Producer and Consumer Model

Producer and consumer models, and this function is the process of executing concurrent operations in a single thread 
import time
 def consume(name):
     print ( ' I am %s, I am going to start eating buns ' % name)
     while True:
        baozi = yield #The yield in the function is the generator function 
        time.sleep(1 )
         print ( ' %s ate the buns happily [%s] ' % (name,baozi))
 def producer():
    c1=consume('cat')
    c2=consume('dog')
    c1. __next__ () # As soon as you encounter yield, wait for the bun, and the program will not execute down there in yield 
    # c2.__next__() 
    # for i in range(10): 
    time.sleep(1 )
    c1.send( ' beef stuffing ' )
         # c2.send('pork stuffing, steamed buns%s'%i) 
producer()
 #Concurrency is to process two functions at the same time, or multiple functions, concurrency in a single thread