),end=' ') except: count = count +1 print('\r当前速度：{:.2f}%'.format(count*100/len(lst)),end=' ') traceback.print_exc() continue

照片：

不过，显示进度在IDLE那里不可以显示。

但是最后我也没成功有文件生成以及显示进度条，算啦。先去吃饭啦~

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