网站开发ssh,购物网站开发小结,工业设计专业就业前景怎么样,请人开发网站多少钱文章目录 selenium爬虫——以爬取澎湃新闻某搜索结果为例前言需要导入的包需要避雷的点webdriver的版本要与浏览器一致如果使用爬虫打开了新网页#xff0c;要记得跳转XPath和selector都可以直接复制爬取多网页时记得try打入word时调整字体的问题 完整程序扩展爬取效果 seleni… 文章目录 selenium爬虫——以爬取澎湃新闻某搜索结果为例前言需要导入的包需要避雷的点webdriver的版本要与浏览器一致如果使用爬虫打开了新网页要记得跳转XPath和selector都可以直接复制爬取多网页时记得try打入word时调整字体的问题 完整程序扩展爬取效果 selenium爬虫——以爬取澎湃新闻某搜索结果为例
前言
本程序致力于实现以下目标 1爬取澎湃新闻关于“反腐”的全部文章内容 2按标题、链接将其整理到excel中 3将标题和文章整合到一个word文档中。 许久没有正经写过了有些生疏代码耦合度蛮高的所幸目标达成了。
需要导入的包
import time
import docx
import xlwt
from docx.oxml.ns import qn
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.action_chains import ActionChains需要避雷的点
webdriver的版本要与浏览器一致
如果用的是google chrome可以在这里找到新版本的driver 其他浏览器的话直接百度就能找到。
如果使用爬虫打开了新网页要记得跳转
一开始不知道这一点试了半天都定位不到要爬取的元素结果最后发现一直没跳转到第二个页面上那在第一个页面上当然定位不到了……跳转的代码如下
new_window driver.window_handles[1] #找第二个窗口
driver.switch_to.window(new_window) #切换到新窗口
driver.refresh() #刷新XPath和selector都可以直接复制
复制过程如下图所示比自己写方便多了。
爬取多网页时记得try
比如这次爬取的澎湃新闻的文章有些链接点进去是视频是我们所不需要的定位的位置也不一样极有可能会报错中断。这时就需要try-except语句来帮助我们跳过了。
try:x_path//main/div[4]/div[1]/div[1]/div/h1titledriver.find_element(By.XPATH, x_path)x_path //main/div[4]/div[1]/div[1]/div/div[2]articledriver.find_element(By.XPATH, x_path)print(title.text)print(article.text)file.add_paragraph(article.text)
except:print(非文字)打入word时调整字体的问题
具体程序如下
for para in file.paragraphs:for run in para.runs:run.font.size docx.shared.Pt(10) #设置字体大小为10run.font.name Times New Roman #英文run._element.rPr.rFonts.set(qn(w:eastAsia), u楷体) # 中文值得注意的是中文的字体前面最好加一个u而且qn需要单独导包
from docx.oxml.ns import qn完整程序
import time
import docx
import xlwt
from docx.oxml.ns import qn
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.action_chains import ActionChains
def main():driver webdriver.Edge()driver.get(https://www.thepaper.cn/)time.sleep(1)searchdriver.find_element(By.TAG_NAME,input)search.send_keys(反腐)time.sleep(1)x_path//main/div/div/div/div/div/div/div/spansend_buttondriver.find_element(By.XPATH,x_path)ActionChains(driver).move_to_element(send_button).click(send_button).perform()time.sleep(1)x_path//main/div[3]/div[1]/div/div[2]/div/ul/li[2]send_buttondriver.find_element(By.XPATH,x_path)ActionChains(driver).move_to_element(send_button).click(send_button).perform()time.sleep(1)last_height driver.execute_script(return document.body.scrollHeight) # 获取当前页面的高度driver.execute_script(window.scrollTo(0, document.body.scrollHeight);)time.sleep(2)driver.execute_script(window.scrollTo(0, document.body.scrollHeight/2);)last_height driver.execute_script(return document.body.scrollHeight)while True: # 模拟下拉操作直到滑动到底部driver.execute_script(window.scrollTo(0, document.body.scrollHeight);) # 模拟下拉操作time.sleep(2) # 等待页面加载new_height driver.execute_script(return document.body.scrollHeight) # 获取当前页面的高度if new_height last_height: # 判断是否已经到达页面底部breaklast_height new_heightx_path//main/div[3]/div[1]/div/div/div/ul/li/div/anamesdriver.find_elements(By.XPATH,x_path)name_text[]name_href[]num-1for name in names:name_text.append(name.text)name_href.append(name.get_attribute(href))numnum1print(name.text)print(name.get_attribute(href))filedocx.Document() #创建docx对象workbook xlwt.Workbook()sheet1 workbook.add_sheet(sheet1, cell_overwrite_okTrue)sheet1.write(0,0,标题)sheet1.write(0,1,链接)for i in range(num1):print(name_text[i])print(name_href[i])addressname_href[i]driver.get(address)file.add_paragraph(name_text[i])sheet1.write(i1,0,name_text[i])sheet1.write(i 1, 1, name_href[i])try:x_path//main/div[4]/div[1]/div[1]/div/h1titledriver.find_element(By.XPATH, x_path)x_path //main/div[4]/div[1]/div[1]/div/div[2]articledriver.find_element(By.XPATH, x_path)print(title.text)print(article.text)file.add_paragraph(article.text)except:print(非文字)for para in file.paragraphs:for run in para.runs:run.font.size docx.shared.Pt(10) #设置字体大小为10run.font.name Times New Roman #英文run._element.rPr.rFonts.set(qn(w:eastAsia), u楷体) # 中文file.save(crawlerResult.docx)workbook.save(./crawlerResult.xls)if __name____main__:main()扩展
现将功能扩展如下 1爬取分别以“反腐”“从严治党”“廉洁”三个关键词搜索的文章内容并存储 2只保留不重复的部分。 为实现该功能需要一个字典来判断该文章是否已经被搜索过
dict{} #记录是否重复的字典
namesdriver.find_elements(By.XPATH,x_path)
for name in names:if name.text not in dict:name_text.append(name.text)name_href.append(name.get_attribute(href))numnum1print(name.text)print(name.get_attribute(href))dict[name.text]1另外发现爬取过程中可能出现某网址已经失效的情况在这种情况下需要跳过否则程序也会因执行不下去而异常结束此处使用try-except处理
try:addressname_href[i]driver.get(address)
except:print(网址失效)扩展之后的程序如下
import time
import docx
import xlwt
from docx.oxml.ns import qn
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.action_chains import ActionChains
def main():search_word[反腐,从严治党,廉洁]search_word_lensearch_word.__len__()dict{} #记录是否重复的字典num -1 #记录标题数search_word_num0 #搜索到第几个词name_text []name_href []for word in search_word:search_word_numsearch_word_num1driver webdriver.Edge()driver.get(https://www.thepaper.cn/)time.sleep(1)searchdriver.find_element(By.TAG_NAME,input)#print(word)search.send_keys(word)time.sleep(1)x_path//main/div/div/div/div/div/div/div/spansend_buttondriver.find_element(By.XPATH,x_path)ActionChains(driver).move_to_element(send_button).click(send_button).perform()time.sleep(1)x_path//main/div[3]/div[1]/div/div[2]/div/ul/li[2]send_buttondriver.find_element(By.XPATH,x_path)ActionChains(driver).move_to_element(send_button).click(send_button).perform()time.sleep(1)last_height driver.execute_script(return document.body.scrollHeight) # 获取当前页面的高度driver.execute_script(window.scrollTo(0, document.body.scrollHeight);)time.sleep(2)driver.execute_script(window.scrollTo(0, document.body.scrollHeight/2);)last_height driver.execute_script(return document.body.scrollHeight)while True: # 模拟下拉操作直到滑动到底部driver.execute_script(window.scrollTo(0, document.body.scrollHeight);) # 模拟下拉操作time.sleep(2) # 等待页面加载new_height driver.execute_script(return document.body.scrollHeight) # 获取当前页面的高度if new_height last_height: # 判断是否已经到达页面底部breaklast_height new_heightx_path//main/div[3]/div[1]/div/div/div/ul/li/div/anamesdriver.find_elements(By.XPATH,x_path)for name in names:if name.text not in dict:name_text.append(name.text)name_href.append(name.get_attribute(href))numnum1print(name.text)print(name.get_attribute(href))dict[name.text]1if search_word_num search_word_len:filedocx.Document() #创建docx对象workbook xlwt.Workbook()sheet1 workbook.add_sheet(sheet1, cell_overwrite_okTrue)sheet1.write(0,0,标题)sheet1.write(0,1,链接)for i in range(num1):print(name_text[i])print(name_href[i])try:addressname_href[i]driver.get(address)except:print(网址失效)file.add_paragraph(name_text[i])sheet1.write(i1,0,name_text[i])sheet1.write(i 1, 1, name_href[i])try:x_path//main/div[4]/div[1]/div[1]/div/h1titledriver.find_element(By.XPATH, x_path)x_path //main/div[4]/div[1]/div[1]/div/div[2]articledriver.find_element(By.XPATH, x_path)print(title.text)print(article.text)file.add_paragraph(article.text)except:print(非文字)for para in file.paragraphs:for run in para.runs:run.font.size docx.shared.Pt(10) #设置字体大小为10run.font.name Times New Roman #英文run._element.rPr.rFonts.set(qn(w:eastAsia), u楷体) # 中文file.save(crawlerResult.docx)workbook.save(./crawlerResult.xls)else:driver.close()print(dict.keys())
if __name____main__:main()爬取效果
word共2203页324万字 excel共1768行1767个文章标题第一行为表头
