For JSON support, consider using the User Settings APIs in PySimpleGUI

[PySimpleGUI]

Have you seen the User Settings APIs that are now part of PySimpleGUI?

They were added a few releases ago and are not a very important part of the SDK.

I use them for many demos now and are also holding the "global settings" for all of PySimpleGUI.

PySimpleGUI is branching out a little by providing access to other libraries that a PySimpleGUI programmer may want to use:

• Settings (User Settings APIs)
• Starting other programs (Exec APIs)
• Personalizing PySimpleGUI (global settings default theme)

You'll find the newer Demo Programs that have settings that use these new User Settings APIs. There is documentation on using them. NOTE - the Cookbook has an old manual way of creating your own settings file using JSON. The purpose of the User Settings APIs was to replace this technique (I'll replace that recipe).

Here is the primary documentation on them:
https://pysimplegui.readthedocs.io/en/latest/?#user-settings-api

In addition to settings windows, they are used for "history" of elements too.

The Demo Browser application is a newer one. Lets look at it:

There is a settings window that uses User Settings:

One of the items in this window is the path to the tree combo box:

It has a history of previously selected items. These items are stored in the same User Settings file as other items in this window.

The point here is that this API is good for a number of uses for programs. You don't have to have a settings window to have a need like this. Any piece of data that you want to store and retrieve later is a good candidate for User Settings.