我的列表(f3)没有打印输出，并且一直给我StaleElementReferenceException？

Question

因此，在过去的一周里，我一直在研究这部分代码，我设法更好地理解了codelogic。为了让你知道:我试图在crunchbase上收集每个电动汽车公司的创始人信息(姓名，性别，学校信息)。我想我应该做的是创建不同的字典，因为一些信息在页面的不同部分。代码如下：

#imports
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import NoSuchElementException
from selenium.common.exceptions import StaleElementReferenceException
from selenium.common.exceptions import TimeoutException
import pandas as pd
import time

#driver path
PATH = "C:/Program Files (x86)\chromedriver.exe"
driver = webdriver.Chrome(PATH)

#access crunchbase ui
driver.get("https://www.crunchbase.com/search/organizations/field/organization.companies/categories/electric-vehicle")
driver.maximize_window()
time.sleep(5)
print(driver.title)
    
time.sleep(3)
   
#await element location

WebDriverWait(driver, 30).until(EC.presence_of_element_located((By.XPATH, ('//a[@aria-label="Next"][@aria-disabled="false"][@type="button"]'))))
    
#next page
page = driver.find_element_by_xpath('/html/body/chrome/div/mat-sidenav-container/mat-sidenav-content/div/search/page-layout/div/div/form/div[2]/results/div/div/div[1]/div/results-info/h3/a[2]')

company_list = [] ###create dictionary
   
counter = 0
for _ in range(2):
    if counter == 1:
        break
    counter += 1
    
    if page.is_displayed():
        
        time.sleep(25)
        
        #webscrape through iterations/rows
        all_rows = driver.find_elements_by_css_selector("grid-row")
                                                      
        for row in all_rows:
            companyname = row.find_element_by_xpath('.//*[@class="identifier-label"]')
            companyname.click()
            time.sleep(10)
            
            ###founder info
            founders = driver.find_element_by_css_selector("body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout:nth-child(3) > div > div > div.main-content > row-card:nth-child(2) > profile-section > section-card > mat-card > div.section-content-wrapper > div > fields-card:nth-child(1) > ul > li:nth-child(4) > field-formatter > identifier-multi-formatter > span > a")
            ActionChains(driver).move_to_element(founders).perform()
            founders.click()
            f1 = {
                'founder name': driver.find_element_by_xpath('.//*[@class="profile-name"]').text.strip(),
                'founder gender': driver.find_element_by_css_selector('body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout.ng-star-inserted > div > div > div.main-content > row-card:nth-child(1) > profile-section > section-card > mat-card > div.section-content-wrapper > div > fields-card:nth-child(3) > ul > li:nth-child(3) > field-formatter > span').text.strip(),
                }
            fschool = driver.find_element_by_css_selector('body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout.ng-star-inserted > div > div > div.main-content > row-card:nth-child(7) > profile-section > section-card > mat-card > div.section-content-wrapper > div > image-list-card > ul > li > div > field-formatter:nth-child(5) > span')
            ActionChains(driver).move_to_element(fschool).perform()
            f2 = {
                'school': driver.find_element_by_css_selector('body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout.ng-star-inserted > div > div > div.main-content > row-card:nth-child(7) > profile-section > section-card > mat-card > div.section-content-wrapper > div > image-list-card > ul > li > div > a').text.strip(),
                'degree type': driver.find_element_by_css_selector('body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout.ng-star-inserted > div > div > div.main-content > row-card:nth-child(7) > profile-section > section-card > mat-card > div.section-content-wrapper > div > image-list-card > ul > li > div > field-formatter:nth-child(2) > span').text.strip(),
                'degree': driver.find_element_by_css_selector('body > chrome > div > mat-sidenav-container > mat-sidenav-content > div > ng-component > entity-v2 > page-layout > div > div > div > page-centered-layout.ng-star-inserted > div > div > div.main-content > row-card:nth-child(7) > profile-section > section-card > mat-card > div.section-content-wrapper > div > image-list-card > ul > li > div > field-formatter:nth-child(3) > span').text.strip()
                }
            f3 = {**f1, **f2}
            print(f3)
            company_list.append(f1)
        print("next")
        page.click()
    
    
#create dataframe    
df = pd.DataFrame(company_list)

print(df)

#create excel writer object
writer=pd.ExcelWriter('crunchbasedemo.xlsx')

#export to excel
df.to_excel(writer)

writer.save()



print("It's alive!")

由于某些原因，f3 (合并的f1和f2字典)不能打印，当我到达打印点时，我不断收到这个错误：

StaleElementReferenceException: stale element reference: element is not attached to the page document

有什么想法吗？

编辑代码：

hrefs=[x.get_attribute('href') for x in driver.find_elements_by_xpath('//a[@class="component--field-formatter field-type-identifier link-accent ng-star-inserted"]')]
names=[x.get_attribute('title') for x in driver.find_elements_by_xpath('//a[@class="component--field-formatter field-type-identifier link-accent ng-star-inserted"]')]
print(names)
print(hrefs)

company_list=[]

for href in hrefs:    
    driver.get(href)
    try: 
        founders=[x.get_attribute('href') for x in driver.find_elements_by_xpath("//li[@class='ng-star-inserted' and contains(.,'Founders')]//a[@class='link-accent ng-star-inserted']")]
        founder_names = [x.get_attribute('title') for x in driver.find_elements_by_xpath("//li[@class='ng-star-inserted' and contains(.,'Founders')]//a[@class='link-accent ng-star-inserted']")]
        print(founder_names)
        for founder in founders:
            driver.get(founder)
            try:
                fschool = driver.find_elements_by_xpath("(//li[@class='ng-star-inserted']//a[@class='link-accent'])[5]")
                ActionChains(driver).move_to_element(fschool).perform() 
                print(fschool)
            except:
                pass
    except: 
        pass

Answer 1

此答案不完整

driver.get("https://www.crunchbase.com/search/organizations/field/organization.companies/categories/electric-vehicle")
driver.maximize_window()
time.sleep(5)
print(driver.title)

hrefs=[x.get_attribute('href') for x in driver.find_elements_by_xpath('//a[@class="component--field-formatter field-type-identifier link-accent ng-star-inserted"]')]
names=[x.get_attribute('title') for x in driver.find_elements_by_xpath('//a[@class="component--field-formatter field-type-identifier link-accent ng-star-inserted"]')]
print(names)
print(hrefs)
company_list=[]
for href in hrefs:    
    driver.get(href)
    try: 
        founders=[x.get_attribute('href') for x in driver.find_elements_by_xpath("//li[@class='ng-star-inserted' and contains(.,'Founders')]//a[@class='link-accent ng-star-inserted']")]
        founder_names = [x.get_attribute('title') for x in driver.find_elements_by_xpath("//li[@class='ng-star-inserted' and contains(.,'Founders')]//a[@class='link-accent ng-star-inserted']")]
        print(founder_names)
        for founder in founders:
            driver.get(founder)
    except:
        pass

输出：

Query Builder | Organizations | Crunchbase
['Bird', 'Rivian', 'Zoomo', 'NIO', 'Tesla', 'Ample', 'Rad Power Bikes', 'Wallbox', 'ChargePoint', 'Ather Energy', 'SES', 'Ola Electric', 'EVgo', 'Canoo', 'Wayve']
['https://www.crunchbase.com/organization/bird', 'https://www.crunchbase.com/organization/rivian-automotive', 'https://www.crunchbase.com/organization/bolt-bikes', 'https://www.crunchbase.com/organization/nextev', 'https://www.crunchbase.com/organization/tesla-motors', 'https://www.crunchbase.com/organization/ample-6b70', 'https://www.crunchbase.com/organization/rad-power-bikes', 'https://www.crunchbase.com/organization/wallbox', 'https://www.crunchbase.com/organization/chargepoint', 'https://www.crunchbase.com/organization/ather-energy', 'https://www.crunchbase.com/organization/solidenergy', 'https://www.crunchbase.com/organization/ola-electric', 'https://www.crunchbase.com/organization/nrg-evgo', 'https://www.crunchbase.com/organization/canoo-tech', 'https://www.crunchbase.com/organization/wayve-9739']
['Travis VanderZanden']
['Robert J. Scaringe']
['Jack Cheng', 'Lihong Qin', 'William Li']
['Elon Musk', 'JB Straubel', 'Marc Tarpenning', 'Martin Eberhard']
['Mike Radenbaugh', 'Tyler Collins']
['Eduard Castañeda Mañé', 'Enric Asunción']
['Arun Vinayak', 'Swapnil Jain', 'Tarun Mehta']
[]
['Andrew Wolstan', 'Richard Kim', 'Stefan Krause', 'Ulrich Kranz']

因此，要当前转到每个href，只需使用.get_attribute('href')收集href，然后对它们执行driver.get(href)。这可以防止从页面移动到遍历元素的StaleElementExceptions。这是通过检查每家公司是否有创始人部分，如果他们有多个，然后转到每个页面。