Fix exception causes all over the codebase (#1014)

autogen/agentchat/contrib/math_user_proxy_agent.py

@@ -397,8 +397,8 @@ class WolframAlphaAPIWrapper(BaseModel):
         try:
             import wolframalpha
 
-        except ImportError:
-            raise ImportError("wolframalpha is not installed. " "Please install it with `pip install wolframalpha`")
+        except ImportError as e:
+            raise ImportError("wolframalpha is not installed. Please install it with `pip install wolframalpha`") from e
         client = wolframalpha.Client(wolfram_alpha_appid)
         values["wolfram_client"] = client
 

samples/apps/autogen-studio/autogenstudio/utils/utils.py

@@ -128,7 +128,7 @@ def serialize_file(file_path: str) -> Tuple[str, str]:
             file_content = file.read()
             base64_encoded_content = base64.b64encode(file_content).decode("utf-8")
     except Exception as e:
-        raise IOError(f"An error occurred while reading the file: {e}")
+        raise IOError(f"An error occurred while reading the file: {e}") from e
 
     return base64_encoded_content, file_type