Python study, time module, example source code

import time

print( time.time() ) #the timestamp after 1970.1.1
#1393854889.330645
print( time.gmtime() ) #UTC
#time.struct_time(tm_year=2014, tm_mon=3, tm_mday=3, tm_hour=13, tm_min=54, tm_sec=49, tm_wday=0, tm_yday=62, tm_isdst=0)
print( time.localtime() ) #current time based on system
#time.struct_time(tm_year=2014, tm_mon=3, tm_mday=3, tm_hour=22, tm_min=54, tm_sec=49, tm_wday=0, tm_yday=62, tm_isdst=0)
t = time.gmtime(1234567890)
print( t )
#time.struct_time(tm_year=2009, tm_mon=2, tm_mday=13, tm_hour=23, tm_min=31, tm_sec=30, tm_wday=4, tm_yday=44, tm_isdst=0)

print( t.tm_mon )
print( t.tm_hour )
#2
#23

print( time.asctime(t) )
print( time.mktime(t) )
#Fri Feb 13 23:31:30 2009
#1234535490.0


#sleep
t = time.time()
time.sleep(1) #10 second sleep
t2 = time.time()

spendtime = t2 - t
print( "before timestamp: ", t)
print( "after timestamp: ", t2)
print( "wait {0} second".format(spendtime))
#before timestamp:  1393855412.738972
#after timestamp:  1393855413.740086
#wait 1.0011141300201416 second

from time import localtime, strftime
print( strftime( "%B %dth %A %I:%M", localtime() ) )
print( strftime( "%Y-%m-%d %I:%M", localtime() ) )
print( strftime( "%y/%m/%d %H:%M:%S", localtime() ) )
print( strftime("%y/%m/%d %H:%M:%S", localtime() ) )
print( strftime("%x %X", localtime()) )

#March 03th Monday 11:03
#2014-03-03 11:03
#14/03/03 23:03:33
#14/03/03 23:03:33
#03/03/14 23:03:33

import datetime
print( datetime.date(2009, 5, 5) )
#2009-05-05
print( datetime.date.fromtimestamp( time.time() ) )
#2014-03-03
print( datetime.date.today() )
#2014-03-03


d = datetime.date.today()
print( d.year )
print( d.month )
print( d.day )
print( d.max )
print( d.min )
#2014
#3
#3
#9999-12-31
#0001-01-01

d = datetime.date.today()
d2 = d.replace(day=25)
print(d, d2)
#2014-03-03 2014-03-25

d.timetuple()
print( d.toordinal() )
print( d.weekday() )
#735295
#0 -> It means monday.

d = datetime.date.today()
print( d.isoformat() )
print( d.ctime() )
#2014-03-03
#Mon Mar  3 00:00:00 2014

from datetime import time
print( time(7) )
#07:00:00
print( time(8, 14, 20, 3000 ) )
#08:14:20.003000

print( time(hour=3, second=3) )
#03:00:03

print("-----")

from datetime import datetime, date, time
print( datetime.now() )
print( datetime.today() )
print( datetime.utcnow() )
print( datetime.fromtimestamp(1234567890))
print( datetime.utcfromtimestamp(1234567890))
print( datetime.fromordinal(732421))
d = date(2009, 3, 10)
t = time(12, 23, 53)
print( datetime.combine(d, t) )
#014-03-03 23:22:08.580259
#2014-03-03 23:22:08.580277
#2014-03-03 14:22:08.580292
#2009-02-14 08:31:30
#2009-02-13 23:31:30
#2006-04-20 00:00:00
#2009-03-10 12:23:53

print("----")

from datetime import datetime
dt = datetime.now()
print( dt.date() )
print( dt.time() )
print( dt.replace(hour=20, second=30 ) )
print( dt.timetuple() )
#2014-03-03
#23:25:15.304432
#2014-03-03 20:25:30.304432
#time.struct_time(tm_year=2014, tm_mon=3, tm_mday=3, tm_hour=23, tm_min=25, tm_sec=15, tm_wday=0, tm_yday=62, tm_isdst=-1)


print("----")
dt = datetime.now()
print( dt.weekday() )
print( dt.isoweekday() )
#0
#1

print(dt.isoweekday())
print(dt.ctime())
print( str(dt) )
#1
#Mon Mar  3 23:27:26 2014
#2014-03-03 23:27:26.117400

print(" timedelta class ");
from datetime import timedelta
print( timedelta(days=-3 ) )
print( timedelta( hours=7) )
#-3 days, 0:00:00
#7:00:00

print( timedelta(weeks=2, days=3, hours=-3, minutes=30) )
print( timedelta(minutes=3, milliseconds=-20, microseconds=400))
#16 days, 21:30:00
#0:02:59.980400

print("---")

from datetime import timedelta

td_1 = timedelta(hours = 7 )
td_2 = timedelta(days=-3)
print( td_1 + td_2 )
#-3 days, 7:00:00

print( td_1-td_2, td_1+td_2, td_1*4, td_1//3, abs(td_2))
#3 days, 7:00:00 -3 days, 7:00:00 1 day, 4:00:00 2:20:00 3 days, 0:00:00

td_1 = timedelta(hours = 7 )
td_2 = timedelta(days=-3)
print( td_1 > td_2 )
print( td_1 < td_2 )
#True
#False

td_1 = timedelta(hours=24)
td_2 = timedelta(seconds=86400)
print( td_1 == td_2 )
#True