exception added

src/finetuning/exception/__init__.py

@@ -0,0 +1,31 @@
+import sys
+
+
+def error_message_detail(error, error_detail: sys):
+    _, _, exc_tb = error_detail.exc_info()
+
+    file_name = exc_tb.tb_frame.f_code.co_filename
+
+    error_message = "Error occurred python script name [{0}] line number [{1}] error message [{2}]".format(
+        file_name, exc_tb.tb_lineno, str(error)
+    )
+
+    return error_message
+
+
+class CustomException(Exception):
+    def __init__(self, error_message, error_detail):
+        """
+        :param error_message: error message in string format
+        """
+        super().__init__(error_message)
+
+        self.error_message = error_message_detail(
+            error_message, error_detail=error_detail
+        )
+
+    def __str__(self):
+        return self.error_message
+
+
+