小编典典

如何使用不变的网址抓取多个页面-Python

selenium

我正在尝试抓取此网站:http :
//data.eastmoney.com/xg/xg/

到目前为止,我已经使用selenium执行javascript并抓取了表格。但是,现在我的代码仅使我获得第一页。我想知道是否有一种方法可以访问其他17个页面,因为当我单击下一页时,URL不会更改,因此我不能每次都遍历另一个URL

下面是我到目前为止的代码:

from selenium import webdriver
import lxml
from bs4 import BeautifulSoup
import time

def scrape():
    url = 'http://data.eastmoney.com/xg/xg/'
    d={}
    f = open('east.txt','a')
    driver = webdriver.PhantomJS()
    driver.get(url)
    lst = [x for x in range(0,25)]
    htmlsource = driver.page_source
    bs = BeautifulSoup(htmlsource)
    heading = bs.find_all('thead')[0]
    hlist = []
    for header in heading.find_all('tr'):
        head = header.find_all('th')
    for i in lst:
        if i!=2:
            hlist.append(head[i].get_text().strip())
    h = '|'.join(hlist)
    print h
    table = bs.find_all('tbody')[0]
    for row in table.find_all('tr'):
        cells = row.find_all('td')
        d[cells[0].get_text()]=[y.get_text() for y in cells]
    for key in d:
        ret=[]
        for i in lst:
            if i != 2:
                ret.append(d.get(key)[i])
        s = '|'.join(ret)
        print s

if __name__ == "__main__":  
    scrape()

还是我每次单击后都可以使用webdriver.Chrome()而不是PhantomJS来通过浏览器单击下一步,然后在新页面上运行Python?


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2020-06-26

共1个答案

小编典典

这不是要与之交互的琐碎页面,需要使用“ 显式等待”来等待“加载”指示器的隐形。

这是可以用作起点的完整且可行的实现:

# -*- coding: utf-8 -*-
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

from selenium import webdriver
import time

url = "http://data.eastmoney.com/xg/xg/"
driver = webdriver.PhantomJS()
driver.get(url)

def get_table_results(driver):
    for row in driver.find_elements_by_css_selector("table#dt_1 tr[class]"):
        print [cell.text for cell in row.find_elements_by_tag_name("td")]


# initial wait for results
WebDriverWait(driver, 10).until(EC.invisibility_of_element_located((By.XPATH, u"//th[. = '加载中......']")))


while True:
    # print current page number
    page_number = driver.find_element_by_id("gopage").get_attribute("value")
    print "Page #" + page_number

    get_table_results(driver)

    next_link = driver.find_element_by_link_text("下一页")
    if "nolink" in next_link.get_attribute("class"):
        break

    next_link.click()
    time.sleep(2)  # TODO: fix?

    # wait for results to load
    WebDriverWait(driver, 10).until(EC.invisibility_of_element_located((By.XPATH, u"//img[contains(@src, 'loading')]")))

    print "------"

想法是要有一个无限循环,只有当“下一页”链接被禁用(没有更多可用页面)时,我们才会退出。在每次迭代中,获取表结果(为示例起见,在控制台上打印),单击下一个链接,然后等待出现在网格顶部的“正在加载”旋转圆的隐形性。

2020-06-26