updates

train.py

@@ -407,7 +407,7 @@ def prebias():
     parser.add_argument('--bucket', type=str, default='', help='gsutil bucket')
     parser.add_argument('--img-weights', action='store_true', help='select training images by weight')
     parser.add_argument('--cache-images', action='store_true', help='cache images for faster training')
-    parser.add_argument('--weights', type=str, default='', help='initial weights')  # i.e. weights/darknet.53.conv.74
+    parser.add_argument('--weights', type=str, default='weights/yolov3-spp.weights', help='initial weights')  # i.e. weights/darknet.53.conv.74
     parser.add_argument('--arc', type=str, default='default', help='yolo architecture')  # defaultpw, uCE, uBCE
     parser.add_argument('--prebias', action='store_true', help='transfer-learn yolo biases prior to training')
     parser.add_argument('--name', default='', help='renames results.txt to results_name.txt if supplied')