Update app.py

app.py

@@ -8,6 +8,8 @@ from glide_text2im.model_creation import (
     model_and_diffusion_defaults,
     model_and_diffusion_defaults_upsampler
 )
+has_cuda = th.cuda.is_available()
+device = th.device('cpu' if not has_cuda else 'cuda')
 # Create base model.
 options = model_and_diffusion_defaults()
 options['use_fp16'] = has_cuda