用配置文件里面的参数值替换yaml模板中的变量值【python】

#!/usr/bin/env python# -*- coding: utf-8 -*-# @Time    : 2019/9/20 15:44# @Site    : # @File    : VarsubYaml.py# @Software: PyCharm""""""import sys, osfrom contextlib import ExitStackprofileList = {}def PropValue(envfile):    with open(envfile) as profile:        new_profile = profile.readlines()        print(new_profile)        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 ExitStack()  as stack:            yml_file = stack.enter_context(open(yamlfile,'r+'))            yml_output = stack.enter_context(open(newyamlfile,'w'))            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 as e:        print("Error: " + format(str(e)))        raiseif __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

原文中的nested已经在python3中弃用了，改为ExitStack

参考：https://www.cnblogs.com/husbandmen/p/8783232.html