title: No module named tesseract
body: <p>Working on an OCR. I can import pytesseract and use image_to_string but I want to work on this:</p>
  
  <pre><code>api = tesseract.TessBaseAPI()
  api.SetVariable("tessedit_char_whitelist", "0123456789")
  api.Init('.','eng',tesseract.OEM_DEFAULT)
  api.SetPageSegMode(tesseract.PSM_AUTO)
  </code></pre>
  
  <p>This is to set tesseract to detect only numbers or alphabets.
  When I run my code I get this error:</p>
  
  <p><code>ImportError: No module named tesseract</code></p>
  
  <p>I have tesseract-ocr installed, and pytesseract as well. Yet I keep getting this error.</p>