Update app.py

app.py

@@ -46,14 +46,16 @@ if "directory_path" not in st.session_state:
     st.session_state.directory_path = generate_random_string(20)
 
 with st.sidebar:
-    st.subheader("Upload your Documents Here: ")            
+    st.subheader("Upload your Documents Here: ") 
+    pdf_files = st.file_uploader("Choose your PDF Files and Press OK", type=['pdf'], accept_multiple_files=True)
     if "pdf_files" not in st.session_state:
-        st.session_state.pdf_files = st.file_uploader("Choose your PDF Files and Press OK", type=['pdf'], accept_multiple_files=True)   
+        #st.session_state.pdf_files = st.file_uploader("Choose your PDF Files and Press OK", type=['pdf'], accept_multiple_files=True)   
+        st.session_state.pdf_files = pdf_files
         if not st.session_state.pdf_files:   #如果没有上传文件，则程序停止执行，就不会出现documents为空的错误情况、
             st.warning("请上传文档文件")
             st.stop()      
         else:   #如果已经上传文件，则装载文件SimpleDirectoryReader.load_data()
-            st.session_state.pdf_files=pdf_files
+            #st.session_state.pdf_files=pdf_files
             if not os.path.exists(st.session_state.directory_path):
                 os.makedirs(st.session_state.directory_path)
                 for pdf_file in st.session_state.pdf_files: