Python3 a reference to the time module

Time Module

In Python, there are usually three ways to represent time: timestamp, tuple (struct_time), formatted time string:

(1) timestamp (timestamp): Typically, a timestamp represents an offset that is calculated in seconds, starting January 1, 1970 00:00:00. We run "type (Time.time ())" and return the float type.

(2) formatted time string (format string): ' 1999-12-06 '

%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 zone%% %number itself python in the time date format symbol:

　　(3) tuple (struct_time): Struct_time A total of 9 elements total nine elements: (year, month, day, time, minute, second, week of the year, Day of the year, etc.)

indexing (Index)	Properties (Attribute)	value (values)
0	Tm_year (year)	Like 2011.
1	Tm_mon (month)	1-12
2	Tm_mday (Sun)	1-31
3	Tm_hour (Time)	0-23
4	Tm_min (min)	0-59
5	Tm_sec (SEC)	0-60
6	Tm_wday (Weekday)	0-6 (0 = Monday)
7	Tm_yday (day ordinal of the year)	1-366
8	TM_ISDST (whether it is daylight saving time)	Default is 0

1.time time Stamp

# 1 time () timestamp Import  Time Print (Time.time ()) " " results: 1515580697.744986 " "

2.strftime Time string

# 2 strftune Time string Print (Time.strftime ('%y-%m-%d')) " " results: 2018-01-10 " " Print (Time.strftime ('%y-%m-%d%h:%m:%s')) " " 2018-01-10 18:59:03 " "

3.localtime Time Tuple

# 3 localtime Time tuple Print (Time.localtime ()) " " results: Time.struct_time (tm_year=2018, Tm_mon=1, tm_mday=10, tm_hour=19, tm_min=28, tm_sec=10, tm_wday=2, tm_yday=10, tm_isdst=0)" "

4. Conversions between several formats

(1) time stamp, structured time

#(1) time stamp, structured time#time.gmtime () #UTC时间, consistent with local time in London, UK#time.localtime () #当地时间Print(Time.gmtime (1500000000))" "results: Time.struct_time (tm_year=2017, tm_mon=7, tm_mday=14, tm_hour=2, tm_min=40, tm_sec=0, tm_wday=4, tm_yday=195, TM _isdst=0)" "Print(Time.localtime (1500000000))" "time.struct_time (tm_year=2017, tm_mon=7, tm_mday=14, tm_hour=10, tm_min=40, tm_sec=0, tm_wday=4, tm_yday=195, tm_ isdst=0)" "#two time comparison find local time 8 hours faster than UTC time

(2) time stamp with structured time

# (2) structured time , timestamp time_tuple = Time.localtime (1500000000)print(Time.mktime (time_tuple)) The  #mktime function receives the Struct_time object as a parameter, returning a floating-point number that represents the time in seconds.  " Result: 1500000000.0 "

(3) Structured time-string time

# (3) Structured time-string time Print (Time.strftime ('%y-%m-%d', Time.localtime (Time.time () ))) " " results: 2018-01-10 " "

(4) String time-structured time

# (4) String time-structured time # Time.strptime (Time string, string corresponding format) Print (Time.strptime ("2017-03-16","%y-%m-%d")) " " results: Time.struct_time (tm_year=2017, tm_mon=3, tm_mday=16, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=75, tm_ Isdst=-1)" "

(5)%a%b%d%h:%m:%s%y string, structured time

# (5)%a%b%d%h:%m:%s%y string, structured time # Time.asctime (structured time) if the parameter is not passed, the format string of the current time is returned directly Print (Time.asctime (Time.localtime (1500000000))) " " results: Fri Jul 10:40:00 " " Print (Time.asctime ()) " " results: Wed Jan 19:59:16 2018 " "

(6)%a%d%d%h:%m:%s%y string--structured time

# time.ctime (timestamp)  If the parameter is not passed, the format string print(Time.ctime ())" result of the current time is returned directly : Wed Jan 20:01:41 2018'print(time.ctime (1500000000)) ' results: Fri Jul 10:40:00 "

Python3 a reference to the time module