|-|{"files":{"datetime_timestamp.py":{"env":"plain"}},"tag":"bigdata"}

datetime_timestamp.py

#coding:UTF-8
import time

dt = "2016-05-05 20:28:54"
#转换成时间数组
timeArray = time.strptime(dt, "%Y-%m-%d %H:%M:%S")
#转换成时间戳
timestamp = time.mktime(timeArray)

#转换成新的时间格式(20160505-20:28:54)
dt_new = time.strftime("%Y%m%d-%H:%M:%S",timeArray)


timestamp = 1462451334
#转换成localtime
time_local = time.localtime(timestamp)
#转换成新的时间格式(2016-05-05 20:28:54)
dt = time.strftime("%Y-%m-%d %H:%M:%S",time_local)

#获取当前时间
time_now = int(time.time())
#转换成localtime
time_local = time.localtime(time_now)
#转换成新的时间格式(2016-05-09 18:59:20)
dt = time.strftime("%Y-%m-%d %H:%M:%S",time_local)


#日期操作
#格式化日期与unixtimestamp的相互转换
>>> import datetime
>>> import time
>>> dt = datetime.datetime(2010, 2, 25, 23, 23)
>>> time.mktime(dt.timetuple())
>>> 

from datetime import datetime
import time

#-------------------------------------------------
# conversions to strings
#-------------------------------------------------
# datetime object to string
dt_obj = datetime(2008, 11, 10, 17, 53, 59)
date_str = dt_obj.strftime("%Y-%m-%d %H:%M:%S")
print date_str

# time tuple to string
time_tuple = (2008, 11, 12, 13, 51, 18, 2, 317, 0)
date_str = time.strftime("%Y-%m-%d %H:%M:%S", time_tuple)
print date_str

#-------------------------------------------------
# conversions to datetime objects
#-------------------------------------------------
# time tuple to datetime object
time_tuple = (2008, 11, 12, 13, 51, 18, 2, 317, 0)
dt_obj = datetime(*time_tuple[0:6])
print repr(dt_obj)

# date string to datetime object
date_str = "2008-11-10 17:53:59"
dt_obj = datetime.strptime(date_str, "%Y-%m-%d %H:%M:%S")
print repr(dt_obj)

# timestamp to datetime object in local time
timestamp = 1226527167.595983
dt_obj = datetime.fromtimestamp(timestamp)
print repr(dt_obj)

# timestamp to datetime object in UTC
timestamp = 1226527167.595983
dt_obj = datetime.utcfromtimestamp(timestamp)
print repr(dt_obj)

#-------------------------------------------------
# conversions to time tuples
#-------------------------------------------------
# datetime object to time tuple
dt_obj = datetime(2008, 11, 10, 17, 53, 59)
time_tuple = dt_obj.timetuple()
print repr(time_tuple)

# string to time tuple
date_str = "2008-11-10 17:53:59"
time_tuple = time.strptime(date_str, "%Y-%m-%d %H:%M:%S")
print repr(time_tuple)

# timestamp to time tuple in UTC
timestamp = 1226527167.595983
time_tuple = time.gmtime(timestamp)
print repr(time_tuple)

# timestamp to time tuple in local time
timestamp = 1226527167.595983
time_tuple = time.localtime(timestamp)
print repr(time_tuple)

#-------------------------------------------------
# conversions to timestamps
#-------------------------------------------------
# time tuple in local time to timestamp
time_tuple = (2008, 11, 12, 13, 59, 27, 2, 317, 0)
timestamp = time.mktime(time_tuple)
print repr(timestamp)

# time tuple in utc time to timestamp
time_tuple_utc = (2008, 11, 12, 13, 59, 27, 2, 317, 0)
timestamp_utc = calendar.timegm(time_tuple_utc)
print repr(timestamp_utc)

#-------------------------------------------------
# results
#-------------------------------------------------
# 2008-11-10 17:53:59
# 2008-11-12 13:51:18
# datetime.datetime(2008, 11, 12, 13, 51, 18)
# datetime.datetime(2008, 11, 10, 17, 53, 59)
# datetime.datetime(2008, 11, 12, 13, 59, 27, 595983)
# datetime.datetime(2008, 11, 12, 21, 59, 27, 595983)
# (2008, 11, 10, 17, 53, 59, 0, 315, -1)
# (2008, 11, 10, 17, 53, 59, 0, 315, -1)
# (2008, 11, 12, 21, 59, 27, 2, 317, 0)
# (2008, 11, 12, 13, 59, 27, 2, 317, 0)
# 1226527167.0
# 1226498367