WIP. Converting usage metrics from a dict to an object

src/crewai/types/usage_metrics.py

@@ -0,0 +1,36 @@
+from pydantic import BaseModel, Field
+
+
+class UsageMetrics(BaseModel):
+    """
+    Model to track usage metrics for the crew's execution.
+
+    Attributes:
+        total_tokens: Total number of tokens used.
+        prompt_tokens: Number of tokens used in prompts.
+        completion_tokens: Number of tokens used in completions.
+        successful_requests: Number of successful requests made.
+    """
+
+    total_tokens: int = Field(default=0, description="Total number of tokens used.")
+    prompt_tokens: int = Field(
+        default=0, description="Number of tokens used in prompts."
+    )
+    completion_tokens: int = Field(
+        default=0, description="Number of tokens used in completions."
+    )
+    successful_requests: int = Field(
+        default=0, description="Number of successful requests made."
+    )
+
+    def add_usage_metrics(self, usage_metrics: "UsageMetrics"):
+        """
+        Add the usage metrics from another UsageMetrics object.
+
+        Args:
+            usage_metrics (UsageMetrics): The usage metrics to add.
+        """
+        self.total_tokens += usage_metrics.total_tokens
+        self.prompt_tokens += usage_metrics.prompt_tokens
+        self.completion_tokens += usage_metrics.completion_tokens
+        self.successful_requests += usage_metrics.successful_requests