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[英]Converting a dictionary with values as list of dictionaries into pandas DataFrame
[英]converting dataframe values into a particular json-style format (list of dictionaries)
我是 python 的新手,无法以 json 样式格式格式化输出。
我有一个数据框df
作为
col1 col2
0 ABC 2429
1 DEF 702
2 XYZ 2912
3 ABC 619
4 XYZ 3106
5 DEF 1511
我想生成一个字典列表,其中的输出应该是这样的:
[
{
"col1":"ABC",
"col2":[2429,619]
},
{
"col1":"DEF",
"col2":[702,1511]
},
{
"col1":"XYZ",
"col2":[2912,3106]
}
]
您可以按col1
分组,将col2
值聚合到列表中,最后生成一个 JSON:
In [64]: j = df.groupby('col1')['col2'].apply(list).reset_index().to_json(orient='records')
In [65]: j
Out[65]: '[{"col1":"ABC","col2":[2429,619]},{"col1":"DEF","col2":[702,1511]},{"col1":"XYZ","col2":[2912,3106]}]'
让它更好(人性化):
In [66]: print(json.dumps(json.loads(j), indent=2))
[
{
"col1": "ABC",
"col2": [
2429,
619
]
},
{
"col1": "DEF",
"col2": [
702,
1511
]
},
{
"col1": "XYZ",
"col2": [
2912,
3106
]
}
]
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