python实战: 解析yaml配置文件

 

一，生成目录和生成配置文件

创建目录和配置文件

[liuhongdi@img news]$ mkdir conf
[liuhongdi@img news]$ cd conf/
[liuhongdi@img conf]$ vi conf.yaml
[liuhongdi@img conf]$ more conf.yaml

查看文件内容：

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data_dev:   host: 127.0.0.1   port: 3306   user: root   password: password123   database: learning   charset: utf8 data_prd:   host: 127.0.0.1   port: 3306   user: root   password: password123   database: learning-prod   charset: utf8

说明：刘宏缔的架构森林—专注it技术的博客，
网址：https://imgtouch.com
本文: https://blog.imgtouch.com/index.php/2024/02/19/jie-xi-yaml-pei-zhi-wen-jian/
代码: https://github.com/liuhongdi/ 或 https://gitee.com/liuhongdi
说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，安装相关的库PyYAML

1，用pip安装:

(venv) [liuhongdi@img news]$ pip3 install PyYAML
Collecting PyYAML
  Downloading PyYAML-6.0.1-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (757 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 757.7/757.7 kB 12.6 kB/s eta 0:00:00
Installing collected packages: PyYAML
Successfully installed PyYAML-6.0.1
[notice] A new release of pip is available: 23.1.2 -> 24.0
[notice] To update, run: pip install --upgrade pip

安装完成后查看已安装库的版本:

(venv) [liuhongdi@img news]$ pip3 show PyYAML
Name: PyYAML
Version: 6.0.1
Summary: YAML parser and emitter for Python
Home-page: https://pyyaml.org/
Author: Kirill Simonov
Author-email: xi@resolvent.net
License: MIT
Location: /web/site/python/news/venv/lib/python3.11/site-packages
Requires:
Required-by:

三，编写代码读取yaml文件:

1,代码:

handle_yaml.py

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import yaml     class ConfYaml:  # 操作conf.yaml文件的     def __init__(self, file):         self.file = file       def read_yaml(self, node='', encoding='utf-8'):         """读取yaml数据"""         with open(self.file, encoding=encoding) as f:             conf = yaml.load(f.read(), Loader=yaml.FullLoader)             if node == '':                 return conf             else:                 return conf[node]     if __name__ == '__main__':     conf_file = "../../conf/conf.yaml"     conf_yaml = ConfYaml(conf_file)     node = 'data_prd'     conf_node = conf_yaml.read_yaml(node)  # 返回是字典格式，所以直接下标取数据     print(conf_node)       host = conf_node['host']     port = conf_node['port']     user = conf_node['user']     pswd = conf_node['password']     base = conf_node['database']     char = conf_node['charset']       print("host:", host)     print("port:", port)     print("user:", user)     print("password", pswd)     print("database:", base)     print("charset:", char)

运行结果:

{'host': '127.0.0.1', 'port': 3307, 'user': 'root', 'password': 'password123', 'database': 'learning-prod', 'charset': 'utf8'}
host: 127.0.0.1
port: 3307
user: root
password password123
database: learning-prod
charset: utf8