import time
import datetime
def gen_timestamp01():
\'\'\'2017-07-11 21:57:00\'\'\'
while 1:
yield datetime.datetime.fromtimestamp(time.time()).strftime(\'%Y-%m-%d %H:%M:%S\')
def gen_timestamp02():
\'\'\'2017-07-12 00:57:00.918545\'\'\'
while 1:
yield datetime.datetime.utcnow()
def gen_timestamp03():
\'\'\'2017-07-11 21:57:00.918561\'\'\'
while 1:
yield datetime.datetime.now()
def gen_timestamp04():
\'\'\'2017-07-11T21:57:00.918574\'\'\'
while 1:
yield datetime.datetime.now().isoformat()
def gen_timestamp05():
\'\'\'2017-07-12 00:57:00.918585\'\'\'
while 1:
yield datetime.datetime.utcfromtimestamp(time.time())
if __name__ == \'__main__\':
a = gen_timestamp01()
b = gen_timestamp02()
c = gen_timestamp03()
d = gen_timestamp04()
e = gen_timestamp05()
print(next(a))
print(next(b))
print(next(c))
print(next(d))
print(next(e))