Test Python yield

test_yield.py

#coding: utf-8

from datetime import datetime
import time

# ==============================================================================
#  Test yield
# ==============================================================================
def test_yield():
    for i in range(4):
        print '[%s] >> Start processing......%d' % (datetime.now(), i)
        time.sleep(2)
        print '[%s] >> DONE ......%d' % (datetime.now(), i)
        yield i

for t in test_yield():
    print '[%s] >> %d' % (datetime.now(), t)
    print '----------------------------------------'

print '============================================================'


# ==============================================================================
#  Test generator
# ==============================================================================
def process(i):
    print '[%s] >> Start processing......%d' % (datetime.now(), i)
    time.sleep(2)
    print '[%s] >> DONE ......%d' % (datetime.now(), i)
    return i

for t in (process(i) for i in range(4)):
    print '[%s] >> %d' % (datetime.now(), t)
    print '----------------------------------------'