Use contextlib's suppress method to silence an error (#8668)

models/yolo.py

@@ -7,6 +7,7 @@
 """
 
 import argparse
+import contextlib
 import os
 import platform
 import sys
@@ -259,10 +260,8 @@ def parse_model(d, ch):  # model_dict, input_channels(3)
     for i, (f, n, m, args) in enumerate(d['backbone'] + d['head']):  # from, number, module, args
         m = eval(m) if isinstance(m, str) else m  # eval strings
         for j, a in enumerate(args):
-            try:
+            with contextlib.suppress(NameError):
                 args[j] = eval(a) if isinstance(a, str) else a  # eval strings
-            except NameError:
-                pass
 
         n = n_ = max(round(n * gd), 1) if n > 1 else n  # depth gain
         if m in (Conv, GhostConv, Bottleneck, GhostBottleneck, SPP, SPPF, DWConv, MixConv2d, Focus, CrossConv,