Update app.py

app.py

@@ -7,6 +7,9 @@ import os
 from huggingface_hub import hf_hub_download
 from diffusers import StableDiffusionXLPipeline, AutoencoderKL, EulerAncestralDiscreteScheduler
 from compel import Compel, ReturnedEmbeddingsType
+from PIL import Image, PngImagePlugin
+import json
+import io
 
 # =====================================
 # Prompt weights