Is there a way to append to a json object in a file? -

i using file hold json data program generating. structure this:

{"alldata" : {     "data1": [{"d": 10}, {"d": 20}, {"d": 30}],     "data2": [{"d": 100}, {"d": 200}, {"d": 300}],     "data3": [{"d": 1000}, {"d": 2000}, {"d": 3000}]     } } 

i generating , writing data constantly. need read data file use in program.

the problem whenever want add new data 1 of data members of alldata object program have read in whole object file , store json object in memory, access data member, append new piece of data, , write whole object file.

i able add data file more efficiently bypassing bringing whole object memory. think better open file appending , add piece of data it. however, don't think work because appending end of file screw format of json.

my initial thought create 3 separate json files, data1.json, data2.json, , data3.json objects in them, this:

data1.json {"d": 10} {"d": 20} {"d": 30} 

and few times need read data use in program, open files , reconstruct original json object.

is there way append json object in file? preferred way of adding json object in file? there file format other json allow type of behavior?