Update error handling

app.py

@@ -13,19 +13,22 @@ retriever = Retrieval(model_name=embedding_model_name)
 
 llm_model_name = "gpt-4o-mini"
 # Settting up LLMGenerator
-llm_generator = LLMGeneration(llm_model_name=llm_model_name)
+llm_generator = None
 
-def set_api_key(api_key):
-    os.environ['OPENAI_API_KEY'] = api_key
+def set_api_key(api_key: str):
+    if api_key.strip():
+        os.environ['OPENAI_API_KEY'] = api_key
+    else:
+        raise gr.Error("Please provide a valid API key")
 
 def process_inputs(api_key:str, pdf_file, questions: str):
 
     # Setup Api KEY
     set_api_key(api_key)
+    
 
     if pdf_file is None:
-        raise Exception("Blaf")
-    
+        raise gr.Error("Please upload a pdf file")
     
     # Parsing the pdf
     doc_handler = DocParsing(file_path=pdf_file.name,model_name=embedding_model_name)
@@ -34,7 +37,11 @@ def process_inputs(api_key:str, pdf_file, questions: str):
     # Create vector store
     retriever.create_vector_store(chunks=docs)
 
+    # LLM Generator
+    llm_generator = LLMGeneration(llm_model_name=llm_model_name)
 
+    if not questions.strip():
+        raise gr.Error("Please provide valid set of questions")
     output_dict = {}
     questions_list = questions.strip().split('\n')
     for question in questions_list: