fix: handle invalid data source type

pandasai/dataframe/loader.py

@@ -4,6 +4,7 @@
 from datetime import datetime, timedelta
 import hashlib
 
+from pandasai.exceptions import InvalidDataSourceType
 from pandasai.helpers.path import find_project_root
 from .base import DataFrame
 import importlib
@@ -101,11 +102,8 @@ def _load_from_source(self) -> pd.DataFrame:
                 load_function = getattr(module, f"load_from_{source_type}")
                 return load_function(connection_info, query)
             else:
-                connector_class = getattr(
-                    module, f"{source_type.capitalize()}Connector"
-                )
-                connector = connector_class(config=connection_info)
-                return connector.execute_query(query)
+                raise InvalidDataSourceType("Invalid data source type")
+
         except ImportError as e:
             raise ImportError(
                 f"{source_type.capitalize()} connector not found. "

pandasai/exceptions.py

@@ -250,3 +250,9 @@ class LazyLoadError(Exception):
     """Raised when trying to access data that hasn't been loaded in lazy load mode."""
 
     pass
+
+
+class InvalidDataSourceType(Exception):
+    """Raised error with invalid data source provided"""
+
+    pass