Python Flask Basics Character Builder Create a JSON String

samson akisanya
samson akisanya
iOS Development Techdegree Student 6,329 Points

Can't get this to work

Create a function named to_json that takes a single argument. Convert the argument to string with the json library and return it.

Bummer: the JSON object must be str, bytes or bytearray, not 'dict'

def to_json(arg): return "{}".format(json.loads(arg))

I even tried

def to_json(arg): return json.loads(args)
import json

def to_json(arg):
    return "{}".format(json.loads(arg))

3 Answers

Øyvind Andreassen
Øyvind Andreassen
16,838 Points

Hi! You want to use json.dumps() on this one, as you can see from the example below. .loads() converts the string into an dict, and dumps turns a dict into a string.

>>> loads = json.loads('{"key" : "value"}')
>>> type(loads)
<class 'dict'>
>>> dump = json.dumps({"key":"value"})
>>> type(dump)
<class 'str'>

So a passing solution would be.

def to_json(arg):
    return json.dumps(arg)