Let’s say you need the current date and time from your system to place it in a Python application. For example to place the date and time as a timestamp in a blog application so the date and time when a blog article was posted will be visible on the screen.
For that, we need to import a module called
datetime which contains a class with the same name
>>> import datetime >>> current_datetime = datetime.datetime.now() >>> print(current_datetime) 2017-12-11 08:18:18.685000
There are many helper functions and attributes in the
datetime object that allow you to output the time, date, year, week, etc in whatever way is needed.
>>> import datetime >>> current_datetime = datetime.datetime.now() >>> print(current_datetime) 2017-12-11 08:38:39.574000 >>> >>> current_datetime.year 2017 >>> current_datetime.weekday() 0 >>> current_datetime.date() datetime.date(2017, 12, 11) >>> current_datetime.time() datetime.time(8, 38, 39, 574000) >>> current_datetime.day 11
There is another module named
calendar if you need more than time and date.
Definitely, you will want to generate a string representation of the
datetime object so it will be nicely displayed on the screen. For that we need to use the
import datetime >>> datetime_string = datetime.datetime.now() >>> datetime_string.strftime("%A, %Y %B %d, %I:%M %p") 'Monday, 2017 December 11, 08:51 AM'
If you want to find out what day is on a certain date in the future (or past) then you can read dates and time from a given string.
>>> birthday_2018 = datetime.datetime(year = 2018, month = 6, day = 16) >>> birthday_2018.weekday() 5
So, in 2018 my birthday is on Saturday! (Monday = 0, Tuesday = 1, … Saturday = 5).