你正在使用，所以从个人偏好我假设Python。其他语言不应该有什么不同。

is_element_present 函数可以用于此。从Selenium来源：

  def is_element_present（self，locator）：

验证指定的元素在页面上的某处

'locator'是一个元素定位器

 return self.get_boolean（isElementPresent，[locator，] 
 

对于定位器，您可以使用css = a [href * ='rid']。

I have a HTML tags:

<a href="rid=7059"> abc </a>
<a href="pid=8059"> fgh </a>
<a href="cid=9059"> cxq </a>

HOw do I check if a particular tag exists with the href attribute containing rid (First tag in the above example)

get_attribute() gets the value of a specified attribute but how do i check when in a page any such tag exists whose attribute value is rid ?

Thanks for the help.

You didn't mention the language you are using, so from personal preference I'm assuming Python. Other languages shouldn't really differ, though.

The is_element_present function can be used for this. From the Selenium source:

def is_element_present(self,locator):
    """
    Verifies that the specified element is somewhere on the page.

    'locator' is an element locator
    """
    return self.get_boolean("isElementPresent", [locator,]

For the locator you could use something along the lines of "css=a[href*='rid']".