如何用python打印（）最后两个词用空格形成句子

Question

如何用python最后两个单词打印（）形成带空格的句子？比如“Hello world, there are 200 pcs”，我需要打印：“200 pcs”。太感谢了。sentence = "Hello world, there is 200 pcs"what_I_need = sentence.split()what_I_need[-3]# That prints "is"print(what_I_need)# But I need to print "is 200 pcs"

Answer 1

将拆分后的句子切片[-2:]将返回所需的输出。尝试：

sentence = "Hello world, there is 200 pcs"

what_I_need = sentence.split()

print(what_I_need[-2:]) # output: ['200', 'pcs']

# or as a string:

print(" ".join(what_I_need[-2:])) # output: 200 pcs

Answer 2

def get_last_n_words(n:int, sentence:string):

   last_n_Words = ' '.join(sentence.split()[-n:])

   return last_n_words

sentence = "Hello world, there is 200 pcs"

lastThreeWords = get_last_n_words(3, sentence)

# lasthreeWords: "is 200 pcs"

Answer 3

这是因为您在索引 -3 中打印了列表，您应该从末尾到索引 -3 获取所有元素，这样您就可以像之前提到的那样使用 : 运算符