python爬取微博数据_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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持python博客。