title: Tkinter , 'module' object has no attribute 'Frame'
body: <p>i write a hello world app in tkinter python, but i recive next message: 'module' object has no attribute 'Frame'</p>
  
  <pre><code>import _tkinter as tk
  </code></pre>
  
  <p>here is the error</p>
  
  <pre><code>class Application(tk.Frame):
      def __init__(self, master=None):
          tk.Frame.__init__(self, master)
          self.pack()
          self.createWidgets()
      def createWidgets(self):
          self.hi_there = tk.Button(self)
          self.hi_there["text"] = "Hello World\n(click me)"
          self.hi_there["command"] = self.say_hi
          self.hi_there.pack(side="top")
  
          self.QUIT = tk.Button(self, text="QUIT", fg="red",
                                          command=root.destroy)
          self.QUIT.pack(side="bottom")
  
      def say_hi(self):
          print("hi there, everyone!")
  
  root = tk.Tk()
  app = Application(master=root)
  app.mainloop()
  </code></pre>
  
  <p>why this are happening? </p>