Subprocess improvements (#10973)

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

Augments #10944

* Deduplicate curl code

* Avoid eval() to parse integer

---------

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

segment/train.py

@@ -598,8 +598,12 @@ 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:
-            subprocess.run(
-                f'gsutil cp gs://{opt.bucket}/evolve.csv {evolve_csv}'.split())  # download evolve.csv if exists
+            # download evolve.csv if exists
+            subprocess.run([
+                'gsutil',
+                'cp',
+                f'gs://{opt.bucket}/evolve.csv',
+                str(evolve_csv),])
 
         for _ in range(opt.evolve):  # generations to evolve
             if evolve_csv.exists():  # if evolve.csv exists: select best hyps and mutate