Font metrics test

import pygame
from glob import glob
pygame.init()

testchars = [chr(x) for x in range(32,127)]

def runtest(fontname, fontsize):
    font = pygame.font.Font(fontname, fontsize)
    advances_by_char = dict((ch, font.metrics(ch)[0][4]) for ch in testchars)
    chars_by_advance = dict((value, []) for value in advances_by_char.values())
    for ch in testchars:
        chars_by_advance[advances_by_char[ch]].append(ch)
    print "{0} at pixel size {1}, advances:".format(fontname, fontsize)
    for advance, chars in chars_by_advance.items():
        print "   {0} for {1} characters: {2}".format(advance, len(chars), ''.join(chars))
    print ""


for fname in glob('*.ttf'):
    runtest(fname, 16)
    runtest(fname, 100)
    runtest(fname, 200)
    runtest(fname, 300)