mo-dots

import json from mo_dots import Data, to_data, from_data # Create a Data object directly d = Data(a=1, b={'c': 2, 'd': [3, 4]}) print(f"Initial Data object: {d}") # Access with dot notation (null-safe) print(f"d.a: {d.a}") print(f"d.b.c: {d.b.c}") print(f"d.b.e: {d.b.e} (returns Null, not KeyError)") # Path assignment d['x.y.z'] = 99 print(f"After path assignment: {d}") # Path accumulation with += d.stats.count += 1 # Initializes to 0 then adds 1 d.stats.items += ['apple'] # Initializes to [] then appends d.stats.items += ['banana'] print(f"After path accumulation: {d}") # Convert an existing dictionary my_dict = {'user': {'name': 'Alice', 'id': 123}} data_from_dict = to_data(my_dict) print(f"Data from dict: {data_from_dict.user.name}") # Serialize to JSON (requires from_data) try: json.dumps(d) # This will raise TypeError without default=from_data except TypeError as e: print(f"Caught expected TypeError during direct JSON serialization: {e}") json_output = json.dumps(d, default=from_data) print(f"JSON output: {json_output}") assert json.loads(json_output) == {'a': 1, 'b': {'c': 2, 'd': [3, 4]}, 'x': {'y': {'z': 99}}, 'stats': {'count': 1, 'items': ['apple', 'banana']}}