Add text on image with PIL module.

It's easy to create images with PIL module.
This is the script:

import PIL
from PIL import ImageFont
from PIL import Image
from PIL import ImageDraw
font = ImageFont.truetype("/usr/share/fonts/dejavu/DejaVuSans.ttf",25)
img=Image.new("RGBA", (200,200),(120,20,20))
draw = ImageDraw.Draw(img)
draw.text((0, 0),"This is a test",(255,255,0),font=font)
draw = ImageDraw.Draw(img)
draw = ImageDraw.Draw(img)
img.save("a_test.png")

The only error that can occur is not to find the font.
In this case you must change the code line:

font = ImageFont.truetype("/usr/share/fonts/dejavu/DejaVuSans.ttf",25)

Here is the result script: