`lapx` package replacement for `lap` (#3383)

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.10']
+        python-version: ['3.11']
         model: [yolov5n]
     steps:
       - uses: actions/checkout@v3
@@ -141,7 +141,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.8', '3.9', '3.10']
+        python-version: ['3.11']
         model: [yolov8n]
         torch: [latest]
         include:

ultralytics/tracker/utils/matching.py

@@ -13,8 +13,7 @@ try:
 except (ImportError, AssertionError, AttributeError):
     from ultralytics.yolo.utils.checks import check_requirements
 
-    check_requirements('cython')  # required before installing lap from source
-    check_requirements('git+https://github.com/gatagat/lap.git')  # more reliable than 'pip install lap'
+    check_requirements('lapx>=0.5.2')  # update to lap package from https://github.com/rathaROG/lapx
     import lap