Python运行报错?报错

# -*- coding: utf-8 -*- from flask import Flask from flask import request
app=Flask(__name__)
@app.route('/',methods=['GET','POST']) def home():     return '<h1>home</h1>' @app.route('/signin',methods=['GET']) def signin_form():     return '''<form action="/signin" method="post">  <p><input name="username"></p>  <p><input name="password" type="password"></p>  <p><button type="submit">SINGN IN</button></p>  </form>''' @app.route('/signin',methods=['POST'])
 def signin(): #需要从request读取表单内容       if request.form['username']=='admin' and request.form['password']=='123':  return '<h2>hello admin</h2>'  return '<h3>bad username or password</h3>'  if __name__=='__main__':
    app.run()




运行错误：UnicodeDecodeError: 'utf-8' codec can't decode byte 0xcb in position 0: invalid continuation byte