1.静态显示
from flask import Flask
app=Flask(__name__)
@app.route('/')
def index(): return <h1>Hello World! </h1>
@app.route('/user/<name>') def user(name): return '<h1>Hello, %s!</h1>' % name
if __name__=='__main__':
app.run(debug=True)//如果想让别人访问则把debug=True改成host=‘0.0.0.0’
2.动态显示
3.渲染成网页利用模板base.html文件美化
from flask import Flask, render_template from flask_script import Manager app = Flask(__name__) manager = Manager(app) @app.route('/') def index(): return render_template('index.html')
@app.route('/user/<name>') def user(name): return render_template('user.html', name=name) if __name__ == '__main__': manager.run()
4.创建表单
5.挂库＋表单
from flask import Flask, render_template, session, redirect, url_for, flash from flask_script import Manager from flask_bootstrap import Bootstrap from flask_moment import Moment from flask_wtf import FlaskForm from wtforms import StringField, SubmitField from wtforms.validators import Required from flask_sqlalchemy import SQLAlchemy app = Flask(__name__)
#令牌加密 app.config['SECRET_KEY'] = 'hard to guess' #挂库 app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:viz2015@localhost:3306/datanews' app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True manager = Manager(app) bootstrap = Bootstrap(app) moment = Moment(app) db = SQLAlchemy(app) class Role(db.Model): __tablename__ = 'roles' id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(64), unique=True) users = db.relationship('User', backref='role', lazy='dynamic') def __repr__(self): return '<Role %r>' % self.name class User(db.Model): __tablename__ = 'users' id = db.Column(db.Integer, primary_key=True) username = db.Column(db.String(64), unique=True, index=True) role_id = db.Column(db.Integer, db.ForeignKey('roles.id')) def __repr__(self): return '<User %r>' % self.username #a表单 class NameForm(FlaskForm): name = StringField('What is your name?', validators=[Required()]) submit = SubmitField('Submit') @app.errorhandler(404) def page_not_found(e): return render_template('404.html'), 404 @app.errorhandler(500) def internal_server_error(e): return render_template('500.html'), 500 @app.route('/', methods=['GET', 'POST']) def index(): form = NameForm() if form.validate_on_submit(): old_name = session.get('name') if old_name is not None and old_name != form.name.data: flash('Looks like you have changed your name!') session['name'] = form.name.data return redirect(url_for('index')) return render_template('index.html', form=form, name=session.get('name')) if __name__ == '__main__': db.create_all() manager.run()
