change mixlayer to be single layer

Code/main.py

@@ -103,7 +103,7 @@ if __name__ == "__main__":
 	parser.add_argument(
 		"--mixlayer",
 		help="specify the layer to mix. Only select one layer at a time",
-		type=list
+		type=int
 	)
 
 	#Datasets