如何在 Selenium RC 中使用 xpath 访问非第一个匹配项?
我的页面中有 20 个标签:
In [85]: sel.get_xpath_count("//label")
Out[85]: u'20'
我可以默认使用第一个标签:
In [86]: sel.get_text("xpath=//label")
Out[86]: u'First label:'
尝试对 xpath 下标以获取第二个标签的文本时遇到错误:
In [87]: sel.get_text("xpath=//label[2]")
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (216, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (1186, 0))
---------------------------------------------------------------------------
Exception Traceback (most recent call last)
/Users/me/<ipython console> in <module>()
/Users/me/selenium.pyc in get_text(self, locator)
1187 'locator' is an element locator
1188 """
-> 1189 return self.get_string("getText", [locator,])
1190
1191
/Users/me/selenium.pyc in get_string(self, verb, args)
217
218 def get_string(self, verb, args):
--> 219 result = self.do_command(verb, args)
220 return result[3:]
221
/Users/me/selenium.pyc in do_command(self, verb, args)
213 #print "Selenium Result: " + repr(data) + "\n\n"
214 if (not data.startswith('OK')):
--> 215 raise Exception, data
216 return data
217
Exception: ERROR: Element xpath=//label[2] not found
但是,与我找到的 xpath 文档不同,我在 ?
I have 20 labels in my page:
In [85]: sel.get_xpath_count("//label")
Out[85]: u'20'
And I can get the first one be default:
In [86]: sel.get_text("xpath=//label")
Out[86]: u'First label:'
But, unlike the xpath docs I've found, I'm getting an error trying to subscript the xpath to get to the second label's text:
In [87]: sel.get_text("xpath=//label[2]")
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (216, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (1186, 0))
---------------------------------------------------------------------------
Exception Traceback (most recent call last)
/Users/me/<ipython console> in <module>()
/Users/me/selenium.pyc in get_text(self, locator)
1187 'locator' is an element locator
1188 """
-> 1189 return self.get_string("getText", [locator,])
1190
1191
/Users/me/selenium.pyc in get_string(self, verb, args)
217
218 def get_string(self, verb, args):
--> 219 result = self.do_command(verb, args)
220 return result[3:]
221
/Users/me/selenium.pyc in do_command(self, verb, args)
213 #print "Selenium Result: " + repr(data) + "\n\n"
214 if (not data.startswith('OK')):
--> 215 raise Exception, data
216 return data
217
Exception: ERROR: Element xpath=//label[2] not found
What gives?
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使用:
(//label)[2]
您当前使用的 XPath 表达式:
表示:
选择文档中作为第二个
label
子元素的每个label
元素它的父级。文档中的每个label
很可能只是其父级的第一个也是唯一的label
子级。在这种情况下,上面的表达式不会选择任何内容。Use:
(//label)[2]
The XPath expression you are currently using:
means:
Select every
label
element in the document that is the secondlabel
child of its parent. Chances are that everylabel
in the document is just the first and onlylabel
child of its parent. In such a case the above expression selects nothing.