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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: pan-x-c

trinity/utils/dlc_utils.py

@@ -41,9 +41,9 @@ def is_running() -> bool:
     """Check if ray cluster is running."""
     python_dir = os.path.dirname(sys.executable)
     ray_path = os.path.join(python_dir, "ray")
-    if os.path.exists(ray_path) is False:
+    if not os.path.exists(ray_path):
         ray_path = "ray"
-    ret = subprocess.run(f"{ray_path} status", shell=True, capture_output=True)
+    ret = subprocess.run([ray_path, "status"], capture_output=True)
     return ret.returncode == 0