Share an example code about yield

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is as follows:

def go():
  while True:
    data = 1
    r = yield data # data是返回值，r是接收值
    print("data", data)
    print("A1", r)
    data += 1

    r = yield data
    print("data",data)
    r += r
    print("A2", r)
    data += 1

    r = yield data
    print("data",data)
    print("A3", r)
    # 运行时此后若找不到下一个yield，则会报错StopIteration

my = go()
print("my", my)
print("None", my.send(None))
print(my.send("1"))
print(my.send("2"))
print(my.send("3"))

①my.send(None): means starting the coroutine. This step will return the data value after the first yield.

②send Once, the code run is the code between the two yields, and finally the data value after the next yield is returned. If the latter yield statement is missing, The error "Stoplteration"

③r = yield data

r is passed in by my.send('incoming data') Data

data is the data returned after running this section

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