利用flask 实现简单模版站

 from flask import Flask,render_template
 from flask import request
 app = Flask(__name__)

 @app.route('/',methods=['GET','POST'])
 def home():
     return render_template('home.html')

 @app.route('/signin',methods=['GET'])
 def signin_from():
     return render_template('form.html')
 @app.route('/signin',methods=['POST'])
 def signin():
     username = request.form['username']
     password = request.form['password']
     if username=='admin' and password=='password':
         return render_template('signin_ok.html',username=username)
     return render_template('form.html',message='bad username or password',username=username)

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