用配置文件里面的参数值替换yaml模板中的变量值【python】

#!/usr/bin/python
#coding:utf-8
"""
"""
import sys,os
from contextlib import nested

profileList = {};


def PropValue(envfile):
    with open(envfile) as profile:
        new_profile = profile.readlines();
        for line in new_profile:
            line_key = line.strip().split("=",1)[0];
            profileList[line_key] = line.strip().split("=",1)[1];
    
def EnvReplaceYaml(yamlfile,newyamlfile):   
    try:
        with nested(open(yamlfile), open(newyamlfile, 'w')) as (yml_file, yml_output) :
            yml_file_lines = yml_file.readlines();
            for line in yml_file_lines:
                new_line = line;
                if (new_line.find('$$PLACEHOLDER$$') > 0) : 
                    env_list = new_line.split(':');
                    env_name = env_list[0].strip();
                    replacement = "";
                    if env_name in profileList.keys() :
                        replacement = profileList[env_name];
                    new_line = new_line.replace('$$PLACEHOLDER$$', replacement);
                yml_output.write(new_line);


    except IOError, e:
        print ("Error: " + format(str(e)));
        raise;
    

if  __name__ == "__main__" :
    PropValue('env');
    EnvReplaceYaml('temp.yaml','newtemap.yaml');
    

 temp.yaml

---
applications:
- name: $$NAME$$-$$DATETIME$$-$$VERSION$$
  memory: 2048m
  instances: 1
  disk_quota: 2048m
################## ==================================================
  env:
     APP_ID: "$$PLACEHOLDER$$"
     TABLE_KEY: "$$PLACEHOLDER$$"
     SECURITY: "$$PLACEHOLDER$$"
     KEY: "$$PLACEHOLDER$$"

env

     APP_ID=11111111111
     TABLE_KEY=22222222222
     SECURITY=3333333333333
     KEY=6777777777777