在使用 selenium 和 python 进行网络抓取时删除 <br> 标签以正确对齐

Question

我想在网络抓取页面时删除 <br> html 标记，但替换似乎不起作用。我不确定是否有另一种方法或更好的方法使用 selenium 和 python。提前谢谢你。

from selenium import webdriver
from selenium.webdriver.support.ui import Select
from selenium.webdriver.common.keys import Keys

driver = webdriver.Chrome("drivers/chromedriver")

driver.get("https://web3.ncaa.org/hsportal/exec/hsAction")

state_drop = driver.find_element_by_id("state")
state = Select(state_drop)
state.select_by_visible_text("New Hampshire")

driver.find_element_by_id("city").send_keys("Moultonborough")
driver.find_element_by_id("name").send_keys("Moultonborough Academy")
driver.find_element_by_class_name("forms_input_button").send_keys(Keys.RETURN)
driver.find_element_by_id("hsSelectRadio_1").click()

courses_subheading = driver.find_elements_by_tag_name("th.header")

print(courses_subheading[0].text, "     " ,courses_subheading[1].text, "     ", courses_subheading[2].text, "     ", courses_subheading[3].text, "     ", courses_subheading[4].text

我试过这个：

for i in courses_subheading:
    courses_subheading.replace("<br>", " ")

但出现错误：AttributeError: 'list' object has no attribute 'replace'

目前，它看起来像这样：

Course
Weight     Title     Notes     Max
Credits       OK
Through       Disability
Course

但我想要这样：

Course Weight     Title     Notes     Max Credits     OK     Through     Disability Course

Answer 1

您可以轻松避免使用 <br> 标签，而不是删除 <br>。要打印 table headers，例如Title,Notes,等需要归纳WebDriverWait for the visibility_of_all_elements_located() and you can use either of the following Locator Strategies:

使用css_selector：

driver.get("https://web3.ncaa.org/hsportal/exec/hsAction")
Select(WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.ID, "state")))).select_by_visible_text("New Hampshire")
driver.find_element_by_css_selector("input#city").send_keys("Moultonborough")
driver.find_element_by_css_selector("input#name").send_keys("Moultonborough Academy")
driver.find_element_by_css_selector("input[value='Search']").click()
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "input[name='hsCode']"))).click()
print([my_elem.text for my_elem in WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.CSS_SELECTOR, "table#approvedCourseTable_1 th.header")))])

使用xpath：

driver.get("https://web3.ncaa.org/hsportal/exec/hsAction")
Select(WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.ID, "state")))).select_by_visible_text("New Hampshire")
driver.find_element_by_xpath("//input[@id='city']").send_keys("Moultonborough")
driver.find_element_by_xpath("//input[@id='name']").send_keys("Moultonborough Academy")
driver.find_element_by_xpath("//input[@value='Search']").click()
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//input[@name='hsCode']"))).click()
print([my_elem.text for my_elem in WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.XPATH, "//table[@id='approvedCourseTable_1']//th[@class='header']")))])

控制台输出：

['Course\nWeight', 'Title', 'Notes', 'Max\nCredits', 'OK\nThrough', 'Disability\nCourse']

注意：您必须添加以下导入：

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

Answer 2

要完成，如果你真的想删除 br 标签，你可以使用（我已经修复了你的 XPath 表达式）：

import re
courses_subheading = driver.find_elements_by_xpath("(//tr[th[@class='header']])[1]/th")
headers = [re.sub('\s+',' ',el.text) for el in courses_subheading]
print(headers)

输出：

['Course Weight', 'Title', 'Notes', 'Max Credits', 'OK Through', 'Disability Course']

在使用 selenium 和 python 进行网络抓取时删除 <br> 标签以正确对齐

Removing <br> tag for proper alignment while webscraping using selenium and python

python

selenium

xpath

css-selectors

webdriverwait