Five ways to share the configuration file load in the Python flask framework

This article shares five ways to use the configuration file load in the Python flask framework

Flask several ways to manage profiles:

Method One: Direct configuration

#!/usr/bin/env python# encoding:utf-8from flask import Flaskimport Timeapp = Flask (__name__) app.config[' SEND_FILE_MAX_ Age_default ']=time.asctime () app.config[' HOST ']= ' www.aolens.cn ' Print app.config@app.route ('/') def hello_world ():   return ' Hello world!  %s  %s '% (App.config.get (' Send_file_max_age_default '), App.config.get (' HOST ')) if __name__== ' __main__ ':   App.run ()

You can see a large dictionary of the global:

<config {' json_as_ascii ': True, ' use_x_sendfile ': False, ' Session_cookie_path ': None, ' Session_cookie_domain ': none , ' session_cookie_name ': ' SESSION ', ' session_refresh_each_request ': True, ' logger_handler_policy ': ' Always ', ' logger_ NAME ': ' __main__ ', ' DEBUG ': false, ' Secret_key ': None, ' explain_template_loading ': false, ' max_content_length ': none, ' Application_root ': None, ' server_name ': None, ' preferred_url_scheme ': ' http ', ' jsonify_prettyprint_regular ': True, ' Testing ': False, ' HOST ': ' www.aolens.cn ', ' permanent_session_lifetime ': Datetime.timedelta, ' Propagate_ EXCEPTIONS ': None, ' templates_auto_reload ': None, ' trap_bad_request_errors ': False, ' Json_sort_keys ': True, ' Jsonify_ MIMETYPE ': ' Application/json ', ' session_cookie_httponly ': True, ' send_file_max_age_default ': ' Thu Mar 2 16:33:17 2017 ', ' Preserve_context_on_exception ': None, ' session_cookie_secure ': False, ' trap_http_exceptions ': false}>

Method Two: Load the configuration with environment variables

Create an environment variable file. config.py

# content is a key value, not necessarily a large dictionary of host=localhostpost=3306   #自己创建export config_set=./config.py Code: App.config.from_envvar (' Config_set) @app. Route ('/') def hello_world (): Return "Hello World%s%s"% (App.config.get (' HOST '), App.config.get (' POST '))

Method Three: Load by object (common)--from_object ()

Config object code-based on the class inheritance of the config structure, save the default configuration of the Config class as the base class, other classes inherit.

Create a file configlist.py

#!/usr/bin/env python# Encoding:utf-8class Config ():   #父类可以被下边的类继承到AUTHOR参数   author= ' Aolens ' class Developmentconfig (Config):   DEBUG = True   sql_uri= ' Mysql://root:password@192.168.1.101/test ' class Productionconfig (Config):   sql_uri= ' mysql://root:password@192.168.1.101/devops '   host= ' localhost ' Config = {#将类写成字典的形式存储   ' dev ':D evelopmentconfig,   ' Pro ':P roductionconfig,   ' default ':D Evelopmentconfig}

Call configlist.py

#!/usr/bin/env python# encoding:utf-8from flask Import flaskfrom configlist import *import Timeapp = Flask (__name__) #对象加载 , the FROM config import * #第一种加载方式app. Config.from_object (productionconfig) #第二种加载方式, loading the short config can also be loaded to #app.config.from _object (config[' Pro ') print app.config@app.route ('/')    #/means the URL behind +/, or other URIs, Access is Ip+uridef Hello_world ():   Return ' Hello world!  %s%s  '% (app.config.get (' Sql_uri '), App.config.get (' HOST '), App.config.get (' AUTHOR ')) if __name__== ' __main__ ' :   App.run ()

Browser Access results:

Hello world! Mysql://root:password@192.168.1.101/devops localhost Aolens

How to determine the test environment or production: #!/usr/bin/env python# encoding:utf-8from flask Import flaskfrom config2 import *import osimport Timeapp = F Lask (__name__) if Os.path.exists ("./pro"): App.config.from_object   (config[' Pro ']) elif os.path.exists ("./dev"):   App.config.from_object (developmentconfig)  print app.config@app.route ('/test ') def hello_world ():   Return ' Hello world!  %s%s  '% (app.config.get (' Sql_uri '), App.config.get (' HOST '), App.config.get (' AUTHOR ')) if __name__== ' __main__ ' :   App.run ()

Method Four: Through the configuration file--app.config.from_pyfile,config file must be in the app directory

Vim confile.pyhost= ' locolhost ' port=10000author= ' aolens ' from flask import Flaskapp.config.from_pyfile ('./confile.py ') #加载配置文件print app.config@app.route ('/test ') def hello_world ():   return ' Hello world!  %s%s  '% (app.config.get (' PORT '), App.config.get (' HOST '), App.config.get (' AUTHOR ')) if __name__== ' __main__ ':   App.run ()

Method Five: is a kind of improvement to method four Configparser module configuration file Management

Configparser Introduction:

Is the package that is used to read the configuration file, and the parentheses in the configuration file contain the session. section below is a configuration file content similar to Key-value.

The format is as follows:

Vim Test.conf[api] #sessionport =11111 #optionpath =/data/api/log[web]port=1002path=/data/web/log

Use: confile.py

Import configparserdef GetConfig (filename,section= "):   cf=configparser.configparser ()   #实例化   Cf.read ( FileName)   #读取配置文件   cf_items = dict (cf.items (section)) If Cf.has_section (section)  else {}  # To determine if a section exists, there are data stored in a dictionary, no return empty dictionary returns   cf_itemsif __name__== ' __main__ ':   conf =getconfig (' test.conf ', ' web '   Print conf   print conf[' port ']   print conf.get (' path ')

Operation Result:

{' path ': '/data/web/log ', ' Port ': ' 1002 '}

1002

/data/web/log

Call: demo.py

#!/usr/bin/env python# encoding:utf-8from confile import getconfigfrom flask Import Flaskapp = Flask (__name__) #直接配置 @app. Route ('/test ') def hello_world ():     conf=getconfig (' test.conf ', ' API ')     return ' Hello world!   %s '% (conf[' Port ']) if __name__== ' __main__ ':     app.run ()

Results:

Hello world! 11111 #option