title: dictionary with empty key
body: <p>I would like to know if I can create a map in YAML with Empty KEY.</p>
  
  <p>e.g. 
  map{
  somedifficultString: "someEasyString",
  empty key: "none"
  }</p>
  
  <p>basically I would like to display "none" if the input key is "empty string"</p>
  
  <p>Previous research:
  1. YAML documentation does say use something  like ° for empty key?
  <a href="http://www.yaml.org/spec/1.2/spec.html#c-s-implicit-json-key%28c%29" rel="nofollow noreferrer">http://www.yaml.org/spec/1.2/spec.html#c-s-implicit-json-key%28c%29</a> 
   I tried it, did not work
  2. There is a answered question for how to do it for empty value and that is straightforward but not for empty key <a href="https://stackoverflow.com/questions/833927/yaml-dictionary-with-empty-value/836370#836370">YAML: dictionary with empty value</a></p>