下面是一个使用enumerate()向每个字典添加新键的示例：

import json

original_json_text = """[
    {"Name": "a1", "Notes": "b1", "Active": "c1"},
    {"Name": "a2", "Notes": "b2", "Active": "c2"},
    {"Name": "a3", "Notes": "b4", "Active": "c3"}
]"""

data = json.loads(original_json_text)

data = [{"id": i, **d} for i, d in enumerate(data)]

print(json.dumps(data, indent=4, sort_keys=False))

图纸：

[
    {
        "id": 0,
        "Name": "a1",
        "Notes": "b1",
        "Active": "c1"
    },
    {
        "id": 1,
        "Name": "a2",
        "Notes": "b2",
        "Active": "c2"
    },
    {
        "id": 2,
        "Name": "a3",
        "Notes": "b4",
        "Active": "c3"
    }
]

完整的例子，有一些评论：

import json

# with open is important to close the file regardless of result 
with open('my_file.json') as f:
    # here we read the file and use json module to unpack
    content = json.loads(f.read())

# list comprehension, merge 2 dictionaries and enumerate, you can read more about those)
content = [{"id": index, **obj} for index, obj in enumerate(content)]

您可以使用JSON库相当简单地做到这一点。

import json

json_array = json.loads('''
    [
        {
            "Name": "a1",
            "Notes": "b1",
            "Active": "c1"
        },
        {
            "Name": "a2",
            "Notes": "b2",
            "Active": "c2"
        },
        {
            "Name": "a3",
            "Notes": "b4",
            "Active": "c3"
        }
    ]
''')

for i, d in enumerate(json_array):
    d["id"] = i

print(json.dumps(json_array))

这将把json代码解析成一个python对象，然后遍历数组并添加id字段。