#Wei Liu #11/5/2021 #U3M1A1.3 #We are learning datetime.timedelta

from datetime import timedelta # Define a timedelta object delta1 = timedelta(days = 2, seconds = 0, minutes = 15, hours = 1, weeks = 4) print(delta1, " is stored in delta1") # Get the stored attributes d = delta1.days s = delta1.seconds ms = delta1.microseconds print("Days = ", d, "| Seconds = ", s, "| Microseconds = ", ms) # Get total number of seconds all_seconds = delta1.total_seconds() print("Total number of seconds = ", all_seconds)

from datetime import datetime, timedelta date1 = datetime(year = 2015, month = 1, day = 19) date2 = datetime.today() # Define a time delta delta2 = date2 - date1 print(delta2, " is stored in delta2") print("Total number of seconds = ", delta2.total_seconds())

# [ ] Create a `timedelta` object that contains: 2 hours, 3 minutes, and 1 week from datetime import timedelta deltaTask1=timedelta(weeks=1, hours=2, minutes=3) print(deltaTask1)

# [ ] Use a `timedelta` object to calculate the total number of seconds in: 1 hour and 15 minutes from datetime import timedelta delta1=timedelta(hours=1,minutes=15) all_seconds=delta1.total_seconds() print(all_seconds)

# Use a `timedelta` object to find out how many days are left until your upcoming birthday from datetime import datetime deltaCurrent = datetime.today() deltaBirthday = datetime(year = 2020, month = 6, day = 30) deltaDaysLeft = deltaBirthday - deltaCurrent print(deltaDaysLeft)

from datetime import datetime, timedelta # Define a timedelta object one_hundred_days = timedelta(days = 100) # Get today's date current_date = datetime.today() # Compute the new date new_date = current_date + one_hundred_days # Print formatted new date print("After 100 days:", new_date.strftime("%b/%d/%Y"))

from datetime import datetime, timedelta # Define the timedelta objects one_hundred_days = timedelta(days = 100) two_hundred_days = one_hundred_days * 2 three_hundred_days = one_hundred_days * 3 # Get today's date current_date = datetime.today() # Compute the new dates new_date1 = current_date + two_hundred_days new_date2 = current_date + three_hundred_days # Print formatted new dates print("After 200 days:", new_date1.strftime("%b/%d/%Y")) print("After 300 days:", new_date2.strftime("%b/%d/%Y"))

# [ ] Write a program to compute the date 3 weeks before your birthday # to help you remember when to send the invitations from datetime import datetime, timedelta threeWeeks=timedelta(weeks=3) birthdate=datetime(2021,8,6) invitationdate=birthdate-threeWeeks print("Date to send out invitions is:" ,invitationdate.strftime("%b/%d/%Y"))

# [ ] Write a program that computes the number of days from the current date till the 3 weeks reminder # 1) Create a `timedelta` object (td1) for the period between the current date and your upcoming birthday # 2) Create a `timedelta` object (td2) containing 3 weeks # 3) Use the `timedelta` objects (td) from 1 and 2 to compute the required number of days from datetime import datetime, timedelta cd=datetime.today() td1=datetime(2021,8,6)-cd td2=timedelta(weeks=3) td=td1-td2 days=td.days print("Number of days from today until my 3 weeks reminder:",days)

from datetime import date # Birthday of person 1 birthday1 = date(year = 1993, month = 3, day = 5) # Birthday of person 2 birthday2 = date(year = 2003, month = 3, day = 20) # Compare birthdays if (birthday1 > birthday2): print("Person 2 is older") elif (birthday1 < birthday2): print("Person 1 is older") else: print("Person 1 and Person 2 are of the same age")

# [ ] Write a program to find out if 4th of July of this year has passed or not from datetime import date currentDate = date.today() julyFourth=date(2020,7,4) if (julyFourth > currentDate): print("We still have time until the 4th of July") else: print("4th of July has passed.")

from datetime import datetime # Define today's date now = datetime.today() # December solstice of year 1, it can be any year, it will be changed later solstice = datetime(month = 12, day = 21, year = 1) # Change solstice's year to current year solstice = solstice.replace(year = (datetime.today().year)) # Get the timedelta count = solstice - now # Display the solstice countdown print("There are", count.days, "days until the December solstice!" )

# [ ] Complete the following program to find out if you are closer to the current year's June or December solstice # Define today's date now = datetime.today() # Define the December solstice december_solstice = datetime(month = 12, day = 21, year = now.year) # Define the June solstice june_solstice = datetime(month = 6, day = 21, year = now.year) # Find out which solstice is closer if (june_solstice<december_solstice): print("June Solstice is closer.") elif: print("December Solstice is closer.") else: print("W are December.")