[英]Convert Multi-Index Pandas Dataframe to JSON
考慮一個熊貓DataFrame
用MultiIndex
:
virtual_device_135 virtual_device_136
tag_5764 tag_5764
timestamp
31/03/2020 02:10:30 -0.97 NaN
31/03/2020 02:10:35 NaN 0.98
31/03/2020 02:10:40 -0.97 NaN
31/03/2020 02:10:45 NaN -0.98
31/03/2020 02:10:50 -0.97 NaN
上面的DataFrame
需要轉換成json
格式,如下所示:
bodyContent": [
{
"time": "31/03/2020 02:17:01",
"tag_5764_virtual_device_135": -0.97
},
{
"time": "31/03/2020 02:17:12",
"tag_5764_virtual_device_135": -0.97
},
{
"time": "31/03/2020 02:17:22",
"tag_5764_virtual_device_135": -0.97
},
{
"time": "31/03/2020 02:18:37",
"tag_5764_virtual_device_136": -0.98
},
{
"time": "31/03/2020 02:18:47",
"tag_5764_virtual_device_136": -0.98
},
{
"time": "31/03/2020 02:18:57",
"tag_5764_virtual_device_136": -0.98
}
]
目前,我正在拆分 DF,然后重命名列,然后合並它,然后轉換為 json。
我可以在 Pandas 中使用更好的方法嗎?
任何幫助表示贊賞!
我發現它可以按以下方式完成:
如果DataFrame
是 df:
df.columns = ['_'.join(col) for col in df.columns]
df.reset_index(inplace=True)
df_list = json.loads(df.to_json(orient='records'))
for each in df_list:
body_content_list.append(each)
希望這對某人有用。
df.columns = ['_'.join(col[::-1]) for col in df.columns] df = df.reset_index().rename(columns = {'timestamp': 'time'}) jsonbody = list({k: {k1:v1 for k1,v1 in v.items() if pd.notnull(v1)} \ for k, v in df.to_dict(orient= 'index').items()}.values())
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