Python运行报错 'utf-8' codec can't decode byte 0xcb in position 0

Question

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():
    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()

Answer 1

檔案編碼問題，在python檔案第一行加上如下程式碼：

#coding: utf-8

Answer 2

#coding: utf-8