A custom JSON encoder that excludes null or empty pair values.

gistfile1.py

from json import JSONEncoder

class CustomJsonEncoder(JSONEncoder):
     
    def remove_none(self, data):
        if isinstance(data, dict):
            return {k:self.remove_none(v) for k, v in data.items() if k and v }
        elif isinstance(data, list):
            return [self.remove_none(item) for item in data if item]
        elif isinstance(data, set):
                return {self.remove_none(item) for item in data if item}
        else:
            return data
              
    def default(self, obj):
        return self.remove_none(obj.__dict__)
    
    

Usage:

import json
json.dumps(object_to_serialize, sort_keys=True, indent=2, cls=CustomJsonEncoder))