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Python Programming Essentials - M23 - datetime module
The document is about Python's datetime module. It introduces the module and the key classes it contains for manipulating dates and times, including Date, Time, and DateTime objects. It shows how to create datetime objects from these classes, extract attributes like year and hour, and perform operations like adding or subtracting days to manipulate dates. Examples are provided demonstrating common datetime tasks in Python like printing dates in different formats, finding today's date, and comparing datetime objects.
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Introduction to Skillbrew and Pavan Verma, founder of P3 InfoTech. Focus on Python Programming Essentials.
Introduction to the datetime module, which includes key classes such as Date, Time, Datetime, Timedelta, and tzinfo.
Difference between naive objects (no timezone awareness) and aware objects (knowledge of time zones).
Note that all examples use naive objects.
Example demonstrating date object creation with output for year, month, day, and formatted date.
Example of creating a date object for today's date.
Example demonstrating time object creation with output for hour, minute, second, and formatted time.
Example of creating datetime objects with output for hour, minute, second, and formatted datetime.
Example of formatting and outputting a datetime object.
Example of adding 5 days to a datetime object and displaying the result.
Example of subtracting days to find a past date from a datetime object.
Example showing comparison of two datetime objects.
Example demonstrating subtraction of two datetime objects and outputting the time difference.
Recap of key topics covered: introduction to datetime module, types of datetime objects, and manipulation.
Links to additional resources for further reading on datetime objects in Python.
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Python Programming Essentials - M23 - datetime module
- 1. http://www.skillbrew.com /SkillbrewTalent brewed bythe industry itself Datetime module Pavan Verma @YinYangPavan 1 Founder, P3 InfoTech Solutions Pvt. Ltd. Python Programming Essentials
- 2. © SkillBrew http://skillbrew.com Introductionto datetime module 2 The datetime module supplies classes for manipulating dates and times Key classes in datetime module Date Time Datetime Timedelta tzinfo
- 3. © SkillBrew http://skillbrew.com Typesof datetime objects Date and Time objects Naive objects Aware objects 3 Naive objects are not aware of time zones and day-light savings but they are pretty easy to understand An aware object has sufficient knowledge of time zones and day-light savings
- 4. © SkillBrew http://skillbrew.com Note 4 Allexamples in these slides are using naive objects
- 5. © SkillBrew http://skillbrew.com Dateobjects 5 from datetime import date d = date(2013, 8, 22) print(d.year) print(d.month) print(d.day) print(d.strftime("%Y %m %d")) Output: 2013 8 22 2013 08 22
- 6. © SkillBrew http://skillbrew.com Dateobjects (2) 6 >>> from datetime import date >>> date.today() datetime.date(2013, 10, 21)
- 7. © SkillBrew http://skillbrew.com Timeobjects 7 from datetime import time t = time(2, 30, 45) print(t.hour) print(t.minute) print(t.second) print(t.strftime("%H:%M:%S")) Output: 2 30 45 02:30:45
- 8. © SkillBrew http://skillbrew.com DateTimeobjects 8 from datetime import datetime dt = datetime(2013, 8, 21, 2, 30, 45) print(dt.hour) print(dt.minute) print(dt.second) print(dt.strftime("%m-%d-%Y %H:%M:%S")) Output: 2 30 45 08-21-2013 02:30:45
- 9. © SkillBrew http://skillbrew.com Manipulatingdates 9 from datetime import datetime, timedelta dt = datetime(2013, 8, 21, 2, 30, 45) print(dt.strftime("%m-%d-%Y %H:%M:%S")) Output: 08-21-2013 02:30:45
- 10. © SkillBrew http://skillbrew.com Manipulatingdates (2) 10 from datetime import datetime, timedelta dt = datetime(2013, 8, 21, 2, 30, 45) # get datetime after 5 days add_dt = dt + timedelta(days=5) print(add_dt.strftime("%m-%d-%Y %H:%M:%S")) Output: 08-26-2013 02:30:45
- 11. © SkillBrew http://skillbrew.com Manipulatingdates (3) 11 from datetime import datetime, timedelta dt = datetime(2013, 8, 21, 2, 30, 45) # get datetime after 5 days add_dt = dt + timedelta(days=5) # get datetime 2 days in past sub_dt = dt - timedelta(days=2) print(sub_dt.strftime("%m-%d-%Y %H:%M:%S")) Output: 08-19-2013 02:30:45
- 12. © SkillBrew http://skillbrew.com Manipulatingdates (4) 12 from datetime import datetime, timedelta dt = datetime(2013, 8, 21, 2, 30, 45) # get datetime after 5 days add_dt = dt + timedelta(days=5) # get datetime 2 days in past sub_dt = dt - timedelta(days=2) # comparison print add_dt > sub_dt Output: True
- 13. © SkillBrew http://skillbrew.com Manipulatingdates (5) 13 from datetime import datetime, timedelta dt = datetime(2013, 8, 21, 2, 30, 45) # get datetime after 5 days add_dt = dt + timedelta(days=5) # get datetime 2 days in past sub_dt = dt - timedelta(days=2) # comparison add_dt > sub_dt # subtract print add_dt - sub_dt Output: 7 days, 0:00:00
- 14. © SkillBrew http://skillbrew.com Summary Introduction to datetime module Types of datetime objects Date objects Time objects Datetime objects Manipulating Dates 14
- 15. © SkillBrew http://skillbrew.com Resources Datetime objects blog post http://buddylindsey.com/python-date-and-datetime- objects-getting-to-know-them/ http://docs.python.org/2/library/datetime.html 15