如何以特定表格格式投影数据？答案

【问题标题】：How to project data in a particular table format?如何以特定表格格式投影数据？
【发布时间】：2022-01-13 02:46:08
【问题描述】：

JSON/字典数据

data = {"outer_level_key": [{
        "random1": "",
        "url": "",
        "software": [{
            "name": "a123",
            "version": "some_version_a123"
        }],
        "memory": 72,
    },
    {
        "random1": "",
        "url": "",
        "software": [{
                "name": "a456",
                "version": "some_version_a456"
            },
            {
                "name": "a789",
                "version": "some_version_a789"
            },
            {
                "name": "b123",
                "version": "some_version_b123"
            }
        ],
        "memory": 500
    }}

我想以以下格式打印所有可用数据name 和version

++++++++++++++++++++++
name.   | version.    |
+++++++++++++++++++++++
+ a123.  |some_version_a123|
+---------------------------
+ a456.  | some_version_a456|
+----------------------------

任何更好的可读性表会更好。你能帮帮我吗？

【问题讨论】：

标签： python python-3.x dictionary

【解决方案1】：

这是一种方法。

(i) 遍历data并收集相关数据并使用dict.setdefault将它们合并到key上以创建out

(ii) 将 out 从 (i) 传递给 DataFrame 构造函数。

out = {}
for outer_dict in data['outer_level_key']:
    for inner_dict in outer_dict['software']:
        for k, v in inner_dict.items():
            out.setdefault(k, []).append(v)
df = pd.DataFrame(out)

输出：

   name            version
0  a123  some_version_a123
1  a456  some_version_a456
2  a789  some_version_a789
3  b123  some_version_b123

【讨论】：

谢谢恩克。这很完美，我尝试过这种熊猫方法。任何带有表格设计和边框的东西（只是为了突出这些特定数据）？
@Learner 是的，您可以玩弄桌子设计。您可以在docs 中了解更多信息

【解决方案2】：

我认为这是你想要的：

# main.py
print("++++++++++++++++++++++")
print("name.   | version.    |")
print("++++++++++++++++++++++")

for softwares in data["outer_level_key"]:
    for software in softwares["software"]:
        print(f"+ {software['name']}  | {software['version']}|")
        print("+---------------------------")

输出：

++++++++++++++++++++++
name.   | version.    |
++++++++++++++++++++++
+ a123  | some_version_a123|
+---------------------------
+ a456  | some_version_a456|
+---------------------------
+ a789  | some_version_a789|
+---------------------------
+ b123  | some_version_b123|
+---------------------------

【讨论】：

这很聪明 :)，谢谢。但是调整桌子的设计和宽度很多都不是用这个来实现的。

【解决方案3】：

也可以这样做。

data_dict = {
    "outer_level_key": [
        {
            "random1": "",
            "url": "",
            "software": [{
                "name": "a123",
                "version": "some_version_a123"
            }],
            "memory": 72,
        },
        {
            "random1": "",
            "url": "",
            "software": [
                {
                    "name": "a456",
                    "version": "some_version_a456"
                },
                {
                    "name": "a789",
                    "version": "some_version_a789"
                },
                {
                    "name": "b123",
                    "version": "some_version_b123"
                }
            ],
            "memory": 500
        }]
}
print(f"{'name':<8}  | {'version':<20}")
print(f"{'-' * 9:<8} + {'-' * 20:<20}")
for software_dict in data_dict['outer_level_key']:
    for software in software_dict["software"]:
        print(f"{software['name']:<8}  | {software['version']:<20}")

输出：

name      | version             
--------- + --------------------
a123      | some_version_a123   
a456      | some_version_a456   
a789      | some_version_a789   
b123      | some_version_b123

【讨论】：