Create picture of 'Number, Decimal Digit' from unicode table

unicode_decimal_to_image.py

import sys
import unicodedata
from collections import defaultdict

from PIL import ImageFont, ImageDraw, Image

# Steal from https://stackoverflow.com/questions/14245893/efficiently-list-all-characters-in-a-given-unicode-category
def number_decimal_digit():
    unicode_category = defaultdict(list)
    # very expensive here
    for c in map(chr, range(sys.maxunicode + 1)):
        unicode_category[unicodedata.category(c)].append(c)
        
    return unicode_category['Nd'] # Number Decimal Digit
    

def draw_font_image(word_to_draw, filename):
    font_full_path = "/path/to/your/font.ttf"
    full_path = "/tmp/draw_font/{}.png".format(filename)
    
    W, H = 1000, 250
    
    img = Image.new("RGBA", (W, H), (255, 255, 255))
    draw = ImageDraw.Draw(img)
    font = ImageFont.truetype(font_full_path, 48)
    
    #w, h = draw.textsize(word_to_draw)
    
    draw.text((0, H/2), word_to_draw, (0, 0, 0), font=font)
    draw = ImageDraw.Draw(img)
    
    print("Saving....")
    print(full_path)
    img.save(full_path)
    print("Done.")
    
number_decimal = number_decimal_digit()

# Loop 0-9 number for each language
for i in range(0, len(number_decimal), 10):
    word_to_draw = " ".join(number_decimal[i:i+10])
    
    if i == 0:
        file_name = ''.join(unicodedata.name(number_decimal[i]).split(' ')[0])
    else:
        file_name = ''.join(unicodedata.name(number_decimal[i]).split(' ')[:-2])
        
    draw_font_image(word_to_draw, file_name)
    #print(word_to_draw, file_name)