PyTesseract is an in-development python package for OCR.
Using PyTesseract is pretty easy:
try:
import Image
except ImportError:
from PIL import Image
import pytesseract
#Basic OCR
print(pytesseract.image_to_string(Image.open('test.png')))
#In French
print(pytesseract.image_to_string(Image.open('test-european.jpg'), lang='fra’))
PyTesseract is open source and can be found here.