ultralytics 8.0.182 remove deprecated pkg_resources (#4979)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

ultralytics/engine/exporter.py

@@ -143,6 +143,9 @@ class Exporter:
             _callbacks (list, optional): List of callback functions. Defaults to None.
         """
         self.args = get_cfg(cfg, overrides)
+        if self.args.format.lower() in ('coreml', 'mlmodel'):  # fix attempt for protobuf<3.20.x errors
+            os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'python'  # must run before TensorBoard callback
+
         self.callbacks = _callbacks or callbacks.get_default_callbacks()
         callbacks.add_integration_callbacks(self)
 
@@ -155,7 +158,6 @@ class Exporter:
         if format in ('tensorrt', 'trt'):  # 'engine' aliases
             format = 'engine'
         if format in ('mlmodel', 'mlpackage', 'mlprogram', 'apple', 'ios', 'coreml'):  # 'coreml' aliases
-            os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'python'  # fix attempt for protobuf<3.20.x errors
             format = 'coreml'
         fmts = tuple(export_formats()['Argument'][1:])  # available export formats
         flags = [x == format for x in fmts]