Selenium

# Selenium

#

# 自动化测试工具，致辞多种浏览器

# 爬虫中主要用来解决JavaScript渲染的问题

# 安装

# pip install seleium

from selenium import webdriver

from selenium.webdriver.common.by import By

from selenium.webdriver.common.keys import Keys

from selenium.webdriver.support import expected_conditions as EC

from selenium.webdriver.support.wait import WebDriverWait

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# try:

#    browser.get('https://baidu.com')

#    input = browser.find_element_by_id('kw')

#    input.send_keys('Python')

#    input.send_keys(Keys.ENTER) # 回车

#    wati = WebDriverWait(browser, 10)

#    wati.until(EC.presence_of_element_located((By.ID, 'su')))

#    print(browser.current_url) # 当前页面的url

#    print(browser.get_cookies()) # cokies列表

#    print(browser.page_source) # 网页源代码

# finally:

#    browser.close()

# # 声明浏览器对象

# # from selenium import webdriver

# # browser = webdriver.Chrome()

# # browser = webdriver.Firefox()

# # browser = webdriver.Edge()

# # browser = webdriver.PhantomJS()

# # browser = webdriver.Safari()

# # 访问页面

# from selenium import webdriver

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com')

# print(browser.page_source)

# browser.close()

# # 查找元素

# #

# # 单个元素

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com/')

# input_first = browser.find_element_by_id('q') # id

# input_second = browser.find_element_by_css_selector('#q') # css选择器

# input_third = browser.find_element_by_xpath('//*[@id="q"]') # xpath

# print(input_first, input_second, input_third)

# browser.close()

# # find_element_by_name

# # find_element_by_xpath

# # find_element_by_link_text

# # find_element_by_partial_link_text

# # find_element_by_tag_name

# # find_element_by_class_name

# # find_element_by_css_selector

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com')

# input_first = browser.find_element(By.ID, 'q')

# print(input_first)

# browser.close()

# # 多个元素

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://.www.taobao.com')

# lis = browser.find_elements_by_css_selector('.service-bd li') # 返回列表

# print(lis)

# browser.close()

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com')

# lis = browser.find_elements(By.CSS_SELECTOR, '.service-bd li') # 返回列表

# print(lis)

# browser.close()

# find_elements_by_name

# find_elements_by_xpath

# find_elements_by_link_text

# find_elements_by_partial_link_text

# find_elements_by_tag_name

# find_elements_by_class_name

# find_elements_by_css_selector

# 元素交互动作

# import time

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com')

# input = browser.find_element_by_id('q')

# input.send_keys('iPhone')

# time.sleep(1)

# input.clear()

# input.send_keys('iPad')

# button = browser.find_element_by_class_name('tb-bg')

# button.click()

# browser.close()

# 交互动作

#

#  将动作附加到动作链中串行执行

# from selenium.webdriver import ActionChains

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'http://www.runoob.com/try/try.php?filename=jqueryui-api-droppable'

# browser.get(url)

# browser.switch_to.frame('iframeResult')

# source = browser.find_element_by_css_selector('#draggable')

# target = browser.find_element_by_css_selector('#droppable')

# actions = ActionChains(browser)

# actions.drag_and_drop(source, target)

# actions.perform()

# browser.close()

# 执行JavaScript

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'https://www.zhihu.com/explore'

# browser.get(url)

# browser.execute_script('window.scrollTo(0,document.body.scrollHeight)')

# browser.execute_script('alert("To Bottom")')

# 获取元素信息

#

# 获取属性

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'https://www.zhihu.com/explore'

# browser.get(url)

# logo = browser.find_element_by_id('zh-top-link-logo')

# print(logo)

# print(logo.get_attribute('class'))

# browser.close()

# 获取文本值

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'https://www.zhihu.com/explore'

# browser.get(url)

# input = browser.find_element_by_class_name('zu-top-add-question')

# print(input.text)

# 获取ID 位置 标签名 大小

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'https://www.zhihu.com/explore'

# browser.get(url)

# input = browser.find_element_by_class_name('zu-top-add-question')

# print(input.id) # id

# print(input.location) # 位置

# print(input.tag_name) # 标签名

# print(input.size) # 大小

# Frame

#

# from selenium.common.exceptions import NoSuchElementException

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# url = 'http://www.runoob.com/try/try.php?filename=jqueryui-api-droppable'

# browser.get(url)

# browser.switch_to.frame('iframeResult')

# source = browser.find_element_by_css_selector('#draggable')

# print(source)

# try:

#    logo = browser.find_element_by_class_name('logo')

# except NoSuchElementException:

#    print('NO LOGO')

# browser.switch_to.parent_frame()

# logo = browser.find_element_by_class_name('logo')

# print(logo)

# print(logo.text)

# 等待

#

# 隐式等待

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.implicitly_wait(10) # 隐式等待

# browser.get('https://www.zhihu.com/explore')

# input = browser.find_element_by_class_name('zu-top-add-question')

# print(input)

# 显式等待

#

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.taobao.com/')

# wait = WebDriverWait(browser, 10)

# input = wait.until(EC.presence_of_element_located((By.ID, 'q')))

# button = wait.until(EC.element_to_be_clickable(

#    (By.CSS_SELECTOR, '.btn-search')))

# print(input, button)

# title_is 标题是某内容

# title_contains 标题彪悍某内容

# presence_of_element_located 元素加载出 传入定位远足，如（By.ID,'p')

# visibility_of_elements_located 元素可见，传入定位元组

# visibility_of 可见，传入元素对象

# presence_of_all_elements_located 所有元素加载出

# text_to_be_present_in_element 某个元素文本包含某文字

# text_to_be_present_in_element_value 某个元素值包含某文字

# frame_to_be_available_and_switch_to_it frame加载并切换

# invisibility_of_element_located 元素不可见

# element_to_be_clickable 元素可点击

# staleness_of 判断一个元素是否仍在DOM，可判断页面是否已经刷新

# selement_to_be_selected 元素可选择，传元素对象

# element_located_to_be_selected 元素可选择，传入定位元祖

# element_selection_state_to_be 传入元素对象以及状态，相等返回True，否则返回False

# selement_located_selection_state_to_be 传入定位远祖以及状态，相等返回True，否则返回False

# alert_is_present 是否出现alert

# 前进后题

import time

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.baidu.com/')

# browser.get('https://taobao.com/')

# browser.get('https://wwww.python.org/')

# browser.back()

# time.sleep(1)

# browser.forward()

# browser.close()

# Cookies

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.zhihu.com/explore')

# print(browser.get_cookies())

# browser.add_cookie({'name': 'name', 'domain': 'www.zhihu.com','value':'germey'})

# print(browser.get_cookies())

# browser.delete_all_cookies()

# print(browser.get_cookies())

# 选项卡管理

#

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.baidu.com')

# browser.execute_script('window.open()')

# print(browser.window_handles)

# browser.switch_to_window(browser.window_handles[1])

# browser.get('https://www.taobao.com')

# time.sleep(1)

# browser.switch_to_window(browser.window_handles[0])

# browser.get('https://python.org')

# 异常处理

# browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

# browser.get('https://www.baidu.com')

# browser.find_elements_by_id('hello')

from selenium.common.exceptions import TimeoutException, NoSuchElementException

browser = webdriver.Chrome('/Users/songhuan/path/chromedriver')

try:

    browser.get('https://www.baidu.com')

except TimeoutException:

    print('Time Out')

try:

    browser.find_elememt_by_id('hello')

except NoSuchElementException:

    print('No Element')

except Exception as e:

    print(e)

finally:

    browser.close()