Common datetime time processing methods in Python

Common datetime time processing methods in Python

Python provides multiple built-in modules for date and time operations, such as calendar, time, and datetime. Today, we will mainly discuss how to use datetime. If you need it, you can refer to it.

 

 

Common time conversion and processing functions:

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Import datetime # Obtain the current time D1 = datetime. datetime. now () Print d1 # The current time plus half an hour D2 = d1 + datetime. timedelta (hours = 0.5) Print d2 # Formatting string output D3 = d2.strftime ('% Y-% m-% d % H: % M: % s ') Print d3 # Convert a string to a time type D4 = datetime. datetime. strptime (date, '% Y-% m-% d % H: % M: % S. % F ') Print d4

Obtain the date of this week and the first day of this month:

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#-*-Coding: UTF-8 -*- Import datetime Def first_day_of_month (): ''' Obtain the first day of this month : Return: ''' # Now_date = datetime. datetime. now () # Return (now_date + datetime. timedelta (days =-now_date.day + 1). replace (hour = 0, minute = 0, second = 0, # Microsecond = 0) Return datetime. date. today ()-datetime. timedelta (days = datetime. datetime. now (). day-1) Def first_day_of_week (): ''' Obtain the first day of the week : Return: ''' Return datetime. date. today ()-datetime. timedelta (days = datetime. date. today (). weekday ()) If _ name _ = "_ main __": This_week = first_day_of_week () Last_week = this_week-datetime. timedelta (days = 7) This_month = first_day_of_month () Last_month = this_month-datetime. timedelta (days = (this_month-datetime. timedelta (days = 1). day) Print this_week Print last_week Print this_month Print last_month

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#! /Usr/bin/python # Coding = UTF-8   Import datetime   """ Powerful functions of datetime Supported from 0001 to 9999 """   """ Current Time Returns a datetime type. The now method has a parameter tz to set the time zone type. If the effect is not the same as that of the today method """ Now = datetime. datetime. now () # UTC time Datetime. datetime. utcnow () Attrs = [ ("Year", "year"), ('month', "month'), (" day "," day "), ('hour", "hour "), ('minute ', "minute"), ('second', "second"), ('microsecond', "millisecond "),( 'Min', "min"), ('max ', "max "), ] For k, v in attrs: "Now. % s = % s # % s" % (k, getattr (now, k), v)     """ Returns a time structure. """ Now. timetuple ()   """ Returns a date type.   """ Now. date ()   """ Returns a time type.   """ Now. time ()   """ The current day of the week. Monday is 0, and the week is 6 Note that the method is not an attribute. """ Now. weekday ()   """ The current day of the week. Monday is 1, week is 7 Note that the method is not an attribute. """ Now. isoweekday ()   """ Modify the current time. For example, change it to the 1st day of the current month. """ Now. replace (day = 1)   Past = datetime. datetime (2010,11, 12,13, 14,15, 16)   """ Comparison The returned value is of the timedelta type.   """ Now-past """ Convert to string For detailed rules, see Time   """ Strdatetime = now. strftime ("% Y-% m-% d % H: % M: % S ") """ String generation datetime object """ Datetime. datetime. strptime (strdatetime, "% Y-% m-% d % H: % M: % S ")

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