《深入浅出》HTML&CSS：现代网页开发指南

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selector = parsel.Selector(html_data) lis = selector.css('.list_item h2 a::attr(href)').getall() details = [] for li in lis: detail_url = 'https://travel.qunar.com' + li detail_html = requests.get(detail_url).text details.append(detail_html) # 输出每个网站的 html 数据 for detail_html in details: print(detail_html) detail_html = requests.get(detail_url).text #解析数据 detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title white::text').get() view_count = detail_selector.css('.view_count::text').get() date = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.when > p > span.data::text').get() days = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howlong > p > span.data::text').get() money = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howmuch > p > span.data::text').get() character = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.who > p > span.data::text').get() play_list = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.how > p > span.data > span::text').getall() for play in play_list: print(play) print(title, comment, view_count, date, days, money, character, play_list, detail_url) time.sleep(random.randint(3,5))这段代码只能输出最后一个网站的信息该怎么改

detail_html = requests.get(detail_url).text details.append(detail_html) time.sleep(random.randint(3, 5)) # 每次请求后等待一段时间，避免请求频繁被封 for detail_html in details: # 解析数据 detail_...

#解析数据 detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title white::text').get() view_count = detail_selector.css('.view_count::text').get() date = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.when > p > span.data::text').get() days = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howlong > p > span.data::text').get() money = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howmuch > p > span.data::text').get() character = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.who > p > span.data::text').get() play_list = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.how > p > span.data > span::text').getall() for play in play_list: print(play) print(title, comment, view_count, date, days, money, character, play_list, detail_url) time.sleep(random.randint(3,5))这段代码为什么只能输出最后一个网站的内容，应该怎么修改

detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title white::text').get() view_count = detail_...

selector = parsel.Selector(html_data) lis = selector.css('.list_item h2 a::attr(href)').getall() details = [] for li in lis: detail_url = 'https://travel.qunar.com' + li details.append(detail_url) # 输出每个网站的链接 for detail_url in details: print(detail_url) #解析数据 detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title white::text').get() view_count = detail_selector.css('.view_count::text').get() date = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.when > p > span.data::text').get() days = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howlong > p > span.data::text').get() money = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howmuch > p > span.data::text').get() character = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.who > p > span.data::text').get() play_list = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.how > p > span.data > span::text').getall() for play in play_list: print(play) print(title, comment, view_count, date, days, money, character, play_list, detail_url) time.sleep(random.randint(3,5))这段代码为什么只能输出最后一个网站的内容，改怎么修改

这段代码只能输出最后一个网站的内容是因为在循环结束后，变量 `detail_html` 的值仍然是最后一个网站的内容，而在循环内部对该变量的赋值并没有被使用。要修复这个问题，你可以将循环内部的代码封装成一个函数，...

import requests import random import parsel visited_urls = set() # 保存已经访问过的链接 page = 1 while True: # 循环爬取 url = f'https://travel.qunar.com/travelbook/list.htm?page={page}&order=hot_heat' html_data = requests.get(url).text selector = parsel.Selector(html_data) lis = selector.css('.list_item h2 a::attr(href)').getall() # 遍历当前页面中的所有链接 for li in lis: detail_url = 'https://travel.qunar.com' + li if detail_url in visited_urls: # 如果链接已经访问过，则跳过 continue visited_urls.add(detail_url) # 将链接加入集合中 detail_html = requests.get(detail_url).text time.sleep(random.randint(3, 5)) detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title.white::text').get() view_count = detail_selector.css('.view_count::text').get() date = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.when > p > span.data::text').get() days = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howlong > p > span.data::text').get() money = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howmuch > p > span.data::text').get() character = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.who > p > span.data::text').get() play_list = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.how > p > span.data > span::text').getall() for play in play_list: print(play) print(title, comment, view_count, date, days, money, character, play_list, detail_url) time.sleep(random.randint(3, 5)) # 判断是否需要继续爬取 if len(lis) == 0 or page >= 20: break page += 1这段代码怎么将爬取出来的所有数据保存到csv文件

detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title.white::text').get() view_count = ...

var promiseGetApServerURL = Css_JsonFactory.getJsonData(Css_CommonConst.APSERVERURL_JSON_URL).then(function(res){ // APｻｰﾊﾞｱﾄﾞﾚｽが存在しない場合 if (Css_CheckFactory.checkUndefNull(res) === true || jQuery.trim(res).length === 0) { var errorObj = {}; errorObj.errorCode = 'Css0021W'; errorObj.errorMessage = Css_MessageFactory.getMessage(errorObj.errorCode, []); promiseGetApServerURLErrorList.push(errorObj); // エラー処理 throw new Error(JSON.stringify(promiseGetApServerURLErrorList)); } // セッションストレージにAPサーバURLを登録 Css_StorageFactory.setItem(Css_CommonConst.APSBADRS_SESSION_STORAGE_KEY, jQuery.trim(res)); }).catch(function(res) {} JI==解析代碼

这段代码使用了Promise对象，通过调用Css_JsonFactory.getJsonData()方法获取APSERVERURL的JSON数据。如果返回的数据为undefined或者空字符串，则会抛出一个错误，并将错误对象添加到promiseGetApServerURLErrorList...

from selenium import webdriver # 设置Chrome浏览器驱动程序的路径 driver_path = "C:\Program Files\Google\Chrome\Application/chromedriver" # 创建Chrome浏览器对象 driver = webdriver.Chrome(driver_path) # 打开百度网页 driver.get("https://www.baidu.com") # 找到搜索框元素，并输入关键字 search_box = driver.find_element_by_css_selector("#kw") search_box.send_keys("RPA") # 找到搜索按钮元素，并点击 search_button = driver.find_element_by_css_selector("#su") search_button.click() # 等待搜索结果加载完成 driver.implicitly_wait(5) # 获取搜索结果列表 search_results = driver.find_elements_by_css_selector(".result") # 打印搜索结果标题和链接 for result in search_results: title = result.find_element_by_css_selector("h3").text url = result.find_element_by_css_selector("a").get_attribute("href") print(f"Title: {title}") print(f"URL: {url}") print("") # 关闭浏览器 driver.quit() 将读取的数据保存成pdf

pdfkit.from_string(search_results_html, "search_results.pdf") ``` 运行以上代码后，它将会将搜索结果保存为名为`search_results.pdf`的PDF文件。请确保`pdfkit`和`wkhtmltopdf`都已正确安装，并且`wkhtmltopdf`...

指出下面代码存在的问题 # 模拟登录 import json import time from selenium.webdriver.common.by import By from selenium.webdriver.support import expected_conditions from selenium.webdriver.support.wait import WebDriverWait from utils import create_chrome_driver browser = create_chrome_driver() browser.get('https://login.taobao.com') # 隐式等待 browser.implicitly_wait(10) # 获取页面元素模拟用户输入和点击行为 username_input = browser.find_element(By.CSS_SELECTOR, '#fm-login-id') username_input.send_keys('15082435774') # 填写用户名 password_input = browser.find_element(By.CSS_SELECTOR, '#fm-login-password') password_input.send_keys('wu8266005') # 填写对应的密码 # 登录按钮 login_button = browser.find_element(By.CSS_SELECTOR, '#login-form > div.fm-btn > button') login_button.click() # 显示等待 wait_obj = WebDriverWait(browser, 10) wait_obj.until(expected_conditions.presence_of_element_located((By.CSS_SELECTOR, 'div.m-userinfo'))) time.sleep(15) # 获取登录的cookie数据，并且写入文件 with open('taobao2.json', 'w') as file: json.dump(browser.get_cookies(), file)

login_button = browser.find_element(By.CSS_SELECTOR, '#login-form > div.fm-btn > button') login_button.click() # 显式等待 wait_obj = WebDriverWait(browser, 10) wait_obj.until(EC.presence_of_...

driver.find_element_by_css_selector('.tabform .formitem input').send_keys(17320619522)

这段代码使用了Selenium的WebDriver来模拟用户在网页上的操作，通过CSS选择器定位了一个class为`tab__form`的元素下面的一个class为`form__item`的元素下面的一个`input`元素，并向其中输入了`17320619522`。...

修改.el-scrollbar .el-scrollbarwrap .el-scrollbarview高度为100%

要将.el-scrollbar .el-scrollbar__wrap .el-scrollbar__view的高度修改为100%，可以在CSS中添加以下样式： ```css .el-scrollbar .el-scrollbar__wrap .el-scrollbar__view { height: 100%; } ``` 这将把.el-...

css_epics_3.2.16.zip

通过引入CSS Epics框架提供的样式和效果，开发者可以轻松地创建出具有美观和一致性的网页界面。最后，值得注意的是，尽管这个压缩文件版本为3.2.16，但是开发者可以根据自己的需要在以后的项目中选择不同的版本。...

selector = parsel.Selector(html_data) lis = selector.css('.list_item h2 a::attr(href)').getall() details = [] for li in lis: detail_url = 'https://travel.qunar.com' + li detail_html = requests.get(detail_url).text details.append(detail_html) time.sleep(random.randint(3, 5)) # 每次请求后等待一段时间，避免请求频繁被封 for detail_html in details: # 解析数据 detail_selector = parsel.Selector(detail_html) title = detail_selector.css('.b_crumb_cont *:nth-child(3)::text').get() comment = detail_selector.css('.title.white::text').get() view_count = detail_selector.css('.view_count::text').get() date = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.when > p > span.data::text').get() days = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howlong > p > span.data::text').get() money = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.howmuch > p > span.data::text').get() character = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.who > p > span.data::text').get() play_list = detail_selector.css('#js_mainleft > div.b_foreword > ul > li.f_item.how > p > span.data > span::text').getall() for play in play_list: print(play) print(title, comment, view_count, date, days, money, character, play_list, detail_url)这段代码输出的文字可以匹配，但是网站都是同一个，要怎么改

如果您想爬取同一个网站的不同分类、不同标签或不同页面的游记，可以修改`html_data`的值为对应页面的HTML源码，并修改`lis`的值为对应页面中游记链接所在的CSS选择器。例如，如果您要爬取...

driver.switch_to.frame有什么用

iframe = driver.find_element_by_css_selector("iframe#myFrame") # 切换到 iframe driver.switch_to.frame(iframe) # 在 iframe 中定位元素 element = driver.find_element_by_css_selector("#elementId") # 操作...

get -neweronly /home/tomcat7/webapps/ROOT/pro/css/hl_dp_bgxq.css C:\Users\Administrator\Desktop\07.13\saas\备份\pro\css\hl_dp_bgxq.css

您的问题是如何使用 `get -neweronly`令将 `/home/tomcat7/webapps/ROOT/pro/css/hl_dp_bgxq.css` 文件从 Linux 系统复制到 Windows 系统中的 `C:\Users\Administrator\Desktop\07.13\saas\备份\pro\css\` 目录下的...

expected str, bytes or os.PathLike object, not _io.TextIOWrapper

pdfkit.from_file(path_id + '.html', path_id + '.pdf', configuration=config, options=options, css=css) 通过这种方式，你将直接将HTML页面转换成PDF文件，而不需要提供_io.TextIOWrapper类型的参数，因此不会...

编写实现用户注册程序reg.html和reg_ok.jsp程序

用户注册程序reg.html可以通过HTML和CSS编写，包括用户输入的表单和提交按钮等。而reg_ok.jsp程序可以通过Java语言编写，用于处理用户提交的表单数据并将其保存到数据库中。具体实现方式可以根据具体需求进行设计和...

from selenium import webdriver # 设置Chrome浏览器驱动程序的路径 driver_path = "path_to_chrome_driver/chromedriver" # 创建Chrome浏览器对象 driver = webdriver.Chrome(driver_path) # 打开百度网页 driver.get("https://www.baidu.com") # 找到搜索框元素，并输入关键字 search_box = driver.find_element_by_css_selector("#kw") search_box.send_keys("RPA") # 找到搜索按钮元素，并点击 search_button = driver.find_element_by_css_selector("#su") search_button.click() # 等待搜索结果加载完成 driver.implicitly_wait(5) # 获取搜索结果列表 search_results = driver.find_elements_by_css_selector(".result") # 打印搜索结果标题和链接 for result in search_results: title = result.find_element_by_css_selector("h3").text url = result.find_element_by_css_selector("a").get_attribute("href") print(f"Title: {title}") print(f"URL: {url}") print("") # 关闭浏览器 driver.quit() 优化这段代码

3. 使用CSS选择器代替XPath选择器：CSS选择器的性能通常比XPath选择器更好。可以尝试使用CSS选择器来定位元素。 ```python # 打印搜索结果标题和链接 for result in search_results: title = result.find_element_...

vite版本升级4.2.1后，build生成的dist 文件夹中的index.html没有引入js和css,_app.config.js也没有被引入

可能是升级过程中出现了一些错误或者漏掉了一些步骤，导致生成的dist文件夹中的index.html没有引入js和css，_app.config.js也没有被引入。您可以尝试重新升级vite版本，并确保按照官方文档进行操作。如果问题仍然...

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《深入浅出》HTML&CSS：现代网页开发指南

[HeadFirst深入浅出_HTML与CSS、XHTML（中文版）.弗里曼.扫描版.pdf

深入浅出html(中文版)

深入浅出HTML与CSS、XHTML（中文版）--源代码(2)

driver.find_element_by_css_selector('.tab__form .form__item input').send_keys(17320619522)

修改.el-scrollbar .el-scrollbar__wrap .el-scrollbar__view高度为100%

css_epics_3.2.16.zip

driver.switch_to.frame有什么用

get -neweronly /home/tomcat7/webapps/ROOT/pro/css/hl_dp_bgxq.css C:\Users\Administrator\Desktop\07.13\saas\备份\pro\css\hl_dp_bgxq.css

expected str, bytes or os.PathLike object, not _io.TextIOWrapper

编写实现用户注册程序reg.html和reg_ok.jsp程序

vite版本升级4.2.1后，build生成的dist 文件夹中的index.html没有引入js和css,_app.config.js也没有被引入

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driver.find_element_by_css_selector('.tabform .formitem input').send_keys(17320619522)

修改.el-scrollbar .el-scrollbarwrap .el-scrollbarview高度为100%