三歩あるけば物も忘れる

以下のjson形式のデータを辞書として利用して記載します。

json_data = {
             "s3": [
              {
                "s3SchemaVersion": "1.0",
                "configurationId": "aac92357-06c7-49ab-8aa3-86e163aa4e12",
                "bucket": {
                  "name": "s3-bucket",
                  "ownerIdentity": {
                    "principalId": "A10X0TF2OAHF1S"
                  }
                }
              }
            ]
          }

for k, v in json_data.items():
    pass
    
print(k, '\n', v)
# s3
# [{'s3SchemaVersion': '1.0', 'configurationId': 'aac92357-06c7-49ab-8aa3-86e163aa4e12', 'bucket': {'name': 's3-bucket', 'ownerIdentity': {'principalId': 'A10X0TF2OAHF1S'}}}]

v[0].keys()
# dict_keys(['s3SchemaVersion', 'configurationId', 'bucket'])

v[0].values()
# dict_values(['1.0', 'aac92357-06c7-49ab-8aa3-86e163aa4e12', {'name': 's3-bucket', 'ownerIdentity': {'principalId': 'A10X0TF2OAHF1S'}}])

key_list = list(v[0].keys())
key_list[0]
# 's3SchemaVersion'

for _ in list(v[0].keys()):
    print(_)
# s3SchemaVersion
# configurationId
# bucket

value_list = list(v[0].values())
value_list[0]
# '1.0'

for _ in list(v[0].values()):
    print(_)
# 1.0
# aac92357-06c7-49ab-8aa3-86e163aa4e12
# {'name': 's3-bucket', 'ownerIdentity': {'principalId': 'A10X0TF2OAHF1S'}}