#!/usr/bin/env python3
# © 2015 James R. Barlow: github.com/jbarlow83
from subprocess import STDOUT, CalledProcessError, check_output
import sys
import os
import re
from functools import lru_cache
from . import ExitCode
@lru_cache(maxsize=1)
def version():
args_tess = [
'tesseract',
'--version'
]
try:
versions = check_output(
args_tess, close_fds=True, universal_newlines=True,
stderr=STDOUT)
except CalledProcessError:
print("Could not find Tesseract executable on system PATH.")
sys.exit(ExitCode.missing_dependency)
tesseract_version = re.match(r'tesseract\s(.+)', versions).group(1)
return tesseract_version
@lru_cache(maxsize=1)
def languages():
args_tess = [
'tesseract',
'--list-langs'
]
try:
langs = check_output(
args_tess, close_fds=True, universal_newlines=True,
stderr=STDOUT)
except CalledProcessError as e:
print("Tesseract failed to report available languages.")
print("Output from Tesseract:")
print("-" * 40)
print(e.output)
sys.exit(ExitCode.missing_dependency)
return set(lang.strip() for lang in langs.splitlines()[1:])
HOCR_TEMPLATE = '''
'''