The time module of the Python module

Import time

#从1970年1月1号凌晨开始到现在的秒数 because the first commercial version of UNIX was listed this year, the most common
# Print (Time.time ())

# 1491574950.2398355


#返回当前的系统时间, you can add parameters, such as the second example below
# Print (Time.ctime ())
# Print (Time.ctime (Time.time ()-86400))

# Fri APR 7 22:24:17 2017
# Thu APR 6 22:25:15 2017



#可以把年, month, day, hour and minute are displayed separately, but the time shown here is GMT, and the second example below can be used to make time string concatenation
# Print (Time.gmtime ())
# time_obj = Time.gmtime ()
# Print (Time_obj.tm_year,time_obj.tm_mon)

# Time.struct_time (tm_year=2017, tm_mon=4, tm_mday=7, tm_hour=14, tm_min=25, tm_sec=59, tm_wday=4, tm_yday=97, TM_ISDST =0)
# 2017 4


#上面显示的格林威治时间, here is the local time shown below
# Print (Time.localtime ())

# Time.struct_time (tm_year=2017, tm_mon=4, tm_mday=7, tm_hour=22, tm_min=31, tm_sec=42, tm_wday=4, tm_yday=97, TM_ISDST =0)


#把一个时间对象转换成时间戳

# Print (Time.mktime (time_obj))
# 1491546920.0


#等待10s
# Time.sleep (10)
# print (' Wait 10s ')


#将时间对象转换成指定的字符串格式, there are two parameters, the format and the time object, you can choose the time format you want, such as the need for the date, or the time, or to

# Print (Time.strftime ("%y-%m-%d:%h:%m:%s", Time.gmtime ()))
# 2017-04-07:14:40:28

# Print (Time.strftime ("%y-%m-%d:%h:%m:%s", Time.localtime ()))
# 2017-04-07:22:40:50


# ret = time.strptime (' 2016-12-23 15:34:34 ', '%y-%m-%d%h:%m:%s ')
# Print (ret)

# Time.struct_time (tm_year=2016, tm_mon=12, tm_mday=23, tm_hour=15, tm_min=34, tm_sec=34, tm_wday=4, tm_yday=358, tm_ ISDST=-1)


Import datetime

#显示今天的日期
# Print (Datetime.date.today ())
# 2017-04-07


# ret = Datetime.datetime.now ()
# Print (ret)

# 2017-04-07 22:48:18.861383

#转换time的形式
# Print (Ret.timetuple ())

# Time.struct_time (tm_year=2017, tm_mon=4, tm_mday=7, tm_hour=22, tm_min=49, tm_sec=46, tm_wday=4, tm_yday=97, TM_ISDST =-1)

#下面介绍下时间的加减

#给当前的时间加10天
# Print (Datetime.datetime.now () + Datetime.timedelta (days=10))
# 2017-04-17 22:55:03.070503


#给当前时间减10天
# Print (Datetime.datetime.now () + Datetime.timedelta (days=-10))
# Print (Datetime.datetime.now ()-Datetime.timedelta (days=10))

# 2017-03-28 22:56:08.529247
# 2017-03-28 22:56:08.529247

#上面的例子是加减天, in fact Timedelta can support the addition and subtraction of the following parameters, such as weeks, hours, minutes
# days=0, Seconds=0, Microseconds=0,milliseconds=0, Minutes=0, Hours=0, weeks=0):


#
Current_time = Datetime.datetime.now ()
Print (Current_time)

#替换为某年, one month, one day
Print (Current_time.replace (2016,1,3))
Print (Current_time.replace (2016,3))
Print (Current_time.replace (2015))

# 2016-01-03 23:01:54.095012
# 2016-03-07 23:01:54.095012
# 2015-04-07 23:01:54.095012



#两个时间还可以做比较
# gtime = Datetime.datetime.now ()
# CTime = Gtime.replace (2015)
# if Gtime > CTime:
# print (' true ')
# Else:
# print (' false ')

The time module of the Python module