yaml中的重写变量

我有一个如下所示的yml配置文件：

default: &default
  aws_access_key: <%= ENV['AWS_ACCESS_KEY'] %>
  aws_secret_key: <%= ENV['AWS_SECRET_KEY'] %>
  region: <%= ENV['AWS_REGION'] %>
  aws_s3_bucket: <%= ENV['AWS_S3_BUCKET'] %>
  aws_s3_host: "https://s3-eu-west-1.amazonaws.com/"

development:
  <<: *default

default:&default
aws\u访问\u密钥：
aws_密钥：
地区：
aws_s3_铲斗：
aws_s3_主机：https://s3-eu-west-1.amazonaws.com/"
发展：
如果您可以使用python，这非常简单：

import yaml

# read your first file
with open("basefile.yaml", 'r') as f:
    conf = yaml.load(f)

# read your second file
with open("devfile.yaml", 'r') as f:
    devconf = yaml.load(f)

# update the first dictionnary with the values of the second
conf.update(devconf)

# write it in a new file
with open("result.yaml", 'w+') as f:
    yaml.dump(conf, f)