update python

src/dymott.py

@@ -1,5 +1,7 @@
 import usb.core
 import usb.util
+import sys
+import re
 
 dymo_vid = 0x0922       # Dymo vendor ID
 dymo_tt_pid = 0x0018    # Dymo Twin Turbo Product ID
@@ -48,3 +50,27 @@ def get_serial(dev):
     else:
         return rawserial.decode('utf-16-le')
 
+def fix_serial(uri_line):
+    if not uri_line.startswith("direct usb://DYMO/LabelWriter%20Twin%20Turbo?serial="):
+        return uri_line
+
+    # Extract existing serial
+    match = re.search(r'serial=([^\s]+)', uri_line)
+    if not match:
+        return uri_line
+
+    serial = match.group(1)
+
+    # If the serial is all question marks, replace it
+    if set(serial) == {'?'}:
+        # Generate fallback serial using USB bus/device number from URI line
+        # CUPS output looks like:
+        # direct usb://DYMO/... "DYMO LabelWriter Twin Turbo" usb://...
+        # We'll add a stable dummy fallback here
+        dummy_serial = "DYMOFIX-" + str(abs(hash(uri_line)) % 10000)
+        uri_line = uri_line.replace(f"serial={serial}", f"serial={dummy_serial}")
+
+    return uri_line
+
+for line in sys.stdin:
+    sys.stdout.write(fix_serial(line))