code: def _wordAfterCursor(self):
          
          cursor = self._qpart.textCursor()
          textAfterCursor = cursor.block().text()[cursor.positionInBlock():]
          match = _wordAtStartRegExp.search(textAfterCursor)
          if match:
              return match.group(0)
          else:
              return ''
docs: Get word, which is located before cursor