如何从 Python 中 JSON 中的所有键实例中获取值

Question

I have a response from a post request:

JSON RESPONSE:

[ { "a": 3, "b": 2, "c": 1, }, { "a": 3, "b": 2, "c": 1 } ]

How would I get the value from all instances of "c" and add it to an array? What I have now is:

all_C_Values= []

for entry in JSON_RESPONSE['c'].values()]
    print("Adding element:")
    print(element)
    all_C_Values.append(element)

This doesn't give me the answer I need though. Ideally the array would contain values [1,1].

If I loop through the response and try to append the value, I get:

TypeError: the JSON object must be str, bytes or bytearray, not list

Answer 1

Try this:

D = [ { "a": 3, "b": 2, "c": 1, }, { "a": 3, "b": 2, "c": 1 } ]
x = [x['c'] for x in D]
print(x)

Answer 2

You are getting that error because you cannot treat JSON as a dictionary yet, you must load it first

import json

response = json.loads(JSON_RESPONSE)
all_C_values = [dic['c'] for dic in response]