python 2.7 - 'list' object has no attribute 'items' -

working on ubuntu 12.04, python 2.7 have error 'list' object has no attribute 'items' when call print_to_screen function. explain me please how manage dictionary created?

class median_uniq: def init(self): self.median_number_list = []

def print_to_screen(self, words_dict, is_reverse = false):     words = words_dict.items()     words.sort(key = lambda(a,b):(a,b), reverse = is_reverse)     print("[words tweeted: %d]" % len(words)).center(60,"=")     print("%-25s | %25s" % ("words", "count"))     print banner     w, c in words:         print("%-25s | %25d" % (w, c))  def median_number(self, file_name):     file_object = open(file_name, "r")     number_word_list = []     line in file_object:        unique_words_per_tweet = sorted(set(line.rstrip().split(" ")))        number_word_list.append(len(counter((unique_words_per_tweet))))        self.median_number_list.append(numpy.median(numpy.array(number_word_list)))        print self.median_number_list        return  self.median_number_list 

to call function, this:

med = median_uniq() med_list = med.median_number(input_file)

med.print_to_screen(med_list, is_reverse = false)

on command line knowing input_file .txt file. thanks

i have seen similar post, don't understand. explanation words helpful. thanks

"words_dict" in code list, attempt use python dictionary method (items())

i need working example able propose customized solution.