yaml2yaml2.py

from cStringIO import StringIO
import sys

import ruamel.ordereddict
import ruamel.yaml


s = '''\
foo:
    bar: baz
    a: 1
    # comment
    c: |-
        qwertyuiop
        asdfghjkl
        zxcvbnm
'''

yaml = ruamel.yaml.YAML()
yaml.version = 1,1
yaml.indent(sequence=4, offset=2)
yaml.sort_base_mapping_type_on_output = True

data = yaml.load(StringIO(s))
data['foo'] = dict(data['foo'])
yaml.dump(data, sys.stdout)