convert OPT from a dict to a class

shared.py

@@ -5,6 +5,15 @@ import io
 import base64
 from PIL import Image, ImageOps
 
+class PA:
+    def __repr__(self):
+        str=f"<{self.__class__.__name__}("
+        for k, v in self.__dict__.items():
+            str += f"{k}={v!r}, "
+        str=str.rstrip(", ") + ")>"
+        return str
+
+
 hostname = socket.gethostname()
 PROD_HOST="pa_web"