flask基础

# 引入Flask库
from flask import Flask


# 实例化，创建对象
app = Flask(__name__)

# 设置路由
@app.route(‘/‘)
# 定义视图函数
def index():
    return ‘Hello World, this is my first flask web app!‘


if __name__ == ‘__main__‘:
    app.run()

# 引入Flask库
from flask import Flask

# 实例化，创建对象
# app = Flask(__name__)
app=Flask(import_name=__name__,static_url_path="/s",static_folder="static_file",template_folder="template_file")

# 设置路由
@app.route(‘/‘)
# 定义视图函数
def index():
    return ‘Hello World, this is my first flask web app!‘

if __name__ == ‘__main__‘:

    app.run()

# 引入Flask库
from flask import Flask
class DefaultConfig(object):
    SECRETE_KEY="abcd" #必须大写

# 实例化，创建对象
app = Flask(__name__)

#设置
app.config.from_object(DefaultConfig)

# 设置路由
@app.route(‘/‘)
# 定义视图函数
def index():
    print(app.config["SECRETE_KEY"])
    return ‘Hello World, this is my first flask web app!‘

if __name__ == ‘__main__‘:
    app.run()

# 引入Flask库
from flask import Flask

# 实例化，创建对象
app = Flask(__name__)
#设置
app.config.from_pyfile("setting.py")

# 设置路由
@app.route(‘/‘)
# 定义视图函数
def index():
    print(app.config["SECRETE_KEY"])
    return ‘Hello World, this is my first flask web app!‘

if __name__ == ‘__main__‘:
    app.run()

# 引入Flask库
from flask import Flask

# 实例化，创建对象
app = Flask(__name__)
#设置环境变量 export PROJECT_SETTING="setting.py"
app.config.from_envvar("PROJECT_SETTING",silent=True)

# 设置路由
@app.route(‘/‘)
# 定义视图函数
def index():
    print(app.config["SECRETE_KEY"])
    return ‘Hello World, this is my first flask web app!‘

if __name__ == ‘__main__‘:
    app.run()