generator-2.py

#Reference: http://pythoncentral.io/python-generators-and-yield-keyword/
from time import sleep
def hold_client(name):
    yield 'Hello, %s! You will be connected soon' % name
    yield 'Dear %s, could you please wait a bit.' % name
    yield 'Sorry %s, we will play a nice music for you!' % name
    yield '%s, your call is extremely important to us!' % name
    yield '%s, please call back latter' % name

# putting it all together
def example1(name,duration):
    result = hold_client(name)
    response_time = duration #seconds
    try:
        while True:
            print(next(result))
            sleep(response_time) 
    except StopIteration:
        #pass statement does nothing, silently ignored and can be used is as a place-holder
        pass
    finally:
        #delete generator
        del result

example1("Harish", 5)