title: How to check if all items in list are string
body: <p>If I have a list in python, is there a function to tell me if all the items in the list are strings?</p>
  
  <p>For Example:
  <code>["one", "two", 3]</code> would return <code>False</code>, and <code>["one", "two", "three"]</code> would return <code>True</code>.</p>