Question

如何解析嵌套的JSON？下面是一个示例：我们捕获了3个参数，分别是timeStamp和value。

输入JSON：

{ “ Sensor”：“ seda_01”， “位置”： { “城市”：“洛杉矶”， “州”：“ CA” }， “ rain_value”：[ [ “ 1564073521”， “ 0.02” ]， [ “ 1564073522”， “ 0.01” ]， [ “ 1564073523”， “ 0.03” ] ]， “ sun_value”：[ [ “ 1564073521”， “ 0.11” ]， [ “ 1564073522”， “ 0.10” ]， [ “ 1564073523”， “ 0.13” ] ]， “ wind_value”：[ [ “ 1564073521”， “ 0.21” ]， [ “ 1564073522”， “ 0.21” ]， [ “ 1564073523”， “ 0.23” ] ] }

输出dataframe：

| Sensor| Location_City | Location_Sate| Rain_value_TS | Rain_value | Sun_value_TS | Sun_value |
------------------------------------------------------- ----------------
|  seda_01 | Los Angeles | CA | 1564073521 | 0.02 | 1564073521 | 0.11 |
|  seda_01 | Los Angeles | CA | 1564073522 | 0.01 | 1564073522 | 0.10 |

Codelt的一次尝试如下

import pandas as pd
from flatten_json import flatten
jsonDict = {'Sensor':'seda_01', 'Location':{'City':'Los Angeles','State':'CA'}, 'rain_value':[ ['1564073521', '0.02'],['1564073522', '0.01'],['1564073523', '0.03'] ],'sun_value':[ ['1564073521', '0.11'],['1564073522', '0.10'],['1564073523', '0.13'] ] , 'wind_value':[ ['1564073521', '0.21'],['1564073522', '0.21'],['1564073523', '0.23'] ]}
dic_flattened = (flatten({k:v}) for k,v in jsonDict.items())
df = pd.DataFrame(dic_flattened)
df.head()

但是输出是用Lot NAN捕获的

Answer 1

我有commented链接到我尝试的代码，因为OP在使用它时没有给我以荣誉。我决定将其发布为答案。

我的尝试，这仍然不是答案，但会有所帮助。

import pandas as pd
from flatten_json import flatten

jsonDict = {'Sensor':'seda_01', 'Location':{'City':'Los Angeles','State':'CA'}, 'rain_value':[ ['1564073521', '0.02'],['1564073522', '0.01'],['1564073523', '0.03'] ],'sun_value':[ ['1564073521', '0.11'],['1564073522', '0.10'],['1564073523', '0.13'] ] , 'wind_value':[ ['1564073521', '0.21'],['1564073522', '0.21'],['1564073523', '0.23'] ]}

dic_flattened = (flatten({k:v}) for k,v in jsonDict.items())

df = pd.DataFrame(dic_flattened)

print(df)

df.to_csv('output.csv',index=False)

输出：

Sensor,Location_City,Location_State,rain_value_0_0,rain_value_0_1,rain_value_1_0,rain_value_1_1,rain_value_2_0,rain_value_2_1,sun_value_0_0,sun_value_0_1,sun_value_1_0,sun_value_1_1,sun_value_2_0,sun_value_2_1,wind_value_0_0,wind_value_0_1,wind_value_1_0,wind_value_1_1,wind_value_2_0,wind_value_2_1
seda_01,,,,,,,,,,,,,,,,,,,,
,Los Angeles,CA,,,,,,,,,,,,,,,,,,
,,,1564073521,0.02,1564073522,0.01,1564073523,0.03,,,,,,,,,,,,
,,,,,,,,,1564073521,0.11,1564073522,0.10,1564073523,0.13,,,,,,
,,,,,,,,,,,,,,,1564073521,0.21,1564073522,0.21,1564073523,0.23

查看实际情况here

将嵌套的JSON展平为多行

1 个答案: