Python Basics-Day 5 learning note-Standard library of modules: DateTime (2)

Introduced

The Datetime module is the re-encapsulation of the time module, providing more interfaces. The main is the date and time of parsing, formatting and operation.

Other time-related modules:

Time-basic

Calendar-basic

Pytz-About time zones

Dateutil-extension of datetime

Common Operation Times Class

ImportDatetimet= Datetime.time (+/-)#01:02:03Print(t)#syntax: Datetime.time (HOUR,MIN,SEC)Print("Hour:", T.hour)#hour:1Print('minute:', T.minute)#Minute:2Print('Second:', T.second)Print('microsecond:', T.microsecond)Print('Tzinfo:', T.tzinfo)#Time Zone InfoPrint('earlist:', Datetime.time.min)#earlist:00:00:00Print('Latest:', Datetime.time.max)#latest:23:59:59.999999Print('Resolution:', datetime.time.resolution)#resolution:0:00:00.000001

Note that microsecond milliseconds cannot be expressed in float mode, only integers.

Dates class

The date class is primarily used to represent calendar date. The attributes include year, month, and day.

ImportDatetimetoday=Datetime.date.today ()Print(today)#2017-08-20Print('CTime:', Today.ctime ())#Ctime:sun 00:00:00Print('ordinal:', Today.toordinal ())#ordinal:736561Print("Year :", Today.year)#year:2017Print('Month:', Today.month)#Month:8Print('Day :', Today.day)#day:20Tuple_today=today.timetuple ()Print(Tuple_today)#time.struct_time (tm_year=2017, tm_mon=8, tm_mday=20, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=232, tm_ Isdst=-1)Print(tuple_today.tm_year)#extract the elements in the Struct_time

Timedeltas

Date arithmetic

Comparing values

Combining dates and times

Formatting and parsing

Time zones

Python Basics-Day 5 learning note-Standard library of modules: DateTime (2)