This code is practical mainly in the trivial sense that it runs to completion.

# -*- coding: utf-8 -*-
"""
Created on Sun Jan  3 13:51:20 2016

@author: kurner
"""
import itertools

def assemble():
    drv = yield None
    drv.result = 1
    drv = yield drv
    drv.result += 1
    drv.name = "Alvin"
    drv = yield drv
    drv.result += 1
    drv.color = "Red"
    drv = yield drv
    drv.result += 1
    drv.age = 100
    return drv

class Driver:
   
    def __init__(self, g):
        self.g = g
        self.g.send(None) # primed
        self.counter = 1

    def go(self):
        while True:
            try:
                self.counter *= 10
                self = self.g.send(self)
            except StopIteration as exc:
                return exc.args[0].__dict__
           
d = Driver(assemble())
r = d.go()
print(r)  

Console output:

{'name': 'Alvin', 'color': 'Red', 'age': 100, 'counter': 10000, 'g': <generator object assemble at 0x110078af0>, 'result': 4}