python_coroutine.py

from collections import namedtuple

Result = namedtuple('Result', 'Count Averge')

def averger():
    count = 0
    total = 0
    avg = None
    while True:
        term = yield avg
        if term is None:
            break
        total += term
        count += 1
        avg = total / count
    return Result(count, avg)


avger = averger()
avger.send(None)

for i in range(1, 11):
    print(avger.send(i))

try:
    res = avger.send(None)
except StopIteration as e:
    res = e.value
print(res)

# 1.0
# 1.5
# 2.0
# 2.5
# 3.0
# 3.5
# 4.0
# 4.5
# 5.0
# 5.5
# Result(Count=10, Averge=5.5)

Python协程一个demo，注意获取最后值的方法，如果使用return语句，那么只能在 StopIteration.value中得到该值。