Can not read subvalue of subvalue

[GiovanniAffogbolo]

Hello,

I found this tool (shyaml) and i have an issue using the function above :

test.yaml

people:
  Thomas:
    age: 15
    sex: M
  Laura:
    age: 15
    sex: F

Script bash :
echo test.yaml | shyaml get-value people.Thomas.age

Executing this does not work. As if shyaml only read on the two first levels.
Is it me who doesn't understand it properly or is true ? Is there a fix for this ? Thanks in advance.

[jharris-tc]

just found this but you need to run cat test.yaml, and then it does work