Rearranging code: grouping by functionality parameter-processing, write-buffer-preparing, writing.

The goal is a nice splitting into classes and methods, a bit more clean-codish and easy usage as a module.

led-badge-11x44.py

@@ -495,34 +495,6 @@ if __name__ == '__main__':
      (No "rotation" or "smoothing"(?) effect can be expected, though)
     """ % sys.argv[0])
     args = parser.parse_args()
-    if have_pyhidapi:
-        devinfo = pyhidapi.hid_enumerate(0x0416, 0x5020)
-        # dev = pyhidapi.hid_open(0x0416, 0x5020)
-    else:
-        dev = usb.core.find(idVendor=0x0416, idProduct=0x5020)
-
-    if have_pyhidapi:
-        if devinfo:
-            dev = pyhidapi.hid_open_path(devinfo[0].path)
-            print("using [%s %s] int=%d page=%s via pyHIDAPI" % (
-            devinfo[0].manufacturer_string, devinfo[0].product_string, devinfo[0].interface_number, devinfo[0].usage_page))
-        else:
-            print("No led tag with vendorID 0x0416 and productID 0x5020 found.")
-            print("Connect the led tag and run this tool as root.")
-            sys.exit(1)
-    else:
-        if dev is None:
-            print("No led tag with vendorID 0x0416 and productID 0x5020 found.")
-            print("Connect the led tag and run this tool as root.")
-            sys.exit(1)
-        try:
-            # win32: NotImplementedError: is_kernel_driver_active
-            if dev.is_kernel_driver_active(0):
-                dev.detach_kernel_driver(0)
-        except:
-            pass
-        dev.set_configuration()
-        print("using [%s %s] bus=%d dev=%d" % (dev.manufacturer, dev.product, dev.bus, dev.address))
 
     if args.preload:
         for file in args.preload:
@@ -571,11 +543,32 @@ if __name__ == '__main__':
         sys.exit(1)
 
     if have_pyhidapi:
+        devinfo = pyhidapi.hid_enumerate(0x0416, 0x5020)
+        # dev = pyhidapi.hid_open(0x0416, 0x5020)
+        if devinfo:
+            dev = pyhidapi.hid_open_path(devinfo[0].path)
+            print("using [%s %s] int=%d page=%s via pyHIDAPI" % (
+            devinfo[0].manufacturer_string, devinfo[0].product_string, devinfo[0].interface_number, devinfo[0].usage_page))
+        else:
+            print("No led tag with vendorID 0x0416 and productID 0x5020 found.")
+            print("Connect the led tag and run this tool as root.")
+            sys.exit(1)
         pyhidapi.hid_write(dev, buf)
+        pyhidapi.hid_close(dev)
     else:
+        dev = usb.core.find(idVendor=0x0416, idProduct=0x5020)
+        if dev is None:
+            print("No led tag with vendorID 0x0416 and productID 0x5020 found.")
+            print("Connect the led tag and run this tool as root.")
+            sys.exit(1)
+        try:
+            # win32: NotImplementedError: is_kernel_driver_active
+            if dev.is_kernel_driver_active(0):
+                dev.detach_kernel_driver(0)
+        except:
+            pass
+        dev.set_configuration()
+        print("using [%s %s] bus=%d dev=%d" % (dev.manufacturer, dev.product, dev.bus, dev.address))
         for i in range(int(len(buf) / 64)):
             time.sleep(0.1)
             dev.write(1, buf[i * 64:i * 64 + 64])
-
-    if have_pyhidapi:
-        pyhidapi.hid_close(dev)