title: Error with TKinter Attribute Simpledialog
body: <p>I'm currently trying to write in a few basic user input boxes using the tkinter module in Python 3.6 (via Spyder). I can confirm that the module loads, and that the option to select simpledialog comes up, but I keep getting the following error:</p>
  
  <p><strong><em>AttributeError: module 'tkinter' has no attribute 'simpledialog'</em></strong></p>
  
  <p><a href="https://i.stack.imgur.com/M10bi.png" rel="nofollow noreferrer">Image of tkinter simpledialog</a></p>
  
  <p>I've tried to look for other options, but other user input options do not seem to work on my Python interface. It either crashes, or the data isn't structured properly.</p>
  
  <p>Interestingly enough, in the past, I've done similar things in Python with no errors, but this keeps coming up with this particular programming piece.</p>
  
  <pre class="lang-py prettyprint-override"><code>import tkinter as tk
  import pyodbc as py
  py.pooling = False
  
  ## INPUT YOUR USER ID AND PASSWORD AND DECLARE YOUR CONNECTION
  ## THE DIALOG BOXES MAY POP OPEN ON ANOTHER SCREEN
  ## THE PASSWORD INPUT IS MASKED AND WILL NOT SHOW IN THE
  ## VARIABLE EXPLORER
  
  ID = tk.simpledialog.askstring("Please input your username.","Username: ")
  PW = tk.simpledialog.askstring("Please input your password.",
                                 "Password: ", show='*')
  CONN = tk.simpledialog.askstring("Please input your connection.",
                                   "Connection: ")
  </code></pre>
  
  <p>My expected results are that a popup window will appear and that I'll be able to get the user information I need to maintain a stable connection to the server I'm using.</p>
  
  <p>Thank you in advance for your advice!</p>