v4.3 tag release update. (#2789)

examples/python/CuTeDSL/blackwell/fmha_bwd.py

@@ -49,9 +49,11 @@ import cutlass.utils.blackwell_helpers as sm100_utils
 from cutlass.cute.runtime import from_dlpack
 from cutlass.cute.typing import Int32, Float32, Float8E4M3FN, Float16, BFloat16, Boolean
 
-current_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.join(current_dir, ".."))
-from utils import fmha_helpers as fmha_utils
+if __name__ == "__main__":
+    current_dir = os.path.dirname(os.path.abspath(__file__))
+    sys.path.insert(0, os.path.join(current_dir, ".."))
+
+from helpers import fmha_helpers as fmha_utils
 
 """
 A fused multi-head attention (FMHA) backward pass example for the NVIDIA Blackwell SM100 architecture using CUTE DSL