@app.route('/',methods=['GET'])
def hello():
  return '<h1>hello world</h1>'

@app.route('/')
def hello():
  return '<h1>hello world</h1>'
@app.route('/')
def hello_2017():
  return '<h1>hello 2017</h1>'

@app.route('/user/<int:id>')
def hello_itheima(id):
  return 'hello itcast %d' %id

from flask import redirect
@app.route('/')
def hello_itheima():
  return redirect('http://www.itcast.cn')

from flask import Flask,json
@app.route('/json')
def do_json():
  hello = {"name":"stranger", "say":"hello"}
  return json.dumps(hello)

@app.route('/')
def hello_itheima():
  return 'hello itcast',666

from werkzeug.routing import BaseConverter

# 自定义转换器
class Regex_url(BaseConverter):
  def __init__(self,url_map,*args):
    super(Regex_url,self).__init__(url_map)
    self.regex = args[0]
app = Flask(__name__)
# 将自定义转换器类添加到转换器字典中
app.url_map.converters['re'] = Regex_url
@app.route('/user/<re("[a-z]{3}"):id>')
def hello_itheima(id):
  return 'hello %s' %id

DEFAULT_CONVERTERS = {
  'default':     UnicodeConverter,
  'string':      UnicodeConverter,
  'any':       AnyConverter,
  'path':       PathConverter,
  'int':       IntegerConverter,
  'float':      FloatConverter,
  'uuid':       UUIDConverter,
}