Python时间、时间戳相互转换

输入

#encoding=utf-8

from datetime import date, datetime
import time
# 已下时间都是当地时间，而不是UTC时间
# 获取当前时间
d1 = datetime.today()
d2 = date.today()
print("d1=%s, d2=%s" %(d1, d2))
# 格式化输出
print("d1=%s"%(d1.strftime("%Y-%m-%d")))
print("d2=%s"%(d2.strftime("%Y-%m")))

# 获取时间戳,时间戳格式都是一样的
t1 = datetime.timestamp(d1)
#t2 = date.timestamp(d2)，date没有转换时间戳函数
t3 = time.time()
print("t1=%f, t3=%f"%(t1,t3))

# 获得任意时间的时间戳
# TODO

# 时间戳转换为时间
D1 = datetime.fromtimestamp(t1)
D2 = date.fromtimestamp(t1)
print("D1=%s, D2=%s"%(D1, D2))

"""
strftime格式
%a Locale’s abbreviated weekday name. 
%A Locale’s full weekday name. 
%b Locale’s abbreviated month name. 
%B Locale’s full month name. 
%c Locale’s appropriate date and time representation. 
%d Day of the month as a decimal number [01,31]. 
%H Hour (24-hour clock) as a decimal number [00,23]. 
%I Hour (12-hour clock) as a decimal number [01,12]. 
%j Day of the year as a decimal number [001,366]. 
%m Month as a decimal number [01,12]. 
%M Minute as a decimal number [00,59]. 
%p Locale’s equivalent of either AM or PM. (1) 
%S Second as a decimal number [00,61]. (2) 
%U Week number of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday are considered to be in week 0. (3) 
%w Weekday as a decimal number [0(Sunday),6]. 
%W Week number of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday are considered to be in week 0. (3) 
%x Locale’s appropriate date representation. 
%X Locale’s appropriate time representation. 
%y Year without century as a decimal number [00,99]. 
%Y Year with century as a decimal number. 
%z Time zone offset indicating a positive or negative time difference from UTC/GMT of the form +HHMM or -HHMM, where H represents decimal hour digits and M represents decimal minute digits [-23:59, +23:59]. 
%Z Time zone name (no characters if no time zone exists). 
%% A literal '%' character. 
"""

输出

d1=2015-03-14 10:23:30.245054, d2=2015-03-14
d1=2015-03-14
d2=2015-03
t1=1426299810.245054, t3=1426299810.245055
D1=2015-03-14 10:23:30.245054, D2=2015-03-14