Python 爬取豆瓣TOP250实战

学习爬虫之路，必经的一个小项目就是爬取豆瓣的TOP250了，首先我们进入TOP250的界面看看。

可以看到每部电影都有比较全面的简介。其中包括电影名、导演、评分等。

接下来，我们就爬取这些数据，并将这些数据制成EXCEL表格方便查看。

首先，我们用requests库请求一下该网页，并返回他的text格式。

请求并返回成功！

接下来，我们提取我们所需要的网页元素。

点击“肖申克救赎”的检查元素。

发现它在div class = "hd" -> span class = "title"里，所以我们import beautifulsoup，来定位该元素。

同时，用相同的方法定位电影的评价人数和评分以及短评。

代码如下：

soup = BeautifulSoup(res.text, 'html.parser')

    names = []
    scores = []
    comments = []
    result = []
    #获取电影的所有名字
    res_name = soup.find_all('div',class_="hd")
    for i in res_name:
        a=i.a.span.text
        names.append(a)

    #获取电影的评分
    res_scores = soup.find_all('span',class_='rating_num')
    for i in res_scores:
        a=i.get_text()
        scores.append(a)

    #获取电影的短评
    ol = soup.find('ol', class_='grid_view')
    for i in ol.find_all('li'):

        info = i.find('span', attrs={'class': 'inq'})  # 短评
        if info:
            comments.append(info.get_text())
        else:
            comments.append("无")

    return names,scores,comments

Ok，现在，我们所需要的数据都存在三个列表里面，names,scores,comments。

我们将这三个列表存入EXCEL文件里，方便查看。

调用WorkBook方法

wb = Workbook()
    filename = 'top250.xlsx'
    ws1 = wb.active
    ws1.title = 'TOP250'
    for (i, m, o) in zip(names,scores,comments):
        col_A = 'A%s' % (names.index(i) + 1)
        col_B = 'B%s' % (names.index(i) + 1)
        col_C = 'C%s' % (names.index(i) + 1)
        ws1[col_A] = i
        ws1[col_B] = m
        ws1[col_C] = o
    wb.save(filename=filename)

运行结束后，会生成一个.xlsx的文件，我们来看看效果：

Very Beatuful！以后想学习之余想放松一下看看好的电影，就可以在上面直接查找啦。

以下是我的源代码：

import requests
from bs4 import BeautifulSoup
from openpyxl import Workbook

def open_url(url):
    res = requests.get(url)
    return res


def get_movie(res):
    soup = BeautifulSoup(res.text, 'html.parser')

    names = []
    scores = []
    comments = []
    result = []
    #获取电影的所有名字
    res_name = soup.find_all('div',class_="hd")
    for i in res_name:
        a=i.a.span.text
        names.append(a)

    #获取电影的评分
    res_scores = soup.find_all('span',class_='rating_num')
    for i in res_scores:
        a=i.get_text()
        scores.append(a)

    #获取电影的短评
    ol = soup.find('ol', class_='grid_view')
    for i in ol.find_all('li'):

        info = i.find('span', attrs={'class': 'inq'})  # 短评
        if info:
            comments.append(info.get_text())
        else:
            comments.append("无")

    return names,scores,comments



def get_page(res):
    soup = BeautifulSoup(res.text,'html.parser')
     #获取页数
    page_num = soup.find('span',class_ ='next').previous_sibling.previous_sibling.text
    return int(page_num)




def main():
    host = 'https://movie.douban.com/top250'
    res = open_url(host)
    pages = get_page(res)
    #print(pages)
    names =[]
    scores = []
    comments = []
    for i in range(pages):
        url = host + '?start='+ str(25*i)+'&filter='
        #print(url)
        result = open_url(url)
        #print(result)
        a,b,c = get_movie(result)
        #print(a,b,c)
        names.extend(a)
        scores.extend(b)
        comments.extend(c)
    # print(names)
    # print(scores)
    # print(comments)
    wb = Workbook()
    filename = 'top250.xlsx'
    ws1 = wb.active
    ws1.title = 'TOP250'
    for (i, m, o) in zip(names,scores,comments):
        col_A = 'A%s' % (names.index(i) + 1)
        col_B = 'B%s' % (names.index(i) + 1)
        col_C = 'C%s' % (names.index(i) + 1)
        ws1[col_A] = i
        ws1[col_B] = m
        ws1[col_C] = o
    wb.save(filename=filename)

if __name__ == '__main__':
    main()