Python: how to save a dictionary with objects to JSON • Programmer

Each object’s class to be stored in JSON in a convenient for viewing way must have the __repr__ function, which returns the text representation of the object.

class TestObj:

    def __init__(self, x, y):
        self.__x = x
        self.__y = y

    def __repr__(self):
        return "TestObj({x},{y})".format(x = self.__x, y = self.__y)

class TestObj:

def __init__(self, x, y):

self.__x = x

self.__y = y

def __repr__(self):

return "TestObj({x},{y})".format(x = self.__x, y = self.__y)

The dictionary with objects:

datadict = {"group": {"Object1": TestObj(10,22), "Object2": TestObj(36,74)}}

1	datadict = {"group": {"Object1": TestObj(10,22), "Object2": TestObj(36,74)}}

Saving the dictionary to JSON:

with open("c:/file.json", "w", encoding="utf-8") as file:
    import pprint
    pprint.pprint(datadict, indent=4, stream=file)
    file.close()

with open("c:/file.json", "w", encoding="utf-8") as file:

import pprint

pprint.pprint(datadict, indent=4, stream=file)

file.close()