PyYamlで3つの値を持つリスト読み込みデモ

example.yaml

etc-a:
    flag:  1
    tag:   aaa
    sql:   select hogehoge${_date_}_${_day_}
etc-b:
    flag:  0
    tag:   bbb
    sql:   select fugaguga${_date_}_${_day_}
etc-c:
    flag:  1
    tag:   ccc
    sql:   select nuhanua${_date_}_${_day_}
etc-d:
    flag:  1
    tag:   ddd
    sql:   select huehueあああ${_date_}_${_day_}
etc-e:
    flag:  0
    tag:   eee
    sql:   select honhon${_date_}_${_day_}

pyyaml_demo.py

import yaml

data = yaml.load(open('example.yaml'))
for d in data:
    print d
    print data[d]["flag"]
    print data[d]["tag"]
    print data[d]["sql"].replace("${_date_}","2013").replace("${_day_}","1112")