Timedelta:

The Timedelta() class:

- The timedelta() class is used to represent the difference between two datetime objects.

- The timedelta() class is also used to add or subtract days, hours, minutes, seconds, and microseconds in a datetime object. 

- The years and months are NOT changed by timedelta() class.

- In the below codes, the * (sign in import) means calling all classes of the datetime module at one time.

- In the below codes, we add one second by using the timedelta() class.

- In the below codes, we add one day and one second by using the timedelta() class.

The Negative timedelta() class:

- In the below codes, we subtract one week by using the negative value in the timedelta() class.

- In the below codes, we subtract one week by subtracting the timedelta and datetime variables in the print() function.