From fa5d7a2e05c8f35605a07f6c2895b4305ed42cb0 Mon Sep 17 00:00:00 2001
From: Lorenze Jay <lorenzejaytech@gmail.com>
Date: Wed, 12 Feb 2025 16:23:05 -0800
Subject: [PATCH] Add default model for CrewEvaluator and fix event import
 order

- Set default model to "gpt-4o-mini" in CrewEvaluator when no model is specified
- Reorder event-related imports in task.py to follow standard import conventions
- Update event bus initialization method return type hint
- Export event_bus in events/__init__.py
---
 src/crewai/crew.py                       | 2 +-
 src/crewai/task.py                       | 2 +-
 src/crewai/utilities/events/__init__.py  | 2 +-
 src/crewai/utilities/events/event_bus.py | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/crewai/crew.py b/src/crewai/crew.py
index 20b2b76df..4bf7c3127 100644
--- a/src/crewai/crew.py
+++ b/src/crewai/crew.py
@@ -1209,7 +1209,7 @@ class Crew(BaseModel):
                 ),
             )
             test_crew = self.copy()
-            evaluator = CrewEvaluator(test_crew, openai_model_name)
+            evaluator = CrewEvaluator(test_crew, openai_model_name or "gpt-4o-mini")
 
             for i in range(1, n_iterations + 1):
                 evaluator.set_iteration(i)
diff --git a/src/crewai/task.py b/src/crewai/task.py
index bbc7b2ace..4a3af6dbb 100644
--- a/src/crewai/task.py
+++ b/src/crewai/task.py
@@ -40,12 +40,12 @@ from crewai.telemetry.telemetry import Telemetry
 from crewai.tools.base_tool import BaseTool
 from crewai.utilities.config import process_config
 from crewai.utilities.converter import Converter, convert_to_model
-from crewai.utilities.events.event_bus import event_bus
 from crewai.utilities.events import (
     TaskCompletedEvent,
     TaskFailedEvent,
     TaskStartedEvent,
 )
+from crewai.utilities.events.event_bus import event_bus
 from crewai.utilities.i18n import I18N
 from crewai.utilities.printer import Printer
 
diff --git a/src/crewai/utilities/events/__init__.py b/src/crewai/utilities/events/__init__.py
index 5055930db..d326b8fd6 100644
--- a/src/crewai/utilities/events/__init__.py
+++ b/src/crewai/utilities/events/__init__.py
@@ -15,7 +15,7 @@ from .flow_events import (
     MethodExecutionStartedEvent,
     MethodExecutionFinishedEvent,
 )
-from .event_bus import EventTypes, EventBus
+from .event_bus import EventTypes, EventBus, event_bus
 from .tool_usage_events import ToolUsageFinishedEvent, ToolUsageErrorEvent
 
 # events
diff --git a/src/crewai/utilities/events/event_bus.py b/src/crewai/utilities/events/event_bus.py
index 29387a268..067aadbb0 100644
--- a/src/crewai/utilities/events/event_bus.py
+++ b/src/crewai/utilities/events/event_bus.py
@@ -28,7 +28,7 @@ class EventBus:
                     cls._instance._initialize()
         return cls._instance
 
-    def _initialize(self):
+    def _initialize(self) -> None:
         """Initialize the event bus internal state"""
         self._signal = Signal("event_bus")
         self._handlers: Dict[