How do I write a one-line generator for this Python 3.x list cycle?

How to make a generator of this cycle correctly?

I am a novice programmer, do not judge strictly, the Mentor asks me to write this cycle in one line

for post in posts:
    post_id_detail[post['id']] = post

I do this but it doesn’t work

post = [post_id_detail[post['id']] for post in posts]

Help to make the right generator in one line

>Solution :

post_id_detail is apparently a dict rather than a list, so use a dict comprehension instead:

post_id_detail = {post['id']: post for post in posts}

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