Python's built-in modules time and DateTime methods are explained in detail and used (in Python, in both temporal and datetime formats)

Methods for time built-in modules

1, Time () timestamp

Time (), floating point number float
Return the current time in seconds since the Epoch.
Fractions of a second may be present if the system clock provides them.

Import  Time Print (Time.time ()) C:\python35\python3.exe D:/pyproject/day21 module/Timemodule. PY1528517838.7509072

This timestamp is a number of seconds, starting from the wee hours of 1970, and how many seconds it's been.

It's 2018, minus 1970, it's 48,

48*365*24*60*60=1513728000

haha calculate the same as above, this is the time stamp, every second is not the same

Timestamps can be used to calculate the 2-time subtraction, that is, when I order the time is a timestamp, I pay a successful one time stamp, you can calculate how many seconds I have to pay the order

2, localtime (seconds=None) structured time-local time

Get a structured time

Convert seconds since the Epoch to a time tuple expressing local time.
When ' seconds ' isn't passed in, convert the current time instead

Import  Time Print (Time.localtime ()) C:\python35\python3.exe D:/pyproject/day21 module/Timemodule. Pytime.struct_time (tm_year =2018, tm_mon=6, tm_mday=9, tm_hour=12, tm_min=36, tm_sec=7, tm_wday=5, tm_yday=160, tm_isdst=0)

Then we can take it out. Specific years or seconds, the day of the week, the day ordinal of a year

Import Timea=time.localtime ()print(A.tm_year,a.tm_mon,a.tm_mday,a.tm_hour,":  ", A.tm_min,":", A.tm_sec) C:\python35\python3.exe D:/ Pyproject/day21 module/Timemodule. PY2018 6 9 12:46:1

3, Gmtime is also a structured time of the world standardization time-UTC

Time Standard Time, 8 hours with our difference

4, Mktime (p_tuple)

Mktime (tuple), floating point number

Convert structured time to timestamp

Import  Time Print (Time.mktime (Time.localtime ())) C:\python35\python3.exe D:/pyproject/day21 module/Timemodule. PY 1528522939.0

5, strftime (format, p_tuple=None)

Convert structured time to string time

%Y year with century as a decimal number.%m Month as a decimal number [01,12].%d day of the month as a decimal number [01,31].%H Hour (24-hour clock) as a decimal number [00,23].%M Minute as a decimal number [00,59].%s Second as a decimal number [00,61].%z Time zone offset fromUTC.%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.%I Hour (12-hour clock) as a decimal number [01,12].%p Locale's equivalent of either AM or PM.

%x on behalf of time and seconds

Import  Time Print (Time.strftime ("%y-%m-%d%x", Time.localtime ())) C:\python35\python3.exe D:/ Pyproject/day21 module/Timemodule. PY2018-06-09 15:11:04

6, Strptime (string, format)

Convert string time to structured time

%Y year with century as a decimal number.%m Month as a decimal number [01,12].%d day of the month as a decimal number [01,31].%H Hour (24-hour clock) as a decimal number [00,23].%M Minute as a decimal number [00,59].%s Second as a decimal number [00,61].%z Time zone offset fromUTC.%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.%I Hour (12-hour clock) as a decimal number [01,12].%p Locale's equivalent of either AM or PM.

The string time here corresponds to the structure time one by one behind it.

Import  Time Print (Time.strptime ("2018:06:09-15:21:36","%y:%m:%d-%x")) C:\python35\python3.exe D:/pyproject/day21 module/Timemodule. Pytime.struct_time (tm_year=2018, Tm_mon=6, TM _mday=9, tm_hour=15, tm_min=21, tm_sec=36, tm_wday=5, tm_yday=160, Tm_isdst=-1)

7, Asctime (p_tuple=None) can be added to the structure of parameters, no parameter default is the current time

If you don't have a custom demand time format, you can use this method

Convert a time tuple to a string, e.g. ' Sat June 06 16:26:11 1998 '.
When the time of a tuple is not present, current time as returned by LocalTime ()
is used

Import  Time Print (Time.asctime ()) C:\python35\python3.exe D:/pyproject/day21 module/Timemodule. Pysat June  9 15:26:45 2018

8, CTime (seconds=None) can be added timestamp parameter, no parameter default is the current time

It's the same format as the 7 asctime.

Print (Time.ctime ()) # without arguments, the default is the current time Sat June   9 15:34:30 2018Print(Time.ctime (1228629586.2798274))# plus timestamp (string time) parameter Sun Dec   7 13:59:46 2008

9, DateTime This relatively easy to use, the first usage is relatively fine, the second format is more beautiful

Import datetime Print (Datetime.datetime.now ()) Print (Datetime.datetime.now (). Strftime ("%y-%m-%d%x")) C:\python35\python3.exe D:/ Pyproject/day21 module/Timemodule. py2018-06-09 15:44:29.8709262018-06-09 15:44:29

Python's built-in modules time and DateTime methods are explained in detail and used (in Python, in both temporal and datetime formats)