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这篇文章主要为大家展示了“Python如何爬取某乎问答数”,内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下“Python如何爬取某乎问答数”这篇文章吧。
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前言
Python是个获取数据的小能手,所以这次希望能用它在*乎爬取一些的问题的回答数,练练手。
1.导入模块
import re from bs4 import BeautifulSoup import requests import time import json import pandas as pd import numpy as np
2.状态码
r = requests.get('https://github.com/explore') r.status_code
3. 爬取*乎
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4. beautifulsoup解析
s = requests.Session() start_url = 'https://www.zhihu.com/' html = s.get(url = start_url, headers = headers,cookies = cookies,timeout = 5) soup = BeautifulSoup(html.content) question = [] ## 名称 question_address = [] ## url temp1 = soup.find_all('div',class_='Card TopstoryItem TopstoryItem-isRecommend') for item in temp1: temp2 = item.find_all('div',itemprop="zhihu:question") # print(temp2) if temp2 != []: #### 存在专栏等情况,暂时跳过 question_address.append(temp2[0].find('meta',itemprop='url').get('content')) question.append(temp2[0].find('meta',itemprop='name').get('content'))
5. 存储信息
question_focus_number = [] #关注量 question_answer_number = [] # 回答量 for url in question_address: test = s.get(url = url,headers = headers,cookies = cookies,timeout = 5) soup = BeautifulSoup(test.content) info = soup.find_all('div',class_='QuestionPage')[0] # print(info) focus_number = info.find('meta',itemprop="answerCount").get('content') answer_number = info.find('meta',itemprop="zhihu:followerCount").get('content') question_focus_number.append(focus_number) question_answer_number.append(answer_number)
6. 整理信息并输出
question_info = pd.DataFrame(list(zip(question,question_focus_number,question_answer_number)),columns = ['问题名称','关注人数','回答人数'] for item in ['关注人数','回答人数']: question_info[item] = np.array(question_info[item],dtype = 'int') question_info.sort_values(by='关注人数',ascending = False)
输出:
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