作業:
- 瞭解ajax加載
- 通過chrome的開發者工具,監控網絡請求,並分析
- 用selenium完成爬蟲
- 具體流程如下: 用selenium爬取https://news.qq.com/ 的熱點精選
疑問:
- 怎麼判斷一個url請求獲取的數據是通過ajax獲取的,怎麼知道這個真實的url?
- ajax獲取的數據獲取有什麼竅門嗎?
- Beautiful Soup, etree, xpath 怎麼更靈活的混用?
代碼:(沒有達到要求)
def get_page_source():
# driver = webdriver.Chrome(".chromedriver.exe")
driver = webdriver.Chrome()
driver.get("https://news.qq.com/")
time.sleep(2)
page_source = driver.page_source
soup = BeautifulSoup(page_source)
# print(soup.prettify())
ele_list = soup.select('.detail > h3 > a')
# print(ele_list)
for ele in ele_list:
print(type(str(ele)), str(ele))
# print(etree.HTML(str(ele)).xpath('text()'))
get_page_source()