title: Auto increment line of the text file
body: <p>I have created normal gui program which reads the lines on the text files and show up in the text tk entry field. I want to auto increase the index of the line when I press the button, I am confused with while loop. The code what I did so far:</p>
  
  <pre><code>def forms(self):
  
          b = tk.Button(bd ='4', text="Auto Fill", width = 20, command = self.autosave)
          b.place (x=230, y=600)
  
          c = tk.Button(bd ='4', text="Clear", width = 20, command = self.clear)
          c.place (x=390, y=600)
  
          d = tk.Button(bd ='4', text="Exit", width = 20, command = self.close)
          d.place (x=550, y=600)
  
          #Form Feilds Starts from Here:
          self.date = tk.Label(font=('Arial', 13,'bold'), text = "Date: ",bg='white')
          self.date.place(x=10,y=50)
  
          self.ent_date = tk.Entry(bd='4',width='23')
          self.ent_date.place(x=60, y=50)
  
  
  def autosave(self):
          a = 0
          fp = open('image.txt')
          s = fp.readlines()
          line = s[a]
          self.ent_date.insert(0, line[0])
          box.showinfo('Success','Saved Successfully')
          while true:
              a += 1
  </code></pre>
  
  <p>The above code makes my program to freeze. How can I make the value of 'a' increase each time I click the autofill button..?
  Thanks in advance.!</p>