如何使用 Python (Selenium) 抓取画布元素

Question

我需要来自https://childcaredeserts.org/2018/index.html?state=ID 的信息，特别是当我将鼠标悬停在某个状态时弹出的信息。我尝试过使用 selenium 和 python（我是网络抓取的新手），但我不知道如何获取地图的信息，地图似乎是一个画布元素（在 HTML5 中使用过调查） ，所以我对如何做到这一点有点困惑。

欢迎任何帮助。如有必要，我愿意使用其他编程语言。 也许我不太了解我正在努力解决的画布元素。

到目前为止我的代码：

import time
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

options = webdriver.ChromeOptions()
options.add_argument('headless')
options.add_argument('window-size=1200x600')
driver = webdriver.Chrome('../Downloads/chromedriver', options=options)

driver.get('https://childcaredeserts.org/2018/index.html?state=WA');
action = ActionChains(driver); 
time.sleep(20)

element = WebDriverWait(driver, 30).until(EC.presence_of_element_located((By.CLASS_NAME, "f1sovyv3")))

#here is where I define the path of info, not sure if it's ok
test = driver.find_elements_by_xpath("//*[name()='div' and @id='root']/*[name()='div']") 

res = []
for el in test:
    hover = action.move_to_element(el) 
    hover.perform() 
    #Below here is supposed to receive the info and append it to a list called res
    #licensed_child_care_providers
    #family_child_care_homes
    #state
    #res.append((licensed_child_care_providers, family_child_care_homes, state)))

for i in res:
    print(i)

driver.quit()

Answer 1

这是一个点击画布并四处移动的示例。也打印信息。

canvas = driver.find_element_by_css_selector("canvas.mapboxgl-canvas")
action.move_to_element(canvas).click().perform()
box=driver.find_element_by_xpath('//*[@id="root"]/div/div[2]')
print(box.text)
action.move_by_offset(-50, -50).click().perform()
box=driver.find_element_by_xpath('//*[@id="root"]/div/div[2]')
print(box.text)

输出

Census Tract 9612
Chelan County
Child Care Desert
Licensed child care providers: 0
Family child care homes: 0
Total child care capacity: 0
Total population: 4682
Population under age 5: 219
Median family income: $60,788
Percent of children with all parents in the labor force: 80%
Maternal labor force participation: 76%
Percent non-Hispanic, white: 69%
Percent non-Hispanic, black/African American: 0%
Percent Hispanic/Latino: 27%
Children per licensed child care slot: No licensed child care providers

还有更多。