title: How to pass Variable in Find_element_by_xpath
body: <p>I want to pass variables to driver.find_elemet_by_xpath</p>
  <p>when I use it like this it's ok</p>
  <pre><code>driver.find_element_by_xpath('xpath_String')
  </code></pre>
  <p>but when I use it like this it doesn't run successfully</p>
  <pre><code>Item = 'Xpath_string'
  driver.find_element_by_xpath(Item)
  </code></pre>