Question

我正在尝试从以下位置抓取中队的调度数据： https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9

我已经弄清楚了如何使用BeautifulSoup通过以下方式提取数据：

import urllib2
from urllib2 import urlopen
import bs4 as bs

url = 'https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9'
html = urllib2.urlopen(url).read()
soup = bs.BeautifulSoup(html, 'lxml')
table = soup.find('table')
print(table.text)

但是，该表隐藏在所选日期（如果不是当前日期）下，并且按下了“查看时间表”按钮。

如何修改我的代码以“按下”“查看时间表”按钮，以便随后可以抓取数据？如果代码还可以选择日期，则可加分！

我尝试使用：

import urllib2
from urllib2 import urlopen
import bs4 as bs
from selenium import webdriver

driver = webdriver.Chrome("/users/base/Downloads/chromedriver")
driver.get("https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9")
button = driver.find_element_by_id('btnViewSched')
button.click()

可以成功打开Chrome并“点击”按钮，但由于地址不变，因此无法从中抓取。

Answer 1

您可以使用纯selenium来获取时间表：

from selenium import webdriver

driver = webdriver.Chrome('chromedriver.exe')
driver.get("https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9")
button = driver.find_element_by_id('btnViewSched')
button.click()
print(driver.find_element_by_id('dgEvents').text)

输出：

TYPE VT Brief EDT RTB Instructor Student Event Hrs Remarks Location
Flight VT-9 07:45 09:45 11:15 JARVIS, GRANT M [LT] LENNOX, KEVIN I [ENS] BI4101 1.5 2 HR BRIEF MASS BRIEF  
Flight VT-9 07:45 09:45 11:15 MOYNAHAN, WILLIAM P [CDR] FINNERAN, MATTHEW P [1stLt] BI4101 1.5 2 HR BRIEF MASS BRIEF  
Flight VT-9 07:45 12:15 13:45 JARVIS, GRANT M [LT] TAYLOR, ADAM R [1stLt] BI4101 1.5 2 HR BRIEF MASS BRIEF @ 0745 W/ JARVIS MEI OPS  
Flight VT-9 07:45 12:15 13:45 MOYNAHAN, WILLIAM P [CDR] LOW, TRENTON G [ENS] BI4101 1.5 2 HR BRIEF MASS BRIEF @ 0745 W/ MOYNAHAN MEI OPS  
Watch VT-9   00:00 14:00 ANDERSON, LAURA [LT]   ODO (ON CALL) 14.0    
Watch VT-9   00:00 14:00 ANDERSON, LAURA [LT]   ODO (ON CALL) 14.0    
Watch VT-9   00:00 23:59 ANDERSON, LAURA [LT]   ODO (ON CALL) 24.0    
Watch VT-9   00:00 23:59 ANDERSON, LAURA [LT]   ODO (ON CALL) 24.0    
Watch VT-9   07:00 19:00   STUY, JOHN [LTJG] DAY IWO 12.0    
Watch VT-9   19:00 07:00   STRACHAN, ALLYSON [LTJG] IWO 12.0

Answer 2

当我读到您的问题时，您需要使用硒来抓取需要输入内容的.aspx页面。

阅读本文，它将帮助您scrap data for .aspx page with selenium

Answer 3

在“查看日程安排”上单击，使用相同的url请求但发送数据btnViewSched=View Schedule并发送令牌。下面的代码以地图格式列表的形式收集表格数据：

import requests
from bs4 import BeautifulSoup

headers = {
    'Connection': 'keep-alive',
    'Cache-Control': 'max-age=0',
    'Upgrade-Insecure-Requests': '1',
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) '
                  'Chrome/73.0.3683.86 Safari/537.36',
    'DNT': '1',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,'
              'application/signed-exchange;v=b3',
    'Accept-Encoding': 'gzip, deflate, br',
    'Accept-Language': 'ru,en-US;q=0.9,en;q=0.8,tr;q=0.7',
}
response = requests.get('https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9', headers=headers)
assert response.ok

page = BeautifulSoup(response.text, "lxml")
# get __VIEWSTATE, __EVENTVALIDATION and __VIEWSTATEGENERATOR for further requests
__VIEWSTATE = page.find("input", attrs={"id": "__VIEWSTATE"}).attrs["value"]
__EVENTVALIDATION = page.find("input", attrs={"id": "__EVENTVALIDATION"}).attrs["value"]
__VIEWSTATEGENERATOR = page.find("input", attrs={"id": "__VIEWSTATEGENERATOR"}).attrs["value"]

# View Schedule click set here
data = {
  '__EVENTTARGET': '',
  '__EVENTARGUMENT': '',
  '__VIEWSTATE': __VIEWSTATE,
  '__VIEWSTATEGENERATOR': __VIEWSTATEGENERATOR,
  '__EVENTVALIDATION': __EVENTVALIDATION,
  'btnViewSched': 'View Schedule',
  'txtNameSearch': ''
}
# request with params
response = requests.post('https://www.cnatra.navy.mil/scheds/schedule_data.aspx?sq=vt-9', headers=headers, data=data)
assert response.ok

page = BeautifulSoup(response.text, "lxml")
# get table headers to map as a keys in result
table_headers = [td.text.strip() for td in page.select("#dgEvents tr:first-child td")]
# get all rows, without table headers
table_rows = page.select("#dgEvents tr:not(:first-child)")

result = []
for row in table_rows:
    table_columns = row.find_all("td")

    # use map with results for row and add all columns as map (key:value)
    row_result = {}
    for i in range(0, len(table_headers)):
        row_result[table_headers[i]] = table_columns[i].text.strip()

    # add row_result to result list
    result.append(row_result)

for r in result:
    print(r)

print("the end")

示例输出：

{'TYPE'：'航班'，'VT'：'VT-9'，'Brief'：'07：45'，'EDT'：'09：45'，'RTB'：'11：15 ”，“讲师”：“ JARVIS，GRANT M [LT]”，“学生”：“ LENNOX，KEVIN I [ENS]”，“事件”：“ BI4101”，“小时”：“ 1.5”，“备注”： '2 HR Brief MASS Brief'，'Location'：''}

单击后刮取.aspx网站

3 个答案: