[New-bugs-announce] [issue35111] Make Custom Object Classes JSON Serializable

[andrew c]

New submission from andrew c <achapkowski at esri.com>:

When creating a custom class that doesn't inherit from the accepted classes, there is no way to serialize it using json.dumps or json.dump.  

I propose that __fromjson__ and __tojson__ that when present will be used by the Python's default encoder.  This issue is widely documented on stackoverflow as a deficiency. 

You basically have a couple of options to solve this:

1. Implement a custom  json.JSONEncoder/json.JSONDecoder
2. Implement a method like to/from json
3. Monkey patch the json library
4. Use a 3rd party library

These are not very good options.  If you can serialize an object using pickle, why not have the ability to serialize objects using json?

Thank you

----------
messages: 328897
nosy: andrewchap
priority: normal
severity: normal
status: open
title: Make Custom Object Classes JSON Serializable
type: enhancement
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35111>
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