flask几种参数配置方法

转自：http://heipark.iteye.com/blog/1746187

1. 直接配置

app.config['HOST']='xxx.a.com'  
print app.config.get('HOST')

2. 通过环境变量加载配置

export MyAppConfig=/path/to/settings.cfg

app.config.from_envvar('MyAppConfig')  

3. 通过对象加载

class Config(object):  
    DEBUG = False  
    TESTING = False  
    DATABASE_URI = 'sqlite://:memory:'  
  
class ProductionConfig(Config):  
    DATABASE_URI = 'mysql://user@localhost/foo'  
  
class DevelopmentConfig(Config):  
    DEBUG = True  
  
class TestingConfig(Config):  
    TESTING = True  
  
from flask import Flask  
app = Flask(__name__)  
  
app.config.from_object(ProductionConfig)  
print app.config.get('DATABASE_URI') # mysql://user@localhost/foo

# default_config.py   
HOST = 'localhost'  
PORT = 5000  
DEBUG = True

4. 通过文件配置

app.config.from_pyfile('default_config.py') #  这里defualt_config.py是文件

<pre name="code" class="python"># default_config.py
HOST = 'localhost'
PORT = 5000
DEBUG = True

#使用配置

<pre name="code" class="python">print app.config['HOST']