title: _tkinter.TclError: Layout PViewStyle not found
body: <p>I am having trouble defining a Style for my Treeview widget.</p>
  
  <pre><code>newT=ttk.Style() 
  newT.configure('PViewStyle', rowheight=100) 
  PatrolView = ttk.Treeview(PatrolOverview,style='PViewStyle') 
  </code></pre>
  
  <p>but this yields </p>
  
  <pre><code>_tkinter.TclError: Layout PViewStyle not found
  </code></pre>