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python的flask怎么配置

发布时间:2021-08-17 09:21:54 来源:亿速云 阅读:172 作者:chen 栏目:编程语言

这篇文章主要讲解了“python的flask怎么配置”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“python的flask怎么配置”吧!

  配置flask的一些问题

  首先给上相关配置代码

  manage.py

  import os

  from flask_migrate import MigrateCommand

  from App import creat_app

  from flask_script import Manager

  # env=os.environ.get('default')

  app =creat_app(env='default')

  manager=Manager(app)

  manager.add_command("db",MigrateCommand)

  if __name__ == '__main__':

  manager.run()

  init.py

  from flask import Flask

  from App.ext import init_ext

  from App.settings import envs

  from App.views import init_blue

  def creat_app(env):

  app=Flask(__name__)

  app.config.from_object(envs.get(env))

  init_ext(app)

  init_blue(app)

  return app

  ext.py

  from flask_sqlalchemy import SQLAlchemy

  from flask_migrate import Migrate

  from flask_bootstrap import Bootstrap

  from flask_session import Session

  db=SQLAlchemy()

  migrate=Migrate()

  def init_ext(app):

  db.app=app

  db.init_app(app)

  migrate.init_app(app,db)

  Session(app)

  Bootstrap(app)

  setting.py

  import os

  BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

  def get_db_uri(dbinfo):

  engine = dbinfo.get("ENGINE")

  driver = dbinfo.get("DRIVER")

  user = dbinfo.get("USER")

  password = dbinfo.get("PASSWORD")

  host = dbinfo.get("HOST")

  port = dbinfo.get("PORT")

  name = dbinfo.get("NAME")

  return '{}+{}://{}:{}@{}:{}/{}'.format(engine, driver, user, password, host, port, name)

  class Config:

  DEBUG = False

  TESTING = False

  SQLALCHEMY_TRACK_MODIFICATIONS = False

  SECRET_KEY='Rock'

  SESSION_TYPE='redis'

  SESSION_COOKIE_SECURE=True

  SESSION_USE_SIGNER=True

  @staticmethod

  def init_app(app):

  pass

  class DevelopConfig(Config):

  DEBUG = True

  dbinfo = {

  "ENGINE": "mysql",

  "DRIVER": "pymysql",

  "USER": "root",

  "PASSWORD": "123456",

  "HOST": "localhost",

  "PORT": "3306",

  "NAME": "flask",

  }

  SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo)

  class TestConfig(Config):

  TESTING = True

  dbinfo = {

  "ENGINE": "mysql",

  "DRIVER": "pymysql",

  "USER": "root",

  "PASSWORD": "123456",

  "HOST": "localhost",

  "PORT": "3306",

  "NAME": "flask",

  }

  SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo)

  class StagingConfig(Config):

  dbinfo = {

  "ENGINE": "mysql",

  "DRIVER": "pymysql",

  "USER": "root",

  "PASSWORD": "123456",

  "HOST": "localhost",

  "PORT": "3306",

  "NAME": "flask",

  }

  SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo)

  class ProductConfig(Config):

  dbinfo = {

  "ENGINE": "mysql",

  "DRIVER": "pymysql",

  "USER": "root",

  "PASSWORD": "123456",

  "HOST": "localhost",

  "PORT": "3306",

  "NAME": "flask",

  }

  SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo)

  envs = {

  'develop': DevelopConfig,

  'testing': TestConfig,

  'stage': StagingConfig,

  'product': ProductConfig,

  'default': DevelopConfig,

  }

  views.py郑州做人流多少钱 http://www.120zzzzyy.com/

  from flask import Blueprint, render_template, request, Response, session

  blue=Blueprint('blue',__name__)

  def init_blue(app):

  app.register_blueprint(blue)

  @blue.route("/login",methods=["GET","POST"])

  def login():

  if request.method=='GET':

  return render_template("login.html")

  elif request.method=="POST":

  username=request.form.get("username")

  # return render_template("login.html",username=username)

  # response=Response("%s" % username)

  # # response.set_cookie('username',username)

  # session['username']=username

  # return response

  return render_template("login.html")

  login.html

  {% extends 'bootstrap/base.html' %}

  {% block navbar %}

  Toggle navigation

  Brand

  Link (current)

  Link

  Dropdown

  Action

  Another action

  Something else here

  Separated link

  One more separated link

  Submit

  Link

  Dropdown

  Action

  Another action

  Something else here

  Separated link

  {% endblock %}

  {% block content %}

  {% endblock %}

  {% block header %}

  {% endblock %}

  {% block container %}

  {% endblock %}

  {% block footer %}

  {% endblock %}

  以上是我写的所有代码,在配置过程中遇到了一些问题所以拿出来分享以下,希望能帮助到你们。

  第一个问题

python的flask怎么配置

  首先我发现上面的env=os.environ.get(‘default’)这个方法,在我操作的过程中是没法将default传到给creat_app(),因此,他就获得不了default相关配置信息,于是运行后他就会报错,如以下报错信息

  UserWarning: Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".

  Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set.

  以下是init_app中提取出来的信息

  if (

  'SQLALCHEMY_DATABASE_URI' not in app.config and

  'SQLALCHEMY_BINDS' not in app.config

  ):

  warnings.warn(

  'Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. '

  'Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".'

  )

  可以看出他是没有获取到SQLALCHEMY_DATABASE_URI和SQLALCHEMY_BINDS才报错的,而这个是写在setting中的,所以我直接将default赋给env,之后他不会报错。,也没有出现这个报错信息。

  然后第二个问题:

  SESSION_TYPE='redis'

  我在运行的时候出现了这个问题

  redis.exceptions.ConnectionError: Error 10061 connecting to 127.0.0.1:6379. 由于目标计算机积极拒绝,无法连接 是由于没有启动redis服务,解决方法如下:

  启动后就没问题了

感谢各位的阅读,以上就是“python的flask怎么配置”的内容了,经过本文的学习后,相信大家对python的flask怎么配置这一问题有了更深刻的体会,具体使用情况还需要大家实践验证。这里是亿速云,小编将为大家推送更多相关知识点的文章,欢迎关注!

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