title: Tkinter after method executing immediately
body: <p>The TKinter 'after' method is executing immediately, then pausing for the 3 second time after execution. If I also use the 'after' method in my CheckStatus function, it goes onto a rapid loop and never gets to the mainloop().</p>
  
  <p>What am I doing wrong? the documentation says the function would be called after the pause time, but its actually happening before. I want to call CheckStatus every second for a hardware input on Raspberry Pi, as well as have the normal mainloop responding to user events.</p>
  
  <pre><code>from tkinter import *
  
  def DoClick(entries):
      global ButCount
      ButCount += 1
      print("ButCount", ButCount, "TimeCount", TimeCount)
  
  def newform(root):
      L1 = Label(root, text = "test of 'after' method which seems to call before time")
      L1.pack()
  
  def CheckStatus():
      global TimeCount
      TimeCount += 1
      print("In CheckStatus. ButCount", ButCount, "TimeCount", TimeCount)
      # root.after(3000, DoTime())
  
  
  root = Tk()
  ButCount = 0
  TimeCount = 0
  
  if __name__ == '__main__': 
      FormData = newform(root)
      root.bind('&lt;Return&gt;', (lambda event, e=FormData: fetch(e)))   
      b1 = Button(root, text='Click me', command=(lambda e=FormData: DoClick(e)))
      b1.pack()
  
      print("Before root.after(")
      root.after(3000, CheckStatus())
      print("Done root.after(")
      root.mainloop()
  </code></pre>