variables - Ansible List acces from value var

Question

On Ansible, how to acces to value of dict from value in other var?

Example:

 #Var:
 class_to_traitement: a
 #Declare list:
 students:
   a: 10
   b: 20
 
 debug:
   msg: "{{ students }}.0.{{ class_to_traitement }}"

Result:

"msg: [{u'a': u'10', u'b': u'20' }].0.a

Desired result: "msg: [{u'a': u'10'}]"

Thanks All!

Answer 1

msg: "{{ students[class_to_traitement] }}"