title: Openalpr directory error
body: <p>I tried python code with openalpr library to identify number plate. When I try to get plate number I got following error.</p>
  
  <pre><code>Warning: You are running an unsupported version of Tesseract.
  Expecting at least 3.03, your version is: 3.02.02
  Error opening data file /usr/local/share/tessdata/lus.traineddata
  Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
  Failed loading language 'lus'
  Tesseract couldn't load any languages!
  </code></pre>
  
  <p>This is a my code which I get from <a href="https://github.com/openalpr/openalpr" rel="nofollow">Here</a> </p>
  
  <pre><code>from openalpr import Alpr
  
  alpr = Alpr("us", "/etc/openalpr/openalpr.conf", "/home/pi/openalpr/runtime_data/")
  if not alpr.is_loaded():
      print("Error loading OpenALPR")
      sys.exit(1)
  
  alpr.set_top_n(20)
  alpr.set_default_region("md")
  
  results = alpr.recognize_file("/home/pi/ea7the.jpg")
  
  i = 0
  for plate in results['results']:
      i += 1
      print("Plate #%d" % i)
      print("   %12s %12s" % ("Plate", "Confidence"))
      for candidate in plate['candidates']:
          prefix = "-"
          if candidate['matches_template']:
              prefix = "*"
  
          print("  %s %12s%12f" % (prefix, candidate['plate'], candidate['confidence']))
  
  # Call when completely done to release memory
  alpr.unload()
  </code></pre>
  
  <p>How to solve this error? </p>