Subprocess improvements (#10973)

* Use list-form arguments for subprocess.run calls where possible

Augments #10944

* Deduplicate curl code

* Avoid eval() to parse integer

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Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

segment/val.py

@@ -462,7 +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
-            subprocess.run('zip -r study.zip study_*.txt'.split())
+            subprocess.run(['zip', '-r', 'study.zip', 'study_*.txt'])
             plot_val_study(x=x)  # plot
         else:
             raise NotImplementedError(f'--task {opt.task} not in ("train", "val", "test", "speed", "study")')