from flask import Flask, request
from flask.ext.restful import Resource, Api

app = Flask(__name__)
api = Api(app)

todos = {}
i = 0

class TodoSimple(Resource):

    def get(self, tid):
        return {"tid": tid, "todo": todos[tid]}

    def put(self):
        global i
        tid = i
        i = i + 1
        todos[tid] = request.form['data']
        return {"tid": tid, "todo": todos[tid]}

    def post(self, tid):
        todos[tid] = request.form['data']
        return {"todo": todos[tid]}

    def delete(self, tid):
        deldata = todos[tid]
        del(todos[tid])
        return {"tid": tid, "todo": deldata}

api.add_resource(TodoSimple, '/', '/<int:tid>')

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

$ curl http://localhost:5000/ -d "data=Remember the Flask" -X PUT
{"tid": 0, "todo": "Remember the Flask"}
$ curl http://localhost:5000/ -d "data=Remember the Python" -X PUT
{"tid": 1, "todo": "Remember the Python"}
$ curl http://localhost:5000/0
{"tid": 0, "todo": "Remember the Flask"}
$ curl http://localhost:5000/0 -d "data=Remember the Sphinx" -X POST
{"todo": "Remember the Sphinx"}
$ curl http://localhost:5000/0
{"tid": 0, "todo": "Remember the Sphinx"}
$ curl http://localhost:5000/0 -X DELETE
{"tid": 0, "todo": "Remember the Sphinx"}
$ curl http://localhost:5000/0
{"status": 500, "message": "Internal Server Error"}