flask第二十一篇——练习题

# coding: utf-8

from flask import Flask
from werkzeug.routing import BaseConverter

app = Flask(__name__)  # type: Flask
app.debug = True

@app.route('/')
def hello_world():
    return 'Hello World!'

class NumConverter(BaseConverter):

    regex = r'\d+-\d+'

    # 把url中的参数传到视图函数中，用to_python方法
    def to_python(self, value):
        tmp = value.split('-')
        if int(tmp[0]) < int(tmp[-1]):
            nums = range(int(tmp[0]), int(tmp[-1])+1)
            return str(nums)
        else:
            return u'请检查传入的参数'

    # 把类似[1,2,3]这样的列表转换成/1-3/这种url
    def to_url(self, value):
        min = value[0]
        max = value[-1]
        temp = '%s-%s' % (min, max)
        return temp

app.url_map.converters['num'] = NumConverter

@app.route('/login/<num: values>/')
def numList(values):
    return values

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