selenium_基本用法

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from selenium import webdriver

browser=webdriver.Firefox()

browser.get('http://mail.yahoo.com')

emailElem=browser.find_element_by_id('login-username')

emailElem.send_keys('not_my_real_email')

passwordElem=browser.find_element_by_id('login-passwd')

passwordElem.send_keys('12345')

passwordElem.submit() #把用户名和密码显示到框架上

如果没有passwordElem.submit() ，就不会显示用户名和密码

from selenium import webdriver

browser = webdriver.Firefox()

browser.get('http://inventwithpython.com')

try:

    elem = browser.find_element_by_class_name('bookcover') #程序执行速度慢

    print('Found <%s> element with that class name!' % (elem.tag_name))

except:

    print('Was not able to find an element with that name.')

    

linkElem=browser.find_element_by_link_text('Read It Online')

 

linkElem.click() #执行速度很慢
 

#特别注意属性值大小写敏感：Keys,Firefox,HOME,END等等

from selenium import webdriver

from selenium.webdriver.common.keys import Keys #Keys 等导入对象大小写敏感

browser=webdriver.Firefox()     #Firefox大小写敏感

browser.get('http://nostarch.com')

htmlElem=browser.find_element_by_tag_name('html')

htmlElem.send_keys(Keys.END) #scrolls to bottom

#htmlElem.send_keys(Keys.HOME)  #scrolls to top

#特别注意属性值大小写敏感：Keys,Firefox,HOME,END等等

from selenium import webdriver

from selenium.webdriver.common.keys import Keys #Keys 等导入对象大小写敏感

browser=webdriver.Firefox()     #Firefox大小写敏感

browser.get('http://nostarch.com')

htmlElem=browser.find_element_by_tag_name('html')

htmlElem.send_keys(Keys.END) #scrolls to bottom

#htmlElem.send_keys(Keys.HOME)  #scrolls to top

 

linkElem=browser.find_element_by_link_text('Rootkits and Bootkits')

linkElem.click()    #点击Rootkits and Bootkits链接

browser.back()    #后退网页

browser.forward()  #前进网页

browser.refresh()  #刷新网页

browser.quit()    #退出浏览器

 

 

 

 

Table 11-3. Selenium’s WebDriver Methods for Finding Elements

Method name	WebElement object/list returned
browser.find_element_by_class_name(name) browser.find_elements_by_class_name(name)	Elements that use the CSS class name
browser.find_element_by_css_selector(selector) browser.find_elements_by_css_selector(selector)	Elements that match the CSS selector
browser.find_element_by_id(id) browser.find_elements_by_id(id)	Elements with a matching id attribute value
browser.find_element_by_link_text(text) browser.find_elements_by_link_text(text)	<a> elements that completely match the textprovided
browser.find_element_by_partial_link_text(text) browser.find_elements_by_partial_link_text(text)	<a> elements that contain the text provided
browser.find_element_by_name(name) browser.find_elements_by_name(name)	Elements with a matching name attribute value
browser.find_element_by_tag_name(name) browser.find_elements_by_tag_name(name)	Elements with a matching tag name (case insensitive; an <a> element is matched by 'a'and 'A')

Table 11-4. WebElement Attributes and Methods

Attribute or method	Description
tag_name	The tag name, such as 'a' for an <a> element
get_attribute(name)	The value for the element’s name attribute
text	The text within the element, such as 'hello' in <span>hello</span>
clear()	For text field or text area elements, clears the text typed into it
is_displayed()	Returns True if the element is visible; otherwise returns False
is_enabled()	For input elements, returns True if the element is enabled; otherwise returns False
is_selected()	For checkbox or radio button elements, returns True if the element is selected; otherwise returns False
location	A dictionary with keys 'x' and 'y' for the position of the element in the page

 

 

 

 

 

Table 11-5. Commonly Used Variables in the selenium.webdriver.common.keysModule

Attributes	Meanings
Keys.DOWN, Keys.UP, Keys.LEFT, Keys.RIGHT	The keyboard arrow keys
Keys.ENTER, Keys.RETURN	The ENTER and RETURN keys
Keys.HOME, Keys.END, Keys.PAGE_DOWN,Keys.PAGE_UP	The home, end, pagedown, and pageup keys
Keys.ESCAPE, Keys.BACK_SPACE, Keys.DELETE	The ESC, BACKSPACE, and DELETE keys
Keys.F1, Keys.F2,..., Keys.F12	The F1 to F12 keys at the top of the keyboard
Keys.TAB	The TAB key