如何创建一个对象，将词汇中单词的映射存储到其索引中？(How to create an object which stores mappings from a word in a vocabulary to its index?)

 我在词汇表中有一个标记化的单词列表。 （它已经通过了一套，所以没有重复。） 
 
 我的问题 
 
 我想要生成一个方法来创建一个允许从词汇到词汇索引的映射的词典。 
 
 我的尝试 
 
 我目前的方法是这样的： 
 
mapping = { w : vocabulary.index(w) for w in vocabulary }
 
 这应该可行，但效率太低，可能是因为反复使用vocabulary.index（w）数千字。 
 
 题 
 
 有没有我可以使用的库，可以更高效地执行此操作？ 或者只是更有效的方法？ 
 
 谢谢。 
 
 可能的解决方案1 
 
 目前，每次在'词汇表'中达到一个单词时，词汇表将被实现，这需要通过'词汇表'来识别索引，这是针对每个单词完成的。 正如答案中所建议的那样，可能首先列举'词汇'。 这允许通过它来识别索引，如下所示： 
 
mapping = { w : i for i, w in enumerate(vocabulary) }

I have a tokenized list of words in a vocabulary. (It's been passed through a set, so there are no duplicates.)
 
My problem
 
I want to generate a method which creates a dictionary that allows a mapping from the word to its index in the vocabulary.
 
My attempt
 
My current method is like so:
 
mapping = { w : vocabulary.index(w) for w in vocabulary }
 
This should work but it is far too inefficient, probably due to repeatedly using vocabulary.index(w) for thousands of words. 
 
Question
 
Is there a library that I can use that does this more efficiently? Or just more efficient methods?
 
Thanks.
 
POSSIBLE SOLUTION 1
 
Currently, each time a word is reached in 'vocabulary', vocabulary.index() is implemented, which required a pass through 'vocabulary' to identify the index, which is done for every word. As suggested in an answer, a possibility is to enumerate 'vocabulary' first. This allows one pass through it to identify the index, like so:
 
mapping = { w : i for i, w in enumerate(vocabulary) }

原文：https://stackoverflow.com/questions/48842567