Fix loading yaml (#5619)

* fix yaml

* chlog

CHANGELOG.md

@@ -119,6 +119,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed `num_workers` for Windows example ([#5375](https://github.com/PyTorchLightning/pytorch-lightning/pull/5375))
 
 
+- Fixed loading yaml ([#5619](https://github.com/PyTorchLightning/pytorch-lightning/pull/5619))
+
 ## [1.1.3rc] - 2020-12-29
 
 ### Added

pytorch_lightning/core/saving.py

@@ -339,7 +339,7 @@ def load_hparams_from_yaml(config_yaml: str) -> Dict[str, Any]:
         return {}
 
     with fs.open(config_yaml, "r") as fp:
-        tags = yaml.full_load(fp)
+        tags = yaml.load(fp, Loader=yaml.UnsafeLoader)
 
     return tags
 

requirements.txt

@@ -4,7 +4,7 @@ numpy>=1.16.6
 torch>=1.4
 future>=0.17.1  # required for builtins in setup.py
 # pyyaml>=3.13
-PyYAML>=5.1, !=5.4.*  # OmegaConf requirement >=5.1
+PyYAML>=5.1  # OmegaConf requirement >=5.1
 tqdm>=4.41.0
 fsspec[http]>=0.8.1
 tensorboard>=2.2.0