fix bugs in pdf_loader.py and image_loader.py

loader/image_loader.py

@@ -33,6 +33,8 @@ class UnstructuredPaddleImageLoader(UnstructuredFileLoader):
       
       
 if __name__ == "__main__":
+    import sys
+    sys.path.append(os.path.dirname(os.path.dirname(__file__)))
     filepath = os.path.join(os.path.dirname(os.path.dirname(__file__)), "knowledge_base", "samples", "content", "test.jpg")
     loader = UnstructuredPaddleImageLoader(filepath, mode="elements")
     docs = loader.load()

loader/pdf_loader.py

@@ -49,6 +49,8 @@ class UnstructuredPaddlePDFLoader(UnstructuredFileLoader):
 
 
 if __name__ == "__main__":
+    import sys
+    sys.path.append(os.path.dirname(os.path.dirname(__file__)))
     filepath = os.path.join(os.path.dirname(os.path.dirname(__file__)), "knowledge_base", "samples", "content", "test.pdf")
     loader = UnstructuredPaddlePDFLoader(filepath, mode="elements")
     docs = loader.load()