zz Python datetime / time conversions

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Python datetime / time conversions

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)

#-------------------------------------------------
# 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

zz Python datetime / time conversions

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原文地址：http://www.cnblogs.com/yeyong/p/4962965.html