Clean up code for review

src/crewai/agent.py

@@ -1,5 +1,5 @@
 import os
-from copy import copy
+from copy import copy as shallow_copy
 from typing import Any, List, Optional, Tuple
 
 from langchain.agents.agent import RunnableAgent
@@ -76,10 +76,6 @@ class Agent(BaseAgent):
     response_template: Optional[str] = Field(
         default=None, description="Response format for the agent."
     )
-
-    allow_code_execution: Optional[bool] = Field(
-        default=False, description="Enable code execution for the agent."
-    )
     allow_code_execution: Optional[bool] = Field(
         default=False, description="Enable code execution for the agent."
     )
@@ -286,8 +282,8 @@ class Agent(BaseAgent):
             "llm",
         }
 
-        # TODO: TEST REMOVING THIS AND SEE IF ANYTHING CHANGES
-        existing_llm = copy(self.llm)
+        # Copy llm and clear callbacks
+        existing_llm = shallow_copy(self.llm)
         existing_llm.callbacks = []
         copied_data = self.model_dump(exclude=exclude)
         copied_data = {k: v for k, v in copied_data.items() if v is not None}

src/crewai/crew.py

@@ -5,15 +5,15 @@ from typing import Any, Dict, List, Optional, Union
 
 from langchain_core.callbacks import BaseCallbackHandler
 from pydantic import (
-  UUID4,
-  BaseModel,
-  ConfigDict,
-  Field,
-  InstanceOf,
-  Json,
-  PrivateAttr,
-  field_validator,
-  model_validator,
+    UUID4,
+    BaseModel,
+    ConfigDict,
+    Field,
+    InstanceOf,
+    Json,
+    PrivateAttr,
+    field_validator,
+    model_validator,
 )
 from pydantic_core import PydanticCustomError
 
@@ -69,7 +69,7 @@ class Crew(BaseModel):
     _train: Optional[bool] = PrivateAttr(default=False)
     _train_iteration: Optional[int] = PrivateAttr()
 
-    cache: bool = Field(default=False)
+    cache: bool = Field(default=True)
     model_config = ConfigDict(arbitrary_types_allowed=True)
     tasks: List[Task] = Field(default_factory=list)
     agents: List[BaseAgent] = Field(default_factory=list)
@@ -294,16 +294,13 @@ class Crew(BaseModel):
             # type: ignore[attr-defined] # Argument 1 to "_interpolate_inputs" of "Crew" has incompatible type "dict[str, Any] | None"; expected "dict[str, Any]"
             agent.crew = self  # type: ignore[attr-defined]
             # TODO: Create an AgentFunctionCalling protocol for future refactoring
-            if (
-                hasattr(agent, "function_calling_llm")
-                and not agent.function_calling_llm
-            ):
+            if not agent.function_calling_llm:
                 agent.function_calling_llm = self.function_calling_llm
 
-            if hasattr(agent, "allow_code_execution") and agent.allow_code_execution:
+            if agent.allow_code_execution:
                 agent.tools += agent.get_code_execution_tools()
 
-            if hasattr(agent, "step_callback") and not agent.step_callback:
+            if not agent.step_callback:
                 agent.step_callback = self.step_callback
 
             agent.create_agent_executor()
@@ -321,9 +318,7 @@ class Crew(BaseModel):
             raise NotImplementedError(
                 f"The process '{self.process}' is not implemented yet."
             )
-        metrics = metrics + [
-            agent._token_process.get_summary() for agent in self.agents
-        ]
+        metrics += [agent._token_process.get_summary() for agent in self.agents]
 
         self.usage_metrics = {
             key: sum([m[key] for m in metrics if m is not None]) for key in metrics[0]
@@ -404,7 +399,6 @@ class Crew(BaseModel):
                 ]
                 if len(self.agents) > 1 and len(agents_for_delegation) > 0:
                     task.tools += task.agent.get_delegation_tools(agents_for_delegation)
-                    task.tools += task.agent.get_delegation_tools(agents_for_delegation)
 
             role = task.agent.role if task.agent is not None else "None"
             self._logger.log("debug", f"== Working Agent: {role}", color="bold_purple")
@@ -479,12 +473,9 @@ class Crew(BaseModel):
         self._finish_execution(task_output)
 
         # type: ignore # Incompatible return value type (got "tuple[str, Any]", expected "str")
-        token_usage = self._calculate_usage_metrics()
+        token_usage = self.calculate_usage_metrics()
 
-        return (
-            self._format_output(task_output, token_usage),
-            token_usage,
-        )
+        return self._format_output(task_output, token_usage), token_usage
 
     def copy(self):
         """Create a deep copy of the Crew."""
@@ -558,9 +549,8 @@ class Crew(BaseModel):
             self._rpm_controller.stop_rpm_counter()
         self._telemetry.end_crew(self, output)
 
-    def _calculate_usage_metrics(
-        self,
-    ) -> Dict[str, int]:
+    def calculate_usage_metrics(self) -> Dict[str, int]:
+        """Calculates and returns the usage metrics."""
         total_usage_metrics = {
             "total_tokens": 0,
             "prompt_tokens": 0,
@@ -571,17 +561,13 @@ class Crew(BaseModel):
         for agent in self.agents:
             if hasattr(agent, "_token_process"):
                 token_sum = agent._token_process.get_summary()
-                total_usage_metrics = {
-                    key: total_usage_metrics[key] + token_sum[key]
-                    for key in total_usage_metrics
-                }
+                for key in total_usage_metrics:
+                    total_usage_metrics[key] += token_sum.get(key, 0)
 
-        if self.manager_agent:
+        if self.manager_agent and hasattr(self.manager_agent, "_token_process"):
             token_sum = self.manager_agent._token_process.get_summary()
-            total_usage_metrics = {
-                key: total_usage_metrics[key] + token_sum[key]
-                for key in total_usage_metrics
-            }
+            for key in total_usage_metrics:
+                total_usage_metrics[key] += token_sum.get(key, 0)
 
         return total_usage_metrics