title: Button not showing up in Tkinter, even w/ geometry manager
body: <p>I'm designing an app in tkinter, but there is a button that won't show up. The button is crucial to the program's operation.</p>
  
  <pre class="lang-py prettyprint-override"><code>import tkinter as tk
  
  global field
  
  root = tk.Tk()
  root.resizable(0,0)
  
  root.geometry('368x200')
  
  header = tk.Label(root, text = 'Header Text', pady=20)
  header.config(font = ('Tahoma', 24))
  header.grid(row = 0, columnspan=2)
  
  enter_here = tk.Label(root, text = 'Question: ')
  enter_here.grid(row = 1, column = 0, pady = 50)
  field = tk.Entry(root, width = 50)
  field.grid(row = 1, column = 1, pady = 50)
  
  answer = tk.Button(root, text = 'Answer', command = answerf, width=10)
  answer.grid(row=2, column=2)
  
  root.mainloop()
  </code></pre>
  
  <p>Title, header text and the letters are all placeholders. I just need to figure out how to use the button. I've looked around and couldn't find any answers; most people had just forgot a geometry manager.</p>