added multidevice support

python_app/hardware_full/librevna_driver/__init__.py

@@ -2,7 +2,6 @@
 
 import logging
 
-from .device import LibreVNADevice
 from .enums import (
     HardwareFamily,
     PacketType,
@@ -71,4 +70,14 @@ __all__ = [
     "VNASweepSettings",
 ]
 
+
+def __getattr__(name: str):
+    """Load USB-backed device class only when native hardware access is requested."""
+    if name == "LibreVNADevice":
+        from .device import LibreVNADevice
+
+        return LibreVNADevice
+    raise AttributeError(name)
+
+
 logging.getLogger(__name__).addHandler(logging.NullHandler())