title: Tkinter percentage sizes?
body: <p>I am trying to build a small software with the Tkinter module and python but I can't figure out how to set a widget size with percentages instead of pixels. I could of course do it by grabbing the size of the entire window at every moment and divide by 2 to get a size of 50%, but is there a better way to do it with the Tkinter module?</p>
  
  <p>EDIT 1: To answer your questions I put my code here:</p>
  
  <pre><code>class Navbar:
      def __init__(self, master):
          self.maxsizeFrame = Frame(master, height = 50) #maxsize handler, prevent self.frame to grow too big
          self.maxsizeFrame.pack(fill = X, expand = NO)
          self.frame = Frame(self.maxsizeFrame)
          self.frame.pack(side = TOP, fill = BOTH, expand = YES)
          self.masteries = Button(self.frame, text = "Masteries")
          self.masteries.pack(side = LEFT, fill = BOTH, expand = YES)
          self.runes = Button(self.frame, text = "Runes")
          self.runes.pack(side = RIGHT, fill = BOTH, expand = YES)
  </code></pre>
  
  <p>So I want to create a navigation bar with two button handled in "self.frame". But I want this design to be responsive, that's why I set expand to "YES". However I wanted to set a maximum size for "self.frame" but the only way I found was to pack this frame in an other one ("self.maxsizeFrame") and set expand to "NO" on this one. And finally, I would like to set the maximum expand size to half the main window, so it could be great if the height of "self.maxsizeframe" could be in percentage. Thanks for reading.</p>
  
  <p>EDIT 2: 
  Actually it seems more efficient to build the software with the grid layout and the weight's option would be accurate.</p>