python change json data from a key string

Asked Feb 23 '15 at 10:28

Active Feb 23 '15 at 10:30

Viewed 26 times

I have a json data which has another json data as its values. I want to change the value of a key. Key is given with separator dot(.)

import json    
data1='{"name":"xxx","info":{"mark":{"sub1":"11","sub2":22,"sub3":{"sub31":22,"sub32":44}}},"avg":33.33}'
data=json.loads(data1)
key="info.mark.sub3.sub32"
value=98

How can i change the value of the key without doing like this data["info"]["mark"]["sub3"]["sub32"]=value ?

edited Feb 23 '15 at 10:30

Martijn Pieters

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asked Feb 23 '15 at 10:28

Dinoop Nair

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Split on the dot (`key.split('.')`) and use the `reduce()` approach I linked you to. – Martijn Pieters Feb 23 '15 at 10:31
I'm not sure reduce can be used to set the value, so I just put this here keys = key.split('.') res = data for i, k in enumerate(keys): if k in res: if i == len(keys) - 1: res[k] = value else: res = res[k] – bpgergo Feb 23 '15 at 10:42
@MartijnPieters i got the values using reduce() function. But i couldnt set the values. – Dinoop Nair Feb 23 '15 at 10:56
@DinoopNair: you can get the *parent* key and set the value on the returned dictionary with the last element. – Martijn Pieters Feb 23 '15 at 10:59
still i couldn't find the solution. – Dinoop Nair Feb 23 '15 at 12:15

python change json data from a key string

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