parameters: (file_obj=None)
return_statement: return line
docstring: :param file_obj:  file object from which reading is done
          :returns: string containing one non empty line
function: def _get_one_line(file_obj=None):
          """
  
          :param file_obj:  file object from which reading is done
          :returns: string containing one non empty line
          """
          line = file_obj.readline().replace(" ", "").lower()
  
          while line and line == "":
              line = file_obj.readline().replace(" ", "").lower()
  
          return line
function_tokens: def _get_one_line ( file_obj = None ) : line = file_obj . readline ( ) . replace ( " " , "" ) . lower ( ) while line and line == "" : line = file_obj . readline ( ) . replace ( " " , "" ) . lower ( ) return line