Fix for *.yaml emojis on load (#5543)

Fix for Colab hub error: ```python import yaml with open('yolov5s.yaml', errors='ignore') as f: d = yaml.safe_load(f) # model dict print(d) --------------------------------------------------------------------------- ReaderError Traceback (most recent call last) <ipython-input-8-1150b5143073> in <module>() 2 3 with open('yolov5s.yaml', errors='ignore') as f: ----> 4 d = yaml.safe_load(f) # model dict 5 6 print(d) 6 frames /usr/local/lib/python3.7/dist-packages/yaml/reader.py in check_printable(self, data) 142 position = self.index+(len(self.buffer)-self.pointer)+match.start() 143 raise ReaderError(self.name, position, ord(character), --> 144 'unicode', "special characters are not allowed") 145 146 def update(self, length): ReaderError: unacceptable character #x1f680: special characters are not allowed in "yolov5s.yaml", position 9 ```

Fix for *.yaml emojis on load (#5543)
60c8a4f6 · Glenn Jocher · GitHub · e189fa15 · 60c8a4f6
--- a/models/yolo.py
+++ b/models/yolo.py
@@ -90,7 +90,7 @@ class Model(nn.Module):
        else:  # is *.yaml
            import yaml  # for torch hub
            self.yaml_file = Path(cfg).name
-            with open(cfg, errors='ignore') as f:
+            with open(cfg, encoding='ascii', errors='ignore') as f:
                self.yaml = yaml.safe_load(f)  # model dict

        # Define model