title: Tkinter default font is tiny
body: <p>I am using some libraries that are using tkinter, and the font is so tiny I can't read it (a few pixels only). Here is a minimum working example:</p>
  <pre><code>from tkinter import *                                                                                                                           
  root = Tk()
  myLabel = Label(root, text = 'Hello, world!')
  myLabel.pack()
  root.mainloop()
  </code></pre>
  <p>The working example produces the tiny hello world in the window to the right: <a href="https://i.stack.imgur.com/Crrql.png" rel="nofollow noreferrer">mwe tiny font</a>
  The rest of the image is showing the gitk gui as a size reference.</p>
  <p>Is there a way to set the default font size in tkinter without changing the code? It could also be a problem with dpi settings?</p>
  <p>I am on Arch linux, i3wm, using the nvidia proprietary driver</p>