筛选包含Python中某些字符的Json键

Question

我需要过滤这个字典(书-1，书-2和书-3)中的所有键，这些键可以共享字符串“book”，并保存在一个新的字典中。在这个例子中，我不需要下载‘自行车’。

import json

# some JSON file:
jInfo = '{"store":{"book-1":[{"category":"reference","author":"Nigel Rees","title":"Sayings of the Century","price":8.95},{"category":"fiction","author":"Evelyn Waugh","title":"Sword of Honour","price":12.99},{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99}],"book-2":[{"category":"reference","author":"Nigel Rees","title":"Sayings of the Century","price":8.95},{"category":"fiction","author":"Evelyn Waugh","title":"Sword of Honour","price":12.99},{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99}],"book-3":[{"category":"reference","author":"Nigel Rees","title":"Sayings of the Century","price":8.95},{"category":"fiction","author":"Evelyn Waugh","title":"Sword of Honour","price":12.99},{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99}],"bicycle":{"color":"red","price":19.95}}}'

# parse jsonObject:
info = json.loads(jInfo)

# the result is a Python dictionary:
print(info["store"]["book-1"][0])

Answer 1

这可以通过dict理解来实现，可以根据所需的过滤器进行更新：

new_dict = {key: value for key, value in info['store'].items() if "book" in key}