Security3 (#10944)

* Security improvements

* Security improvements

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

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

---------

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

segment/val.py

@@ -23,6 +23,7 @@ Usage - formats:
 import argparse
 import json
 import os
+import subprocess
 import sys
 from multiprocessing.pool import ThreadPool
 from pathlib import Path
@@ -461,7 +462,7 @@ def main(opt):
                     r, _, t = run(**vars(opt), plots=False)
                     y.append(r + t)  # results and times
                 np.savetxt(f, y, fmt='%10.4g')  # save
-            os.system('zip -r study.zip study_*.txt')
+            subprocess.run('zip -r study.zip study_*.txt'.split())
             plot_val_study(x=x)  # plot
         else:
             raise NotImplementedError(f'--task {opt.task} not in ("train", "val", "test", "speed", "study")')