python - 如何从字典中造句

Question

我正在尝试编写一些代码，让用户输入一个句子，将句子转换为字典，然后使用字典恢复原始句子。

代码:

import json
def code():
    sentence = input("Please write a sentence: ") 
    dictionary = {v: k for k,v in enumerate(sentence.split(), start=1)}   
    with open('Dict.txt', 'w') as fp:
        json.dump(dictionary, fp)
    print(dictionary) 
    puncList = ["{","}",",",":","'","[","]","1","2","3","4","5"]
    for i in puncList:
        for sentence in dictionary:
            dictionary=[sentence.replace(i," ") for sentence in dictionary]
    print(' '.join(dictionary))
code()

输入:

Hello my name is Bob

实际输出:

{'Hello' : '1', 'name' : '3', 'Bob' : '5', 'my' : '2', 'is' : '4'}
Hello name Bob my is

期望的输出:

{'Hello' : '1', 'name' : '3', 'Bob' : '5', 'my' : '2', 'is' : '4'}
Hello my name is Bob

这样也行:

{'Hello' : '1', 'my' : '2', 'name' : '3', 'is' : '4', 'Bob' : '5'}
Hello my name is Bob

对于我重新创建原始句子的部分，它不能只打印句子，它必须来自字典。

Answer 1

您需要使用 OrderedDict 来保留元素顺序，或者在打印之前对字典元素进行排序。您已经有了一个 OrderedDict 答案，下面是如何使用您创建的字典:

print(' '.join(k for (k, v) in sort(dictionary.items(), key=lambda x: x[1])))

顺便说一句，你的方法有一个错误:如果你将它应用于一个有重复单词的句子，例如，“boys will be boys”，你会发现没有索引为 1 的元素(boys, 4) 之后的字典将覆盖 (boys, 1)。