《Flask Web开发》学习笔记之bug--（6）【TypeError: __init__() got an unexpected keyword argument 'method'】

# hello.py

from datetime import datetime
from flask import Flask, render_template
from flask_script import Manager
from flask_bootstrap import Bootstrap
from flask_moment import Moment
from flask_wtf import Form
from wtforms import StringField, SubmitField
from wtforms.validators import Required

app = Flask(__name__)
app.config['SECRET_KEY'] = 'hard to guess string'

manager = Manager(app)
bootstrap = Bootstrap(app)
moment = Moment(app)

class NameForm(Form):
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('/user/<name>')
def user(name):
return render_template('user.html', name=name)

@app.route('/', method=['GET', 'POST'])
def index():
name = None
form = NameForm()
if form.validate_on_submit():
name = form.name.data
form.name.data = ''
return render_template('index.html', form=form, name=name)

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

Traceback (most recent call last):
File "hello.py", line 34, in <module>
@app.route('/', method=['GET', 'POST'])
File "/home/henry/.local/lib/python3.5/site-packages/flask/app.py", line 1080, in decorator
self.add_url_rule(rule, endpoint, f, **options)
File "/home/henry/.local/lib/python3.5/site-packages/flask/app.py", line 64, in wrapper_func
return f(self, *args, **kwargs)
File "/home/henry/.local/lib/python3.5/site-packages/flask/app.py", line 1043, in add_url_rule
rule = self.url_rule_class(rule, methods=methods, **options)
TypeError: __init__() got an unexpected keyword argument 'method'