test.py

#!/usr/bin/env python2

from jinja2 import Template
from yaml import load

JYAML="""
- name: Minimal
# comment
  tasks:
  - name: "Testando 1 2 3 {{ nome }}"
    ping:
"""

PPY="""
[ { "name": "Minimal"
# comment
  , "tasks": 
    [ { "name": "Testando 1 2 3 %s"%nome
      , "ping": None
      }
    ]
  }
]
"""

env = {"nome":"Teste"}

obj1 = load(Template(JYAML).render(env))
print(obj1)

obj2 = eval(PPY, env)
print(obj2)

print (obj1 == obj2)