import os import psutil from selenium.webdriver.chrome.options import Options from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support import expected_conditions as EC

检查是否已经存在浏览器实例，如果存在则不再创建

for proc in psutil.process_iter(): try: if 'chrome' in proc.name() and '--remote-debugging-port=9223' in proc.cmdline(): options = Options() options.add_experimental_option('debuggerAddress', '127.0.0.1:9223') break except: pass else: # 创建浏览器实例 os.system(r'start chrome --remote-debugging-port=9223 --user-data-dir="D:\评阅用"') options = Options() options.add_experimental_option('debuggerAddress', '127.0.0.1:9223')

在已有的浏览器实例中查找标签页

driver = webdriver.Chrome(options=options) tabs = driver.window_handles for tab in tabs: driver.switch_to.window(tab) if driver.title == '国家开放大学个人空间': break

在网页中查找课程

elements = driver.find_elements(By.CLASS_NAME,'learning_course') for element in elements: if element.text == '国家开放大学学习指南': element.click() break

切换到点击课程后的标签页

tabs = driver.window_handles for tab in tabs: if tab != driver.current_window_handle: driver.switch_to.window(tab) break

等待网页加载完成

WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, 'item-status')))

判断网页是否卡住，如果卡住就刷新一下网页

if driver.execute_script('return document.readyState') != 'complete': driver.refresh()

在网页中查找‘进行中’并点击

elements = driver.find_elements(By.CLASS_NAME, 'item-status') for element in elements: if element.text == '进行中': element.click() # 等待网页加载完成 WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, 'font-toggle-collapsed'))) # 在网页中查找所有展开按钮并点击 while True: elements = driver.find_elements(By.CLASS_NAME, 'font-toggle-collapsed') if not elements: break for element in elements: driver.execute_script('arguments[0].click();', element) break else: # 如果没找到‘进行中’，则点击全部展开 elements = driver.find_elements(By.CLASS_NAME, 'icon.font.font-toggle-all-collapsed') if elements: elements[0].click() # 等待课程全部展开 WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, 'item-status'))) # 再次查找‘进行中’元素并点击 elements = driver.find_elements(By.CLASS_NAME, 'item-status') for element in elements: if element.text == '进行中': element.click() # 等待网页加载完成 WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, 'font-toggle-collapsed'))) # 在网页中查找所有展开按钮并点击 while True: elements = driver.find_elements(By.CLASS_NAME, 'font-toggle-collapsed') if not elements: break for element in elements: driver.execute_script('arguments[0].click();', element) break

等待网页加载完成

WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CSS_SELECTOR, 'span[class="ng-binding"][tipsy="activity.title"]')))

判断网页是否卡住，如果卡住就刷新一下网页

if driver.execute_script('return document.readyState') != 'complete': driver.refresh()

在网页中查找所有指定class属性的元素，并点击

elements = driver.find_elements(By.CSS_SELECTOR, 'span[class="ng-binding"][tipsy="activity.title"]') for element in elements: element.click() # 等待网页加载完成 WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CSS_SELECTOR, 'span[class="ng-binding"][tipsy="activity.title"]')))