def getIDFValue():
str = ''
word = request.args.get('zbor')
rows = IDFModel.query(IDFModel.word == word).fetch()
if rows is not None and len(rows) > 0:
str += 'IDF value for word %s is %f\n' % (word, rows[0].value)
else:
str += 'No IDF Value for word %s\n' % word
return Response(str, mimetype='text/plain')
