【Python爬虫】requests爬取新浪微博评论代码

• 环境：WIN10+Python3.6

# 完整爬取微博评论程序，只须要修改微博id便可
import requests
import json
import re
#爬取微博评论写入weibo_comment.txt
def get_comment(weibo_id, url, headers, number):
    count = 0
    fp = open("weibo_comment_"+str(weibo_id)+".txt", "a", encoding="utf8")
    #判断爬取数目是否足够
    while count<number:
        #判断是不是第一组，第一组不加max_id
        if count == 0:
            print('是第一组')
            try:
                url = url + weibo_id + '&mid=' + weibo_id +'&max_id_type=0'
                web_data = requests.get(url, headers = headers)
                js_con = web_data.json()
                #获取链接下一页评论的max_id
                max_id = js_con['data']['max_id']
                print(max_id)
                comments_list = js_con['data']['data']
                for commment_item in comments_list:
                    comment = commment_item["text"]
                    #删除表情符号
                    label_filter = re.compile(r'</?\w+[^>]*>', re.S)
                    comment = re.sub(label_filter, '', comment)
                    fp.write(comment)
                    count += 1
                    print("已获取"+str(count)+"条评论。")
            except Exception as e:
                print(str(count) + "遇到异常")
                continue
        else:
            print('不是第一组')
            try:
                url = url + weibo_id + 'max_id=' + str(max_id) + '&max_id_type=0'
                web_data = requests.get(url, headers = headers)
                js_con = web_data.json()
                #获取链接下一页评论的max_id
                max_id = js_con['data']['max_id']
                comments_list = js_con['data']['data']
                for commment_item in comments_list:
                    comment = commment_item["text"]
                    #删除表情符号
                    label_filter = re.compile(r'</?\w+[^>]*>', re.S)
                    comment = re.sub(label_filter, '', comment)
                    fp.write(comment)
                    count += 1
                    print("已获取"+str(count)+"条评论。")
            except Exception as e:
                print(str(count) + "遇到异常")
                continue
    fp.close()
    
if __name__ == "__main__":
    headers = {
        'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'
    }
    url = 'https://m.weibo.cn/comments/hotflow?id='
    weibo_id = '4363505468007923' #微博id
    number = 400 #爬取评论量
    get_comment(weibo_id,url,headers,number)

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