有没有办法让硒只给我今天的数据？

Question

我正在尝试创建一个脚本来告诉我当天的潮汐水平selenium，但它会为我提供整周的所有数据。我怎么让它只给我今天的数据？from selenium import webdriverfrom selenium.webdriver.common.keys import Keysfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.support.ui import WebDriverWaitfrom selenium.webdriver.support import expected_conditions as EC import timeimport datetimedriver = webdriver.Chrome('/Users/judeslater/Downloads/chromedriver')driver.get('https://magicseaweed.com/Nosara-Surf-Report/445/Tide/')WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '//*[@id="msw-js-tide-list"]')))Day_of_Week = datetime.datetime.today().weekday()Break_Key = Day_of_Week + 1element = driver.find_elements_by_id('msw-js-tide-list')intDay = datetime.date(year=2000, month=12, day=1).weekday()days = ["MON", "TUE", "WED", "THU", "FRI", "SAT", "SUN"]def contains_word(string, target):    return target in string   for value in element:    Ocean_Data = value    print(Ocean_Data.text)    time.sleep(1)    if contains_word(str(Ocean_Data), days[Break_Key]) == True:       break    else:        continue    break    driver.quit()

Answer 1

你有很多错误，但主要是你的

find_elements_by_id('msw-js-tide-list')

它为您提供了所有日期作为一个元素的表格。

你应该在最后使用更复杂的xpathwith来将每一天作为单独的元素 - 然后你可以过滤它。/div

find_elements_by_xpath('//*[@id="msw-js-tide-list"]/div')

您不必添加+1到Day_of_Week因为python开始索引0

如果你想得到明天然后更好地使用

tomorrow = today + datetime.timedelta(days=1)

0或者当你得到时使用模数移动到7

Break_Key = (Day_of_Week + 1) % 7

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.support import expected_conditions as EC 

import time

import datetime

days = ["MON", "TUE", "WED", "THU", "FRI", "SAT", "SUN"]

today = datetime.datetime.today()

#tomorrow = today + datetime.timedelta(days=1)

#day_of_week = tomorrow.weekday()

day_of_week = today.weekday()

selected_day = days[day_of_week]

driver = webdriver.Chrome('/Users/judeslater/Downloads/chromedriver')

#driver = webdriver.Firefox()

driver.get('https://magicseaweed.com/Nosara-Surf-Report/445/Tide/')

WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '//*[@id="msw-js-tide-list"]')))

all_days = driver.find_elements_by_xpath('//*[@id="msw-js-tide-list"]/div')

for ocean_data in all_days:

    if selected_day in ocean_data.text:

        print(ocean_data.text)

        break

driver.quit()

如果您想要今天的数据，那么它可能始终是表格中的第一天，因此您all_days[1]无需检查即可使用selected_day

隐藏div在 HTML 中，所以我必须使用[1]而不是来[0]获取今天的数据。

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.support import expected_conditions as EC 

import time

import datetime

driver = webdriver.Chrome('/Users/judeslater/Downloads/chromedriver')

#driver = webdriver.Firefox()

driver.get('https://magicseaweed.com/Nosara-Surf-Report/445/Tide/')

WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '//*[@id="msw-js-tide-list"]')))

all_days = driver.find_elements_by_xpath('//*[@id="msw-js-tide-list"]/div')

ocean_data = all_days[1] # there is one hidden `div` which I have to skip to get today's data

print(ocean_data.text)

driver.quit()

我可以使用[2]in做同样的事情xpath（因为python开始索引0但xpath开始于1）并在 word 中使用find_element_...without char只得到一个结果selement

ocean_data = driver.find_element_by_xpath('//*[@id="msw-js-tide-list"]/div[2]')

print(ocean_data.text)

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.support import expected_conditions as EC 

import time

import datetime

driver = webdriver.Chrome('/Users/judeslater/Downloads/chromedriver')

#driver = webdriver.Firefox()

driver.get('https://magicseaweed.com/Nosara-Surf-Report/445/Tide/')

WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '//*[@id="msw-js-tide-list"]')))

ocean_data = driver.find_element_by_xpath('//*[@id="msw-js-tide-list"]/div[2]')

print(ocean_data.text)

driver.quit()

Answer 2

for value in element:

为什么不使用 element[0] 而不是这个 for 循环，因为您只需要该列表的第一个元素（'msw-js-tide-list'），它给出了今天的日期。

Ocean_Data = element[0]

print(Ocean_Data.text)

time.sleep(1)

if contains_word(str(Ocean_Data), days[Break_Key]) == True:

   break