Question

如何在python旧版本中使用有序词典？

Answer 1

我将使用jsonmerge合并您的json文件。它很好地处理了JSON文件的合并。

您可以使用pip install jsonmerge安装此库。

演示：

from json import loads
from json import dump

from jsonmerge import merge

# Store your json files here
# If all of them exist in directory, you can use os.listdir() instead
json_files = ['file1.json', 'file2.json']

with open('merged.json', 'w') as json_out:

    # Store updated results in this dict
    data = {}

    for file in json_files:
        with open(file, 'rb') as json_file:
            json_data = loads(json_file.read())

            # Update result dict with merged data
            data.update(merge(data, json_data))

    dump(data, json_out, indent=4)

其中给出了以下 merged.json ：

{
    "head-param": "foo",
    "head-param1": "bar",
    "head-sub-param": {
        "head-sub-param1": "foo",
        "head-sub-param2": "bar"
    },
    "body": {
        "name1": {
            "value": "foo",
            "option": "bar",
            "bar": "bar",
            "foo": "foo",
            "baz": "baz"
        },
        "name22": {
            "value1": "foo1",
            "option1": "bar1",
            "bar1": "bar1",
            "foo1": "foo1",
            "baz1": "baz1"
        }
    }
}

Answer 2

from collections import OrderedDict
from functools import partial
import json
import sys

if sys.version_info < (3,6):  # Pre Python 3.6?
    ordered_json_load = partial(json.load, object_pairs_hook=OrderedDict)
else:
    ordered_json_load = json.load

with open('file1.json') as finput1, open('file2.json') as finput2:

    # Merge data from files.
    merged = ordered_json_load(finput1)
    merged['body'].update(ordered_json_load(finput2)['body'].items())

# Write the merged data to an output file.
with open('output.json', 'w') as foutput:
    json.dump(merged, foutput, indent=4)

产生的输出文件的内容：

{
    "head-param": "foo",
    "head-param1": "bar",
    "head-sub-param": {
        "head-sub-param1": "foo",
        "head-sub-param2": "bar"
    },
    "body": {
        "name1": {
            "value": "foo",
            "option": "bar",
            "bar": "bar",
            "foo": "foo",
            "baz": "baz"
        },
        "name22": {
            "value1": "foo1",
            "option1": "bar1",
            "bar1": "bar1",
            "foo1": "foo1",
            "baz1": "baz1"
        }
    }
}

Answer 3

您可以编写一些递归函数：

def update_nested_dict(dict_1, dict_2):
    """Mutate dict_1 by updating it with all values present in dict_2."""
    for key, value in dict_2.items():
        if key not in dict_1:
            # Just add the value to dict_1
            dict_1[key] = value
            continue

        if isinstance(value, dict):
            # If this is a dict then let's recurse...
            update_nested_dict(dict_1[key], value)

调用update_nested_dict(json1, json2)会将json1更改为：

{'head-param': 'foo',
 'head-param1': 'bar',
 'head-sub-param': {'head-sub-param1': 'foo', 'head-sub-param2': 'bar'},
 'body': {'name1': {'value': 'foo',
   'option': 'bar',
   'bar': 'bar',
   'foo': 'foo',
   'baz': 'baz'},
  'name22': {'value1': 'foo1',
   'option1': 'bar1',
   'bar1': 'bar1',
   'foo1': 'foo1',
   'baz1': 'baz1'}}}

如何合并JSON文件？

3 个答案: