python字典使用

编程统计键盘输入的字符串中以空格分隔的单词共有多少个，不重复的单词是哪些

words = input("请输入一句话: ")
word_list = words.split()
num_words = len(word_list)
unique_words = set(word_list)
num_unique_words = len(unique_words)

print("单词总数为:", num_words)
print("不重复的单词数为:", num_unique_words)
print("不重复的单词是:", unique_words)