Security3 (#10944)

* Security improvements

* Security improvements

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

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

train.py

@@ -19,6 +19,7 @@ import argparse
 import math
 import os
 import random
+import subprocess
 import sys
 import time
 from copy import deepcopy
@@ -571,7 +572,8 @@ def main(opt, callbacks=Callbacks()):
         # ei = [isinstance(x, (int, float)) for x in hyp.values()]  # evolvable indices
         evolve_yaml, evolve_csv = save_dir / 'hyp_evolve.yaml', save_dir / 'evolve.csv'
         if opt.bucket:
-            os.system(f'gsutil cp gs://{opt.bucket}/evolve.csv {evolve_csv}')  # download evolve.csv if exists
+            subprocess.run(
+                f'gsutil cp gs://{opt.bucket}/evolve.csv {evolve_csv}'.split())  # download evolve.csv if exists
 
         for _ in range(opt.evolve):  # generations to evolve
             if evolve_csv.exists():  # if evolve.csv exists: select best hyps and mutate