Update app.py

app.py

@@ -129,7 +129,7 @@ async def main():
                     # await file.asave(f"/Users/yunshi/Downloads/360Data/Data Center/Working-On Task/演讲与培训/2023ChatGPT/Coding/code_interpreter/output{i}.png") ##working. 
                     # st.image(file.get_image() #! working. 
                     file.show_image()
-                    st.image(file.get_image(), width=500) #! working. 
+                    st.image(file.get_image(), width=500, output_format='png') #! working. 
                 
 
                 # message_placeholder.markdown(full_response + "▌") ## orignal code.