Code Jam 6: Qualifier

My solution to the @python-discord Code Jam 6 qualifier.

Requirements

Here is the requirements to complete the qualifier. Advanced requirements were optionals, but I decided to try to complete them.

Basic Requirements

Must return an instance of datetime.datetime that is equivalent to the given ISO-8601 timestamp
Must be able to parse date strings in the format YYYY-MM-DD
Must also be able to parse combined datetime strings in the format <date>T<time>, where <time> can be one of:
- hh:mm:ss (e.g. 2017-05-05T12:00:00)
- hh:mm (e.g. 2017-05-05T12:00)
- hh (e.g. 2017-05-05T12)
If given invalid input, raise a ValueError explaining what went wrong.

Advanced Requirements (optional, for extra points)

Support the truncated date format YYYYMMDD
Support fractional seconds hh:mm:ss.sss
Support the truncated time formats hhmmss.ssss, hhmmss, hhmm
Support time zones
- Timestamps without a timezone are local time
- Timestamps with a timezone are relative to the UTC
  - Supported formats are Z, ±hh:mm, ±hhmm and ±hh

Run the test suite

I included a testsuite to make sure my solution was working correctly. In order to run it, you need to have pipenv installed an run

pipenv run test

Development environment

In order to ensure a good code quality for my submission, I added a precommit, a little script that run before every commit and make sure my code follow the quality standards. If my code fail it, the commit is aborted. In order to setup it, you need to have pipenv installed and run