Track changes to lists and dictionaries in python?

Question

I have a class where the instances of this class needs to track the changes to its attributes.

Example: obj.att = 2 would be something that\'s easily tr

Answer 1

My jsonfile module detects changes of (nested) JSON compatible Python objects. Just subclass JSONFileRoot to adapt change detection for your needs.

>>> import jsonfile
>>> class Notify(jsonfile.JSONFileRoot):
...   def on_change(self):
...     print(f'notify: {self.data}')
... 
>>> test = Notify()
>>> test.data = 1
notify: 1
>>> test.data = [1,2,3]
notify: [1, 2, 3]
>>> test.data[0] = 12
notify: [12, 2, 3]
>>> test.data[1] = {"a":"b"}
notify: [12, {'a': 'b'}, 3]
>>> test.data[1]["a"] = 20
notify: [12, {'a': 20}, 3]

Note that it goes on the proxy class way how e-satis advised, without supporting sets.