Check out example codes for "YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.". It will help you in understanding the concepts better.

Code Example 1

YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. 
Please read https://msg.pyyaml.org/load for full details.

import yaml

f = open(filaname_path, 'r')   
yaml.load(f, Loader=yaml.FullLoader)

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