Application Factory
首先创建一个文件夹 flaskr
,然后在文件夹中创建一个文件 __init__.py
:
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| import os
from flask import Flask
def create_app(test_config=None):
# create and configure the app
app = Flask(__name__, instance_relative_config=True)
app.config.from_mapping(
SECRET_KEY='dev',
DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'),
)
if test_config is None:
# load the instance config, if it exists, when not testing
app.config.from_pyfile('config.py', silent=True)
else:
# load the test config if passed in
app.config.from_mapping(test_config)
# ensure the instance folder exists
try:
os.makedirs(app.instance_path)
except OSError:
pass
# a simple page that says hello
@app.route('/hello')
def hello():
return 'Hello, World!'
return app
|
create_app
就是项目函数,他主要完成的功能见http://flask.pocoo.org/docs/1.0/tutorial/factory/.
Run the application
需要先设置项目函数的包与开发的模式:
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| export FLASK_APP=flaskr
export FLASK_ENV=development
|
然后运行这个项目:
之后在浏览器中访问 http://127.0.0.1/hello
即可实现访问。