title: Python tkinter Combobox
body: <p>I want to fill my entries when I click in a name of my Combobox without buttons like 'check' to show the values. How can i do that?</p>
  
  <pre><code>import tkinter as tk
  from tkinter import ttk
  import csv
  
  root = tk.Tk()
  cb = ttk.Combobox(root,state='readonly')
  labName = ttk.Label(root,text='Names: ')
  labTel = ttk.Label(root,text='TelNum:')
  labCity = ttk.Label(root,text='City: ')
  entTel = ttk.Entry(root,state='readonly')
  entCity = ttk.Entry(root,state='readonly')
  
  with open('file.csv','r',newline='') as file:
      reader = csv.reader(file,delimiter='\t')    
  
  
  cb.grid(row=0,column=1)
  labName.grid(row=0,column=0)
  labTel.grid(row=1,column=0)
  entTel.grid(row=1,column=1)
  labCity.grid(row=2,column=0)
  entCity.grid(row=2,column=1)
  </code></pre>