Time and datetime for Python

#python format symbols in time date%y Two-digit year representation (00-99)%Y Four-digit year representation (000-9999)%m Month (01-12)One day in%d months (0-31)%H 24-hour hours (0-23)%I 12-hour hours (01-12)%M minutes (00=59)%s seconds (00-59)%a local simplified week name%A Local Full week name%b Local simplified month name%B Local Full month name%c Local corresponding date representation and time representation%j Day of the Year (001-366)%p equivalent of local a.m. or P.M.%u days of the year (00-53) Sunday for the beginning of the week%w Week (0-6), Sunday for the beginning of the week%W number of weeks in the year (00-53) Monday for the beginning of the week%x Local corresponding date representation%X Local corresponding time representation%Z name of the current time zonePercent% of the number itself

 int tm_sec;          /* seconds – The value interval is [0,59] */ int tm_min;             /*-The range of values is [0,59] */ int tm_hour;         /* Time-value interval is [0,23] */ int tm_mday;      /* Date in one months-the value interval is [1,31] */ int tm_mon; /* Month (starting from January, 0 for January)-<span style= color : #cc0000;               " > value interval is [0,11]</span> */ int tm_year;             /* Year with a value starting from 1900 */ int tm_wday;             /* Week – The value interval is [0,6], where 0 represents Sunday, 1 for Monday, and so on */ int tm_yday;            /* days from January 1 of each year – the value interval is [0,365], where 0 represents January 1, 1 for January 2, and so on */ int tm_isdst; The /* Daylight saving time identifier, TM_ISDST is positive when daylight savings is applied. Without daylight saving time, TM_ISDST is 0; When you are not aware of the situation, 

In a computer, time is actually represented by a number. We call the time of the January 1, 1970 00:00:00 utc+00:00 time zone The epoch time, which is recorded as 0 (the time before 1970 is timestamp negative), and the current is the number of seconds relative to the epoch. Called timestamp.

1 Import Time2 3>>>Print(Time.time ())41509073491.4012895 6 #time.localtime (secs)7>>>Print('localtime', Time.localtime (1509066702.2862496))#accepts the specified timestamp and returns the corresponding local time-date tuple8LocalTime time.struct_time (tm_year=2017, tm_mon=10, tm_mday=27, tm_hour=9, tm_min=11, tm_sec=42, tm_wday=4, tm_yday= Tm_isdst=,0)9>>>Print('localtime', Time.localtime ())#returns a tuple of the local time date corresponding to the current timeTenLocalTime time.struct_time (tm_year=2017, tm_mon=10, tm_mday=27, tm_hour=11, tm_min=4, tm_sec=51, tm_wday=4, tm_yday= Tm_isdst=,0) One  A #time.mktime (tupletime) -t = (2017, 10, 27, 9, 3, 38, 1, 48, 0)#The time tuple must have nine parameters Tupletime (YEAR,MON,DAY,HOUR,MIN,SEC,WDAY,YDAY,ISDST) -secs = Time.mktime (t)#accepts a time tuple and returns a timestamp object the>>>Print('Timestamp:%f'%secs) -timestamp:1509066218.000000 -  -  + #Time.gmtime (timestamp) accepts a timestamp and returns a time tuple ->>>Print('gmtime:', Time.gmtime (1509066218.000000))#Specify the time stamp corresponding to the GMT tuple +Gmtime:time.struct_time (tm_year=2017, tm_mon=10, tm_mday=27, Tm_hour=1, tm_min=3, tm_sec=38, tm_wday=4, tm_yday=300, tm_isdst=0) A>>>Print('gmtime:', Time.gmtime (Time.time ()))#GMT tuple corresponding to the current timestamp atGmtime:time.struct_time (tm_year=2017, tm_mon=10, tm_mday=27, tm_hour=3, tm_min=4, tm_sec=51, tm_wday=4, tm_yday=300, tm_isdst=0) -  - #Time.asctime (Tupletime) accepts a time tuple, returning the format of the time after formatting -secs= 1509066218.000000 ->>>Print("asctime (localtime (secs)):%s"% Time.asctime (time.localtime (secs)))#Local format for local specified timestamp -Asctime (localtime (secs)): Fri Oct 27 09:03:38 2017 in  ->>>Print('asctime (gmtime (secs)):%s'% Time.asctime (time.gmtime (secs)))#returns the format of Greenwich time for a specified timestamp toAsctime (gmtime (secs)): Fri Oct 27 01:03:38 2017 +  ->>>Print('asctime:', Time.asctime ())#no parameter is the formatting of the current time theAsctime:fri OCT 27 11:04:51 2017 *  $ Panax Notoginseng #time.strptime (str,fmt= '%a%b%d%h:%m:%s%Y ') The format parameter specifies the time form ->>>Print('Tupletime:', Time.strptime ("Oct-Ten",'%d%b%y%H'))#resolves a given date to a time tuple the  + #Time.strftime (format,tupletime) accepts format format and a time tuple, and returns the formatting as a custom-defined A>>>Print('Now_time:', Time.strftime ("%y-%m-%d%h:%m:%s", Time.localtime ())) theNow_time:2017-10-27 11:04:51 +  - #time.ctime (secs) If a timestamp argument is given, returns the format after the specified timestamp is formatted. $>>>Print('time.ctime:%s'% Time.ctime (secs=1509066218.000000)) $Time.ctime:Fri OCT 27 09:03:38 2017 ->>>Print('time.ctime:%s'%time.ctime ()) -Time.ctime:Fri OCT 27 11:04:51 2017 the  - #time.sleep (secs) #当前线程推迟s秒执行WuyiTime.sleep (2)

DateTime module

Two methods:

1.import datetime

2.form datetime Import DateTime

The previous datetime represents a module, which is a class of a DateTime module, so datetime two methods

I used the second kind of more concise.

#The now () function is used to get the current time>>>Print('Nowtime:', DateTime.Now ()) Nowtime:2017-10-27 11:34:49.443648#You can also export the dates you specify in the format>>>Print('MyTime:', DateTime (1997, 11, 3, 13, 13, 13)) MyTime:1997-11-03 13:13:13#converts the specified time to a timestamp>>>Print('Mystamp:', DateTime (1997, one, 3, in.). Timestamp ())#the timestamp () function is called heremystamp:878533993.0#Convert a timestamp to a time>>>Print('MyTime:', Datetime.fromtimestamp (878533993.0)) MyTime:1997-11-03 13:13:13#strptime (date_string, format) is used to format the string, and the time module uses the same#strftime (self,format) output format subject to customization>>>Print(DateTime.Now (). Strftime ('%y-%m-%d'))2017-10-27

Time and datetime for Python