update `detect.py` in order to support torch script (#5109)

* update detect.py in order to support torch script This change assumes the torchscrip file was previously saved with `export.py` * update `detect.py` for torchscript support Simple update for torchscript support. Assumes the torchscript file has been generated with `export.py` * Cleanup Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

update `detect.py` in order to support torch script (#5109)
938efe5d · Andrei Ionut Damian · GitHub · 0bf24cf6 · 938efe5d
--- a/detect.py
+++ b/detect.py
@@ -79,7 +79,7 @@ def run(weights=ROOT / 'yolov5s.pt',  # model.pt path(s)
    pt, onnx, tflite, pb, saved_model = (suffix == x for x in suffixes)  # backend booleans
    stride, names = 64, [f'class{i}' for i in range(1000)]  # assign defaults
    if pt:
-        model = attempt_load(weights, map_location=device)  # load FP32 model
+        model = torch.jit.load(w) if 'torchscript' in w else attempt_load(weights, map_location=device)
        stride = int(model.stride.max())  # model stride
        names = model.module.names if hasattr(model, 'module') else model.names  # get class names
        if half: