datetime

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import datetime
i = datetime.datetime.now()
print (" %s" % i)
print ("ISO %s" % i.isoformat() )
print (" %s" %i.year)
print (" %s" %i.month)
print ("  %s" %i.day)
print ("dd/mm/yyyy   %s/%s/%s" % (i.day, i.month, i.year) )
print (" %s" %i.hour)
print (" %s" %i.minute)
print ("  %s" %i.second)

#!/usr/bin/python
# -*- coding: UTF-8 -*-

from datetime import datetime
from datetime import date
from datetime import time as time_datetime
import time
from datetime import timedelta

# ------------------1-------------#

# 
print(time.time())

# 
print(time.localtime(time.time()))
print(time.gmtime(time.time()))

# 
print(time.strftime("%Y-%m-%d", time.localtime(time.time())))
print(time.strftime("%Y-%m-%d", time.gmtime(time.time())))

# 
print(time.strftime("%Y-%m-%d"))

# datetime
print(datetime.fromtimestamp(time.time()).strftime("%Y-%m-%d"))
print(datetime.now().strftime("%Y-%m-%d"))
print(datetime.today().strftime("%Y-%m-%d"))

# ------------------2-------------#

# time 
start = time.time()
time.sleep(1)
print(time.time() - start)

# datetime
start = datetime.now()
time.sleep(1)
print((datetime.now() - start).seconds)

# 
print(datetime.now() - timedelta(days=1))

# 
print(time.mktime(time.localtime()))  # localtime
print(time.mktime(time.gmtime()))  # gmtime
print(time.mktime(datetime.now().timetuple()))  # datetime

# 
print(time.strptime("2019-07-14 11:23:33", "%Y-%m-%d %H:%M:%S"))

# 
# 1. (1970.1.1 00:00:00),
# 2.  (struct_time),struct_time

# ------------------3time-------------#
# time.clock
# UNIX“”
# WINDOWS
# WIN32 QueryPerformanceCounter()
# 

start = time.clock()
time.sleep(1)
print(time.clock() - start)

# 
print(time.localtime())
print(time.localtime(time.time()))

# 
print(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))

# 
print(time.mktime(time.localtime()))
print(time.mktime(time.gmtime()))
print(time.mktime(datetime.now().timetuple()))

# ------------------4datetime-------------#
# 1.datetime.date: ()
# 2.datetime.time: 24()
# 3.datetime.datetime: 
# 4.datetime.timedelta: (timedelta)(datetime)(timedelta)
# (datetime)358
# 
print(date.today())

# 
print(date(2018, 1, 1))

# 
print(date.today().strftime("%Y%m%d"))

# 0
print(date.today().timetuple())

# 
print(date.fromtimestamp(time.time()))

# datetimetime
t = time_datetime(8, 11, 11)
print(t)

# 
print(t.strftime("%H-%M-%S"))

# datetimedatetime.datetime.today()
# datetime.datetime()
print(datetime.today())
print(datetime.now())
print(datetime(2014, 8, 15, 8, 12, 34, 790945))

# datetime.datetime.now([tz]) datetime.datetime.today()
# 
print(datetime.now().strftime("%H-%M-%S"))

# 
print(datetime.now().timetuple())
print(time.mktime(datetime.now().timetuple()))

# 
d1 = datetime(2014, 8, 15, 8, 12, 34, 790945)
print(d1.replace(year=2000))

# ------------------5timedelta-------------#
print(datetime.today())
print(datetime.today() - timedelta(days=1))