Fix yaml.safe_load() ignore emoji errors (#5060)

train.py

@@ -72,7 +72,7 @@ def train(hyp,  # path/to/hyp.yaml or hyp dictionary
 
     # Hyperparameters
     if isinstance(hyp, str):
-        with open(hyp) as f:
+        with open(hyp, errors='ignore') as f:
             hyp = yaml.safe_load(f)  # load hyps dict
     LOGGER.info(colorstr('hyperparameters: ') + ', '.join(f'{k}={v}' for k, v in hyp.items()))
 
@@ -488,7 +488,7 @@ def main(opt, callbacks=Callbacks()):
     if opt.resume and not check_wandb_resume(opt) and not opt.evolve:  # resume an interrupted run
         ckpt = opt.resume if isinstance(opt.resume, str) else get_latest_run()  # specified or most recent path
         assert os.path.isfile(ckpt), 'ERROR: --resume checkpoint does not exist'
-        with open(Path(ckpt).parent.parent / 'opt.yaml') as f:
+        with open(Path(ckpt).parent.parent / 'opt.yaml', errors='ignore') as f:
             opt = argparse.Namespace(**yaml.safe_load(f))  # replace
         opt.cfg, opt.weights, opt.resume = '', ckpt, True  # reinstate
         LOGGER.info(f'Resuming training from {ckpt}')
@@ -552,7 +552,7 @@ def main(opt, callbacks=Callbacks()):
                 'mixup': (1, 0.0, 1.0),  # image mixup (probability)
                 'copy_paste': (1, 0.0, 1.0)}  # segment copy-paste (probability)
 
-        with open(opt.hyp) as f:
+        with open(opt.hyp, errors='ignore') as f:
             hyp = yaml.safe_load(f)  # load hyps dict
             if 'anchors' not in hyp:  # anchors commented in hyp.yaml
                 hyp['anchors'] = 3