Fix TensorRT potential unordered binding addresses (ultralytics#5826)

* feat: change file suffix in pythonic way

* fix: enforce binding addresses order

* fix: enforce binding addresses order

export.py

@@ -276,7 +276,7 @@ def export_engine(model, im, file, train, half, simplify, workspace=4, verbose=F
         assert onnx.exists(), f'failed to export ONNX file: {onnx}'
 
         LOGGER.info(f'\n{prefix} starting export with TensorRT {trt.__version__}...')
-        f = str(file).replace('.pt', '.engine')  # TensorRT engine file
+        f = file.with_suffix('.engine')  # TensorRT engine file
         logger = trt.Logger(trt.Logger.INFO)
         if verbose:
             logger.min_severity = trt.Logger.Severity.VERBOSE
@@ -310,6 +310,7 @@ def export_engine(model, im, file, train, half, simplify, workspace=4, verbose=F
     except Exception as e:
         LOGGER.info(f'\n{prefix} export failure: {e}')
 
+
 @torch.no_grad()
 def run(data=ROOT / 'data/coco128.yaml',  # 'dataset.yaml path'
         weights=ROOT / 'yolov5s.pt',  # weights path

models/common.py

@@ -7,7 +7,7 @@
 import math
 import platform
 import warnings
-from collections import namedtuple
+from collections import OrderedDict, namedtuple
 from copy import copy
 from pathlib import Path
 
@@ -326,14 +326,14 @@ def __init__(self, weights='yolov5s.pt', device=None, dnn=True):
             logger = trt.Logger(trt.Logger.INFO)
             with open(w, 'rb') as f, trt.Runtime(logger) as runtime:
                 model = runtime.deserialize_cuda_engine(f.read())
-            bindings = dict()
+            bindings = OrderedDict()
             for index in range(model.num_bindings):
                 name = model.get_binding_name(index)
                 dtype = trt.nptype(model.get_binding_dtype(index))
                 shape = tuple(model.get_binding_shape(index))
                 data = torch.from_numpy(np.empty(shape, dtype=np.dtype(dtype))).to(device)
                 bindings[name] = Binding(name, dtype, shape, data, int(data.data_ptr()))
-            binding_addrs = {n: d.ptr for n, d in bindings.items()}
+            binding_addrs = OrderedDict((n, d.ptr) for n, d in bindings.items())
             context = model.create_execution_context()
             batch_size = bindings['images'].shape[0]
         else:  # TensorFlow model (TFLite, pb, saved_model)