转储缩进的 JSON 时，如何抑制 output 数组中的换行符？

Question

我有这个代码：

import json

my_list = [1, 2, 3]
my_dict = {"key": "value", "boolean": True}
my_json = {"object": my_dict, "array": my_list}

print(json.dumps(my_json, indent=4))

我得到一个 output 像：

{
    "object": {
        "key": "value",
        "boolean": true
    },
    "array": [
        1,
        2,
        3
    ]
}

我希望"array"数组的元素出现在同一行，如下所示：

{
    "object": {
        "key": "value",
        "boolean": true
    },
    "array": [1, 2, 3]
}

我怎样才能得到这个结果？

Answer 1

你的任务可以通过使用像jsbeautifier这样的库来完成

使用以下命令安装库：

pip install jsbeautifier

然后添加选项并调用jsbeautifier.beautify()函数。

完整代码：

import json
import jsbeautifier


my_list = [1, 2, 3]
my_dict = {"key": "value", "boolean": True}
my_json = {"object": my_dict, "array": my_list}

options = jsbeautifier.default_options()
options.indent_size = 2
print(jsbeautifier.beautify(json.dumps(my_json), options))

输出：

{
  "object": {
    "key": "value",
    "boolean": true
  },
  "array": [1, 2, 3]
}

Answer 2

您不需要任何新模块来解决此问题。 JSON output 是字符串类型，您可以使用loop和if/elif/else来解决它，如下例所示：

import json

my_list = [1, 2, 3]
my_dict = {"key": "value", "boolean": True}
my_json = {"object": my_dict, "array": my_list}

json_dumps = json.dumps(my_json, indent=4)

str_to_write = ''
skip = 0
for char in json_dumps :
    if (skip == 1) and ((char == '\n') or (char == ' ')) :
        pass
    elif (char == '[') :
        skip = 1
        str_to_write = str_to_write + char
    elif (char == ']') :
        skip = 0
        str_to_write = str_to_write + char
    else :
        str_to_write = str_to_write + char

print(str_to_write)

不幸的是，它还去掉了列表中的空格字符。 output 是：

{
    "object": {
        "key": "value",
        "boolean": true
    },
    "array": [1,2,3]
}

使用regex模块，您可以保留空格：

import regex as re
import json

my_list = [1, 2, 3]
my_dict = {"key": "value", "boolean": True}
my_json = {"object": my_dict, "array": my_list}

json_dumps = json.dumps(my_json, indent=4)

start = [m.start() for m in re.finditer('\[', json_dumps)]
end = [m.start() + 1 for m in re.finditer('\]', json_dumps)]
original = []
alterated = []
for s, e in zip(start, end) :
    original.append(json_dumps[s:e])
    alterated.append(json_dumps[s:e].replace('\n', '').replace('    ', '').replace(',', ', '))
for o, a in zip(original, alterated) :
    json_dumps = json_dumps.replace(o, a)

print(json_dumps)

output：

{
    "object": {
        "key": "value",
        "boolean": true
    },
    "array": [1, 2, 3]
}