feat: Change the typing for the AIConfig (#16)

This commit inlines the `AIConfigData` class into the existing
`AIConfig`.

It also introduces a new type, `ModelConfig` to replace the much looser
dictionary config that was originally in play. This new model contains
specific, typed properties for the model id, temperature, and max
tokens. Additional model-specific attributes can be accessed as well.

ldai/client.py

@@ -16,17 +16,69 @@ class LDMessage:
     content: str
 
 
-@dataclass
-class AIConfigData:
-    model: Optional[dict]
-    prompt: Optional[List[LDMessage]]
+class ModelConfig:
+    """
+    Configuration related to the model.
+    """
+
+    def __init__(self, id: str, temperature: Optional[float] = None,
+                 max_tokens: Optional[int] = None, attributes: dict = {}):
+        """
+        :param id: The ID of the model.
+        :param temperature: Turning parameter for randomness versus determinism. Exact effect will be determined by the model.
+        :param max_tokens: The maximum number of tokens.
+        :param attributes: Additional model-specific attributes.
+        """
+        self._id = id
+        self._temperature = temperature
+        self._max_tokens = max_tokens
+        self._attributes = attributes
+
+    @property
+    def id(self) -> str:
+        """
+        The ID of the model.
+        """
+        return self._id
+
+    @property
+    def temperature(self) -> Optional[float]:
+        """"
+        Turning parameter for randomness versus determinism. Exact effect will be determined by the model.
+        """
+        return self._temperature
+
+    @property
+    def max_tokens(self) -> Optional[int]:
+        """
+        The maximum number of tokens.
+        """
+
+        return self._max_tokens
+
+    def get_attribute(self, key: str) -> Any:
+        """
+        Retrieve model-specific attributes.
+
+        Accessing a named, typed attribute (e.g. id) will result in the call
+        being delegated to the appropriate property.
+        """
+        if key == 'id':
+            return self.id
+        if key == 'temperature':
+            return self.temperature
+        if key == 'maxTokens':
+            return self.max_tokens
+
+        return self._attributes.get(key)
 
 
 class AIConfig:
-    def __init__(self, config: AIConfigData, tracker: LDAIConfigTracker, enabled: bool):
-        self.config = config
+    def __init__(self, tracker: LDAIConfigTracker, enabled: bool, model: Optional[ModelConfig], prompt: Optional[List[LDMessage]]):
         self.tracker = tracker
         self.enabled = enabled
+        self.model = model
+        self.prompt = prompt
 
 
 class LDAIClient:
@@ -71,16 +123,26 @@ def model_config(
                 for entry in variation['prompt']
             ]
 
+        model = None
+        if 'model' in variation:
+            model = ModelConfig(
+                id=variation['model']['modelId'],
+                temperature=variation['model'].get('temperature'),
+                max_tokens=variation['model'].get('maxTokens'),
+                attributes=variation['model'],
+            )
+
         enabled = variation.get('_ldMeta', {}).get('enabled', False)
         return AIConfig(
-            config=AIConfigData(model=variation['model'], prompt=prompt),
             tracker=LDAIConfigTracker(
                 self.client,
                 variation.get('_ldMeta', {}).get('versionKey', ''),
                 key,
                 context,
             ),
             enabled=bool(enabled),
+            model=model,
+            prompt=prompt
         )
 
     def __interpolate_template(self, template: str, variables: Dict[str, Any]) -> str:

ldai/testing/test_model_config.py

@@ -1,9 +1,8 @@
 import pytest
 from ldclient import Config, Context, LDClient
 from ldclient.integrations.test_data import TestData
-from ldclient.testing.builders import *
 
-from ldai.client import AIConfig, AIConfigData, LDAIClient, LDMessage
+from ldai.client import AIConfig, LDAIClient, LDMessage, ModelConfig
 from ldai.tracker import LDAIConfigTracker
 
 
@@ -14,7 +13,7 @@ def td() -> TestData:
         td.flag('model-config')
         .variations(
             {
-                'model': {'modelId': 'fakeModel'},
+                'model': {'modelId': 'fakeModel', 'temperature': 0.5, 'maxTokens': 4096},
                 'prompt': [{'role': 'system', 'content': 'Hello, {{name}}!'}],
                 '_ldMeta': {'enabled': True, 'versionKey': 'abcd'},
             },
@@ -27,7 +26,7 @@ def td() -> TestData:
         td.flag('multiple-prompt')
         .variations(
             {
-                'model': {'modelId': 'fakeModel'},
+                'model': {'modelId': 'fakeModel', 'temperature': 0.7, 'maxTokens': 8192},
                 'prompt': [
                     {'role': 'system', 'content': 'Hello, {{name}}!'},
                     {'role': 'user', 'content': 'The day is, {{day}}!'},
@@ -43,7 +42,7 @@ def td() -> TestData:
         td.flag('ctx-interpolation')
         .variations(
             {
-                'model': {'modelId': 'fakeModel'},
+                'model': {'modelId': 'fakeModel', 'extra-attribute': 'I can be anything I set my mind/type to'},
                 'prompt': [{'role': 'system', 'content': 'Hello, {{ldctx.name}}!'}],
                 '_ldMeta': {'enabled': True, 'versionKey': 'abcd'},
             }
@@ -55,7 +54,7 @@ def td() -> TestData:
         td.flag('off-config')
         .variations(
             {
-                'model': {'modelId': 'fakeModel'},
+                'model': {'modelId': 'fakeModel', 'temperature': 0.1},
                 'prompt': [{'role': 'system', 'content': 'Hello, {{name}}!'}],
                 '_ldMeta': {'enabled': False, 'versionKey': 'abcd'},
             }
@@ -82,81 +81,110 @@ def ldai_client(client: LDClient) -> LDAIClient:
     return LDAIClient(client)
 
 
+def test_model_config_delegates_to_properties():
+    model = ModelConfig('fakeModel', temperature=0.5, max_tokens=4096, attributes={'extra-attribute': 'value'})
+    assert model.id == 'fakeModel'
+    assert model.temperature == 0.5
+    assert model.max_tokens == 4096
+    assert model.get_attribute('extra-attribute') == 'value'
+    assert model.get_attribute('non-existent') is None
+
+    assert model.id == model.get_attribute('id')
+    assert model.temperature == model.get_attribute('temperature')
+    assert model.max_tokens == model.get_attribute('maxTokens')
+    assert model.max_tokens != model.get_attribute('max_tokens')
+
+
 def test_model_config_interpolation(ldai_client: LDAIClient, tracker):
     context = Context.create('user-key')
     default_value = AIConfig(
-        config=AIConfigData(
-            model={'modelId': 'fakeModel'},
-            prompt=[LDMessage(role='system', content='Hello, {{name}}!')],
-        ),
         tracker=tracker,
         enabled=True,
+        model=ModelConfig('fakeModel'),
+        prompt=[LDMessage(role='system', content='Hello, {{name}}!')],
     )
     variables = {'name': 'World'}
 
     config = ldai_client.model_config('model-config', context, default_value, variables)
 
-    assert config.config.prompt is not None
-    assert len(config.config.prompt) > 0
-    assert config.config.prompt[0].content == 'Hello, World!'
+    assert config.prompt is not None
+    assert len(config.prompt) > 0
+    assert config.prompt[0].content == 'Hello, World!'
     assert config.enabled is True
 
+    assert config.model is not None
+    assert config.model.id == 'fakeModel'
+    assert config.model.temperature == 0.5
+    assert config.model.max_tokens == 4096
+
 
 def test_model_config_no_variables(ldai_client: LDAIClient, tracker):
     context = Context.create('user-key')
-    default_value = AIConfig(
-        config=AIConfigData(model={}, prompt=[]), tracker=tracker, enabled=True
-    )
+    default_value = AIConfig(tracker=tracker, enabled=True, model=ModelConfig('fake-model'), prompt=[])
 
     config = ldai_client.model_config('model-config', context, default_value, {})
 
-    assert config.config.prompt is not None
-    assert len(config.config.prompt) > 0
-    assert config.config.prompt[0].content == 'Hello, !'
+    assert config.prompt is not None
+    assert len(config.prompt) > 0
+    assert config.prompt[0].content == 'Hello, !'
     assert config.enabled is True
 
+    assert config.model is not None
+    assert config.model.id == 'fakeModel'
+    assert config.model.temperature == 0.5
+    assert config.model.max_tokens == 4096
+
 
 def test_context_interpolation(ldai_client: LDAIClient, tracker):
     context = Context.builder('user-key').name("Sandy").build()
-    default_value = AIConfig(
-        config=AIConfigData(model={}, prompt=[]), tracker=tracker, enabled=True
-    )
+    default_value = AIConfig(tracker=tracker, enabled=True, model=ModelConfig('fake-model'), prompt=[])
     variables = {'name': 'World'}
 
     config = ldai_client.model_config(
         'ctx-interpolation', context, default_value, variables
     )
 
-    assert config.config.prompt is not None
-    assert len(config.config.prompt) > 0
-    assert config.config.prompt[0].content == 'Hello, Sandy!'
+    assert config.prompt is not None
+    assert len(config.prompt) > 0
+    assert config.prompt[0].content == 'Hello, Sandy!'
     assert config.enabled is True
 
+    assert config.model is not None
+    assert config.model.id == 'fakeModel'
+    assert config.model.temperature is None
+    assert config.model.max_tokens is None
+    assert config.model.get_attribute('extra-attribute') == 'I can be anything I set my mind/type to'
+
 
 def test_model_config_multiple(ldai_client: LDAIClient, tracker):
     context = Context.create('user-key')
-    default_value = AIConfig(
-        config=AIConfigData(model={}, prompt=[]), tracker=tracker, enabled=True
-    )
+    default_value = AIConfig(tracker=tracker, enabled=True, model=ModelConfig('fake-model'), prompt=[])
     variables = {'name': 'World', 'day': 'Monday'}
 
     config = ldai_client.model_config(
         'multiple-prompt', context, default_value, variables
     )
 
-    assert config.config.prompt is not None
-    assert len(config.config.prompt) > 0
-    assert config.config.prompt[0].content == 'Hello, World!'
-    assert config.config.prompt[1].content == 'The day is, Monday!'
+    assert config.prompt is not None
+    assert len(config.prompt) > 0
+    assert config.prompt[0].content == 'Hello, World!'
+    assert config.prompt[1].content == 'The day is, Monday!'
     assert config.enabled is True
 
+    assert config.model is not None
+    assert config.model.id == 'fakeModel'
+    assert config.model.temperature == 0.7
+    assert config.model.max_tokens == 8192
+
 
 def test_model_config_disabled(ldai_client: LDAIClient, tracker):
     context = Context.create('user-key')
-    default_value = AIConfig(
-        config=AIConfigData(model={}, prompt=[]), tracker=tracker, enabled=False
-    )
+    default_value = AIConfig(tracker=tracker, enabled=False, model=ModelConfig('fake-model'), prompt=[])
 
     config = ldai_client.model_config('off-config', context, default_value, {})
 
+    assert config.model is not None
     assert config.enabled is False
+    assert config.model.id == 'fakeModel'
+    assert config.model.temperature == 0.1
+    assert config.model.max_tokens is None