Question

I have the following data:

d = "{\"key_1": \" val_1\", \"key_2\": \"val_2\"}{\"key_3\": \" val_3\", \"key_4\": \"val_4\"}"

which I would like to translate to a list of dictionary, e.g.

d_list = [{\"key_1": \" val_1\", \"key_2\": \"val_2\"}, {\"key_3\": \" val_3\", \"key_4\": \"val_4\"}]

1. json.loads(d) gives me error of type: raise ValueError(errmsg(“Extra data”, s, end, len(s)))

Any suggestions?

Answer 1

You can use JSONDecoder and its raw_decode() method to accomplish this. raw_decode() will read a complete JSON object, and return a tuple whose first member is the object, and whose second is the offset into the string where the decoder stopped reading.

Basically, you need to read one object, then store it in an array, then read the next object from the string, and so on until you are at the end of the string. Like this:

import json

def read_json_objects(data):
    decoder = json.JSONDecoder()
    offset = 0

    while offset < len(data):
        item = decoder.raw_decode(data[offset:])

        yield item[0]
        offset += item[1]

d = '{"key_1": " val_1", "key_2": "val_2"}{"key_3": " val_3", "key_4": "val_4"}'

print json.dumps(list(read_json_objects(d)))

Which will output this:

[{"key_1": " val_1", "key_2": "val_2"}, {"key_4": "val_4", "key_3": " val_3"}]