python - Generate a list from list of dicts if value not exists in another list

Question

Closed. This question needs details or clarity. It is not currently accepting answers. question from:https://stackoverflow.com/questions/65887235/generate-a-list-from-list-of-dicts-if-value-not-exists-in-another-list

Answer 1

c = [item for item in a if item["item_id"] not in b]

Will be better to make "b" as a set in case of a large amount of items.