Move to src dir usage (#99)

src/crewai/agents/exceptions.py

@@ -0,0 +1,24 @@
+from langchain_core.exceptions import OutputParserException
+
+
+class TaskRepeatedUsageException(OutputParserException):
+    """Exception raised when a task is used twice in a roll."""
+
+    error: str = "TaskRepeatedUsageException"
+    message: str = "I just used the {tool} tool with input {tool_input}. So I already know the result of that and don't need to use it now.\n"
+
+    def __init__(self, tool: str, tool_input: str, text: str):
+        self.text = text
+        self.tool = tool
+        self.tool_input = tool_input
+        self.message = self.message.format(tool=tool, tool_input=tool_input)
+
+        super().__init__(
+            error=self.error,
+            observation=self.message,
+            send_to_llm=True,
+            llm_output=self.text,
+        )
+
+    def __str__(self):
+        return self.message