Question

所以我想抽出让我们说值=＆＃34;文字IWANNA EXTRACT; 0＆＃34;在下面的HTML代码。我想提取＆＃34; td class =＆＃34; regu＆＃34;中的所有字符串内部值属性。但我似乎无法找到提取它的方法。我已经提取了ppl的名称，但是我无法在值attrib中提取字符串。任何帮助深表感谢。谢谢。我已经24小时了。我可以使用其他库，只要我可以提取它。

<table class="dbtable" border="0" width="100%">
                           <tbody><tr>
                             <td class="tableheader" align="center" width="1%"><b>#</b></td>
                                       <td class="tableheader" align="center" width="60%"><b>User Name</b></td>
                                       <td class="tableheader" align="center"><b>User Type</b></td>
                           </tr><tr bgcolor="#ffffff">
                         <td class="regu"><input name="chkStud" value="THE TEXT IWANNA EXTRACT ;0" type="checkbox"></td>
                         <td class="regu">NAME OF STUDENT HERE   </td>
                         <td class="regu">&nbsp;Student</td>
                       </tr><tr bgcolor="#ffffff">
                         <td class="regu"><input name="chkStud" value="PLEASE EXTRACT ME HERE, IM DYING TO GET OUT;0" type="checkbox"></td>
                         <td class="regu">FOO BAR FOO BAR</td>
                         <td class="regu">&nbsp;Student</td>
                         </tbody></table>

这是python代码

#!/usr/bin/python
from selenium import webdriver
from selenium.webdriver.common.keys import Keys


from bs4 import BeautifulSoup
import logging
driver = webdriver.Firefox()
driver.get("http://somewebsite/iwannascrape/login.php") #page requires a login T_T
assert "Student" in driver.title
elem = driver.find_element_by_name("txtUser")
elem.clear()
elem.send_keys("YOU_SIR_NAME") #login creds. please dont mind :D 
elem2 = driver.find_element_by_name("txtPwd")
elem2.clear()
elem2.send_keys("PASSSWORDHERE")  
elem2.send_keys(Keys.RETURN)
driver.get("http://somewebsite/iwannascrape/afterlogin/illhere")






# using this to extract only the table with class='dbtable' so its easier to manipulate :)
table_clas = driver.find_element_by_xpath("//*[@class='dbtable']")



source_code = table_clas.get_attribute("outerHTML") #this prints out     the     table and its children.
print source_code



for i in range (10): #  spacing for readability
    print "\n"



print table_clas.text #this prints out the names.

Answer 1

找到所需元素后，请使用get_attribute()方法：

elm = driver.find_element_by_css_selector("#dbtable input[name=chkStud]")
print(elm.get_attribute("value"))

Answer 2

table_clas = driver.find_element_by_xpath("//*[@class='dbtable']")
 #select the desired element to thin down the html

td = table_clas.find_elements_by_xpath("//*[@name='chkStud']")

#finally hunt down the element you want specifally.
#find_elements or find_element
#should you use find_elements, then it returns a list you can iterate it
# like

for things in td:
    print things.get_attribute("value")

打印：

文字IWANNA EXTRACT

请在这里提取我，即时消失; 0

如何使用selenium提取value属性的文本

2 个答案: