Day27-datetime-module

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if len(learning.python) == 30:系列第 27 篇

2018鐵人賽 python3 datetime

j2hongming

2018-01-05 00:22:17

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time

關注時分秒

import time


# time stamp
print('time stamp: {}'.format(time.time()))
print('type of time: {}'.format(type(time.time())))

# time stamp: 1515080614.0703459
# type of time: <class 'float'>


# struct_time
print('local time: {}'.format(time.localtime()))
print('type of local time: {}'.format(type(time.localtime())))
print('gmt time: {}'.format(time.gmtime()))

# local time: time.struct_time(tm_year=2018, tm_mon=1, tm_mday=4, tm_hour=23, tm_min=43, tm_sec=34, tm_wday=3, tm_yday=4, tm_isdst=0)
# type of local time: <class 'time.struct_time'>
# gmt time: time.struct_time(tm_year=2018, tm_mon=1, tm_mday=4, tm_hour=15, tm_min=43, tm_sec=34, tm_wday=3, tm_yday=4, tm_isdst=0)
# type of gmt time: <class 'time.struct_time'>


# string
print('type of gmt time: {}'.format(type(time.gmtime())))
print(time.ctime(time.time()))
# custom string
print(time.strftime("%Y-%m-%d, %H:%M:%S, %w", time.gmtime()))

# Thu Jan  4 23:43:34 2018
# 2018-01-04, 15:43:34, 4

datetime

關注年月日時分秒

datetime可比大小，相減後得到timedelta物件

import datetime


datetime_now = datetime.datetime.now()
print('datetime_now: {}'.format(datetime_now))
print('type of datetime_now: {}'.format(type(datetime_now)))

# datetime_now: 2018-01-05 00:08:08.024173
# type of datetime_now: <class 'datetime.datetime'>


datetime_now_utc = datetime.datetime.utcnow()
print('datetime_now_utc: {}'.format(datetime_now_utc))
print('type of datetime_now_utc: {}'.format(type(datetime_now_utc)))

# datetime_now_utc: 2018-01-04 16:08:08.024224
# type of datetime_now_utc: <class 'datetime.datetime'>


today = datetime.date.today()
print('today: {}'.format(today))
print('type of today: {}'.format(type(today)))

# today: 2018-01-05
# type of today: <class 'datetime.date'>


if datetime_now > datetime_now_20180101:
    print('latest:{}'.format(datetime_now))
else:
    print('latest:{}'.format(datetime_now_20180101))

# latest:2018-01-05 00:19:23.513402


time_difference = datetime_now - datetime_now_20180101
print('time_difference: {}'.format(time_difference))
print('total seconds:{}'.format(time_difference.total_seconds()))
print('type of time_difference: {}'.format(type(time_difference)))

# time_difference: 4 days, 0:19:23.513402
# total seconds:346763.513402
# type of time_difference: <class 'datetime.timedelta'>