Python selenium爬取微博数据代码实例
爬取某人的微博数据,把某人所有时间段的微博数据都爬下来。
具体思路:
创建driver-----get网页----找到并提取信息-----保存csv----翻页----get网页(开始循环)----...----没有“下一页”就结束,
用了while True,没用自我调用函数
嘟大海的微博:https://weibo.com/u/1623915527
办公室小野的微博:https://weibo.com/bgsxy
代码如下
from selenium import webdriver from selenium.webdriver.common.keys import Keys import csv import os import time #只有这2个参数设置,想爬谁的微博数据就在这里改地址和目标csv名称就行 weibo_url = 'https://weibo.com/bgsxy?profile_ftype=1&is_all=1#_0' csv_name = 'bgsxy_allweibo.csv' def start_chrome(): print('开始创建浏览器') driver = webdriver.Chrome(executable_path='C:/Users/lori/Desktop/python52project/chromedriver_win32/chromedriver.exe') driver.start_client() return driver def get_web(url): #获取网页,并下拉到最底部 print('开始打开指定网页') driver.get(url) time.sleep(7) scoll_down() time.sleep(5) def scoll_down(): # 滚轮下拉到最底部 html_page = driver.find_element_by_tag_name('html') for i in range(7): print(i) html_page.send_keys(Keys.END) time.sleep(1) def get_data(): print('开始查找并提取数据') card_sel = 'div.WB_cardwrap.WB_feed_type' time_sel = 'a.S_txt2[node-type="feed_list_item_date"]' source_sel = 'a.S_txt2[suda-uatrack="key=profile_feed&value=pubfrom_guest"]' content_sel = 'div.WB_text.W_f14' interact_sel = 'span.line.S_line1>span>em:nth-child(2)' cards = driver.find_elements_by_css_selector(card_sel) info_list = [] for card in cards: time = card.find_elements_by_css_selector(time_sel)[0].text #虽然有可能在一个card中有2个time元素,我们取第一个就对 if card.find_elements_by_css_selector(source_sel): source = card.find_elements_by_css_selector(source_sel)[0].text else: source = '' content = card.find_elements_by_css_selector(content_sel)[0].text link = card.find_elements_by_css_selector(time_sel)[0].get_attribute('href') trans = card.find_elements_by_css_selector(interact_sel)[1].text comment = card.find_elements_by_css_selector(interact_sel)[2].text like = card.find_elements_by_css_selector(interact_sel)[3].text info_list.append([time,source,content,link,trans,comment,like]) return info_list def save_csv(info_list,csv_name): csv_path = './' + csv_name print('开始写入csv文件') if os.path.exists(csv_path): with open(csv_path,'a',newline='',encoding='utf-8-sig') as f: #newline=''避免空行;encoding='utf-8-sig'比utf8牛,保存中文没问题 writer = csv.writer(f) writer.writerows(info_list) else: with open(csv_path,'w+',newline='',encoding='utf-8-sig') as f: writer = csv.writer(f) writer.writerow(['发布时间','来源','内容','链接','转发数','评论数','点赞数']) writer.writerows(info_list) time.sleep(5) def next_page_url(): next_page_sel = 'a.page.next' next_page_ele = driver.find_elements_by_css_selector(next_page_sel) if next_page_ele: return next_page_ele[0].get_attribute('href') else: return None driver = start_chrome() input('请在chrome中登录weibo.com') # 暂停程序,手动登录weibo.com while True: get_web(weibo_url) info_list = get_data() save_csv(info_list,csv_name) if next_page_url(): weibo_url = next_page_url() else: print('爬取结束') break
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