title: Alignment of the widgets in Python Tkinter
body: <p>I'm going crazy with this stupid problem. As you can see in running this simple code, the "combobox" widget is not in line with the other "entry" widgets. Where am I wrong?</p>
  
  <pre><code>from tkinter import *
  from tkinter import ttk
  
  root = Tk()
  
  frame = Frame(root)
  frame.grid()
  
  x = Label(frame, text="alpha", width = 8, anchor = W)
  x.grid(row=1, columnspan=1)
  x = Entry(frame,  width = 24)
  x.grid(row=1, column=2, columnspan=2,  sticky=W)
  
  x = Label(frame, text="beta", width = 8, anchor = W)
  x.grid(row=2, columnspan=1)
  x = Entry(frame,  width = 24)
  x.grid(row=2, column=2, columnspan=2,  sticky=W)
  
  x = Label(frame, text="gamma", width = 8, anchor = W)
  x.grid(row=3, columnspan=1)
  x = Entry(frame, width = 7, justify = 'center')
  x.grid(row=3, column=2, columnspan=1, sticky=W)
  #x = ttk.Combobox(frame, width = 4, justify = "center")
  #x.grid(row=3, column=3, columnspan=1, sticky=W)
  
  x = Label(frame, text="delta", width = 8, anchor = W)
  x.grid(row=4, columnspan=1)
  x = ttk.Combobox(frame, width=20)
  x.grid(row=4, column=2, columnspan=2,  sticky=W)
  
  x = Label(frame, text="epsilon", width = 8, anchor = W)
  x.grid(row=5, columnspan=1)
  x = Entry(frame,  width = 24)
  x.grid(row=5, column=2, columnspan=2,  sticky=W)
  
  mainloop()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/jtse4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jtse4.png" alt="enter image description here"></a></p>