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Please enable JavaScript in your browser settings or update your browser.Arithmetic Operations with timedelta Objects | Working with Dates
Dealing with Dates and Times in Python
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Course Content

Dealing with Dates and Times in Python

Dealing with Dates and Times in Python

1. Working with Dates
What Day is it Today?Creating a Date ObjectDate AttributesDate MethodsDate FormatsOne More FormattingDate DifferenceArithmetic Operations with timedelta Objects
2. Working with Times
What Time is it Now?Creating a datetime ObjectDatetime AttributesDatetime MethodsDatetime Formats12-Hour and 24-Hour FormatsDate and Time DifferenceReading Date and Time from String
3. Timezones and Daylight Savings Time (DST)
The Variery of TimezonesTimezone ExamplesApplying Timezone to Datetime ObjectWhat Time is it in ... ?Daylight Savings Time
4. Working with Dates and Times in pandas
Challenge: What Will We Work With?Challenge: Converting Columns into datetime TypeChallenge: Extreme Trips DurationsChallenge: InvestigationChallenge: Negative Trip DurationChallenge: Is this Common Issue?Challenge: Fixing the IssuesChallenge: Average Metrics Across Taxi TypesChallenge: Corrected Metrics Across Taxi TypesChallenge: Group by Period?

bookArithmetic Operations with timedelta Objects

We can perform different arithmetic operations for multiple timedelta objects. For example, we can add, subtract, divide, find the whole part of division... What's the sense?

For example, we can calculate the whole number of weeks between two dates. Let's use the same example as before: we can calculate the whole number of weeks since the COVID-19 became a pandemic (declared by WHO). There are two ways to solve this task:

  1. Extract the number of days (by using .days) and then find the whole part of division by 7.
  2. Find the whole part of the division of two timedelta objects.

              
12345678910111213141516

            
# Load classes from library
from datetime import date
from datetime import timedelta

# Create two date objects
pandemic = date(2020, 3, 11)
today = date.today()

# Calculate difference between dates
diff = today - pandemic

# Count whole number of weeks: method 1
print(diff.days//7, "weeks passed since COVID-19 became pandemic")

# Count whole number of weeks: method 2
print(diff//timedelta(weeks = 1), "weeks passed since COVID-19 became pandemic")
copy

See: in the first method, we extracted the number of days and calculated the whole part of the division by 7. In the second method, we divided by timedelta object with 1 week as an argument.

Task

For the same two date objects as before (date1 and date2 with dates "14 January 2016" and "07 April 2019" respectively) calculate the whole number of weeks between these dates (the initial difference is saved in date_diff). Use both methods described in the example.

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Section 1. Chapter 8
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bookArithmetic Operations with timedelta Objects

We can perform different arithmetic operations for multiple timedelta objects. For example, we can add, subtract, divide, find the whole part of division... What's the sense?

For example, we can calculate the whole number of weeks between two dates. Let's use the same example as before: we can calculate the whole number of weeks since the COVID-19 became a pandemic (declared by WHO). There are two ways to solve this task:

  1. Extract the number of days (by using .days) and then find the whole part of division by 7.
  2. Find the whole part of the division of two timedelta objects.

              
12345678910111213141516

            
# Load classes from library
from datetime import date
from datetime import timedelta

# Create two date objects
pandemic = date(2020, 3, 11)
today = date.today()

# Calculate difference between dates
diff = today - pandemic

# Count whole number of weeks: method 1
print(diff.days//7, "weeks passed since COVID-19 became pandemic")

# Count whole number of weeks: method 2
print(diff//timedelta(weeks = 1), "weeks passed since COVID-19 became pandemic")
copy

See: in the first method, we extracted the number of days and calculated the whole part of the division by 7. In the second method, we divided by timedelta object with 1 week as an argument.

Task

For the same two date objects as before (date1 and date2 with dates "14 January 2016" and "07 April 2019" respectively) calculate the whole number of weeks between these dates (the initial difference is saved in date_diff). Use both methods described in the example.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 8
toggle bottom row

bookArithmetic Operations with timedelta Objects

We can perform different arithmetic operations for multiple timedelta objects. For example, we can add, subtract, divide, find the whole part of division... What's the sense?

For example, we can calculate the whole number of weeks between two dates. Let's use the same example as before: we can calculate the whole number of weeks since the COVID-19 became a pandemic (declared by WHO). There are two ways to solve this task:

  1. Extract the number of days (by using .days) and then find the whole part of division by 7.
  2. Find the whole part of the division of two timedelta objects.

              
12345678910111213141516

            
# Load classes from library
from datetime import date
from datetime import timedelta

# Create two date objects
pandemic = date(2020, 3, 11)
today = date.today()

# Calculate difference between dates
diff = today - pandemic

# Count whole number of weeks: method 1
print(diff.days//7, "weeks passed since COVID-19 became pandemic")

# Count whole number of weeks: method 2
print(diff//timedelta(weeks = 1), "weeks passed since COVID-19 became pandemic")
copy

See: in the first method, we extracted the number of days and calculated the whole part of the division by 7. In the second method, we divided by timedelta object with 1 week as an argument.

Task

For the same two date objects as before (date1 and date2 with dates "14 January 2016" and "07 April 2019" respectively) calculate the whole number of weeks between these dates (the initial difference is saved in date_diff). Use both methods described in the example.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

We can perform different arithmetic operations for multiple timedelta objects. For example, we can add, subtract, divide, find the whole part of division... What's the sense?

For example, we can calculate the whole number of weeks between two dates. Let's use the same example as before: we can calculate the whole number of weeks since the COVID-19 became a pandemic (declared by WHO). There are two ways to solve this task:

  1. Extract the number of days (by using .days) and then find the whole part of division by 7.
  2. Find the whole part of the division of two timedelta objects.

              
12345678910111213141516

            
# Load classes from library
from datetime import date
from datetime import timedelta

# Create two date objects
pandemic = date(2020, 3, 11)
today = date.today()

# Calculate difference between dates
diff = today - pandemic

# Count whole number of weeks: method 1
print(diff.days//7, "weeks passed since COVID-19 became pandemic")

# Count whole number of weeks: method 2
print(diff//timedelta(weeks = 1), "weeks passed since COVID-19 became pandemic")
copy

See: in the first method, we extracted the number of days and calculated the whole part of the division by 7. In the second method, we divided by timedelta object with 1 week as an argument.

Task

For the same two date objects as before (date1 and date2 with dates "14 January 2016" and "07 April 2019" respectively) calculate the whole number of weeks between these dates (the initial difference is saved in date_diff). Use both methods described in the example.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 1. Chapter 8
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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