flask error

from flask import Flask
from flask import abort

app = Flask(__name__)

@app.route('/')
def index():
return 'index'

@app.route('/demo1')
def demo1():
# 主动抛出HTTP指定错误状态码
# abort(404)
a = 0
b = 1 / a
return 'demo1'

# 使用装饰器的形式去捕获指定的错误码和异常
@app.errorhandler(404)
def page_not_found(error):
return "咦~页面不见了~"

@app.errorhandler(ZeroDivisionError)
def zero_division_error(error):
return '除数不能为0'

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