flask中config

def get_db_uri(dbinfo):     ENGINE = dbinfo.get("ENGINE") or 'mysql'     DRIVER = dbinfo.get("DRIVER") or "pymysql"     USER = dbinfo.get("USER") or "root"     PASSWORD = dbinfo.get("PASSWORD") or "cjsoft100"     HOST = dbinfo.get("HOST") or "cdb-pi42xze4.bj.tencentcdb.com"     PORT = dbinfo.get("PORT") or "10091"     NAME = dbinfo.get("NAME") or "develop"      print("{}+{}://{}:{}@{}:{}/{}".format(ENGINE, DRIVER, USER, PASSWORD, HOST, PORT, NAME))     return "{}+{}://{}:{}@{}:{}/{}".format(ENGINE, DRIVER, USER, PASSWORD, HOST, PORT, NAME)   class Config:      DEBUG = False      TESTING = False      SECRET_KEY = "dsgsdhsa"      SQLALCHEMY_TRACK_MODIFICATIONS = False   class DevelopConfig(Config):      DEBUG = True      DATABASE = {         "ENGINE": "mysql",         "DRIVER": "pymysql",         "USER": "root",         "PASSWORD": "123456",         "HOST": "127.0.0.1",         "PORT": "3306",         "NAME": "shop"     }      SQLALCHEMY_DATABASE_URI = get_db_uri(DATABASE)   class TestingConfig(Config):      TESTING = True      DATABASE = {         "ENGINE": "mysql",         "DRIVER": "pymysql",         "USER": "root",         "PASSWORD": "cjsoft100",         "HOST": "cdb-pi42xze4.bj.tencentcdb.com",         "PORT": "10091",         "NAME": "shop"     }      SQLALCHEMY_DATABASE_URI = get_db_uri(DATABASE)   class StagingConfig(Config):      DATABASE = {         "ENGINE": "mysql",         "DRIVER": "pymysql",         "USER": "root",         "PASSWORD": "cjsoft100",         "HOST": "cdb-pi42xze4.bj.tencentcdb.com",         "PORT": "10091",         "NAME": "shop"     }      SQLALCHEMY_DATABASE_URI = get_db_uri(DATABASE)   class ProductConfig(Config):      DATABASE = {         "ENGINE": "mysql",         "DRIVER": "pymysql",         "USER": "root",         "PASSWORD": "cjsoft100",         "HOST": "cdb-pi42xze4.bj.tencentcdb.com",         "PORT": "10091",         "NAME": "shop"     }      SQLALCHEMY_DATABASE_URI = get_db_uri(DATABASE)   envs = {     "develop": DevelopConfig,     "testing": TestingConfig,     "staging": StagingConfig,     "product": ProductConfig,     "default": DevelopConfig }

其实最终是把数据库的一些账号密码写成类的形式：

class Config:      DEBUG = False      TESTING = False      SECRET_KEY = "dsgsdhsa"      SQLALCHEMY_TRACK_MODIFICATIONS = False          SQLALCHEMY_DATABASE_URI = "{}+{}://{}:{}@{}:{}/{}".format(ENGINE, DRIVER, USER, PASSWORD, HOST, PORT, NAME)

然后用app.config.from_object(Config)

from flask import Flask  class Config:     DEBUG = False      TESTING = False      SECRET_KEY = "dsgsdhsa"      SQLALCHEMY_TRACK_MODIFICATIONS = False      SQLALCHEMY_DATABASE_URI = "{}+{}://{}:{}@{}:{}/{}".format(ENGINE, DRIVER, USER, PASSWORD, HOST, PORT, NAME)   def create_app(Config):     app = Flask(__name__)     # 用from_object方法写入配置类     app.config.from_object(Config)      return app  create_app(Config)

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