Usage

Command Line Interface

DateDelta is a command line tool which accepts two date string arguments. The program will compute the number of days between the two dates provided, print the result, and exit.

The date strings must be provided in isoformat, specifically in the form YYYY-MM-DD.

usage: datedelta [-h] [-i] [date_strings ...]

positional arguments:
  date_strings

optional arguments:
  -h, --help         show this help message and exit
  -i, --interactive

For example:

$ datedelta 2012-01-10 2012-01-11
0

$ datedelta 2021-12-01 2017-12-14
1447

Interactive Mode

DateDelta can be started in interactive mode using the -i flag.

In interactive mode, pairs of dates can be provided on the same line and the difference will be displayed. Type exit to close the interactive session.

For example:

$ datedelta -i                                                     py hai
2012-01-10 2012-01-11
0
2021-12-01 2017-12-14
1447
exit

Incomplete or malformed input during interactive mode will result in an error message and the program will exit.

Python Package

DateDelta can be used as a Python package. At the core of DateDelta is the Date class.

from datedelta import Date

Date classes can be initialized directly in the same way as Python’s built-in datetime.date class.

Date(2012, 1, 10) - Date(2012, 1, 11)  # => 0
Date(2021, 12, 1) - Date(2017, 12, 14)  # => 1447

For more details, the API can be found here.