Failure loading language 'osd' in python3

[Reuben Cummings]

Using the capi and python3, the 'osd' language file fails to load. It works fine with python2. I'm using mac osx 10.9.5.

code:

#!/usr/bin/python
# -*- coding: utf-8 -*-

from __future__ import print_function, division, absolute_import

from os import environ
from ctypes import CDLL, POINTER, Structure, c_char_p, c_bool
from ctypes.util import find_library

LIBTESS = find_library('libtesseract')
LIBLEPT = find_library('liblept')
TESSDATA_PREFIX = environ.get('TESSDATA_PREFIX', '/opt/local/share')


class TessBaseAPI(Structure):
    pass


class Pix(Structure):
    pass


class TessPageIterator(Structure):
    pass


def create_tess_api(prefix=TESSDATA_PREFIX):
    tesseract = CDLL(LIBTESS)
    leptonica = CDLL(LIBLEPT)
    base_api = POINTER(TessBaseAPI)
    p_iter = POINTER(TessPageIterator)
    argtypes = [base_api, c_char_p, c_char_p]

    tesseract.TessBaseAPICreate.restype = base_api
    tesseract.TessBaseAPIInit3.argtypes = argtypes
    tesseract.TessBaseAPIInit3.restype = c_bool
    tesseract.TessBaseAPISetImage2.restype = None
    tesseract.TessBaseAPISetImage2.argtypes = [base_api, POINTER(Pix)]
    tesseract.TessBaseAPIAnalyseLayout.argtypes = [base_api]
    tesseract.TessBaseAPIAnalyseLayout.restype = p_iter

    api = tesseract.TessBaseAPICreate()
    tesseract.TessBaseAPIInit3(api, prefix.encode('utf-8'), b'eng')

    leptonica.pixRead.argtypes = [c_char_p]
    leptonica.pixRead.restype = POINTER(Pix)
    return tesseract, leptonica, api

tesseract, leptonica, api = create_tess_api()
path = b'eurotext.tif'
tesseract.TessBaseAPISetPageSegMode(api, 1)
pix = leptonica.pixRead(path)
tesseract.TessBaseAPISetImage2(api, pix)
print(tesseract.TessBaseAPIAnalyseLayout(api))

tesseract 3.04.00
 leptonica-1.71
  libgif 4.2.3 : libjpeg 9a : libpng 1.6.21 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.5.0 : libopenjp2 2.1.0

[Reuben Cummings]

output when file is run with python2

<__main__.LP_TessPageIterator object at 0x102369950>

output when file is run with python3

Failed loading language 'osd'
Tesseract couldn't load any languages!
Warning: Auto orientation and script detection requested, but osd language failed to load
<__main__.LP_TessPageIterator object at 0x10194b950>

Also, I know it is finding the tessdata folder because when I change the prefix value, it gives the following error in both python2 and 3:

Error opening data file ./tessdata/eng.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language 'eng'
Tesseract couldn't load any languages!
Segmentation fault: 11