Land Storage Assignment

Running

You can run this application either directly from Python, using something like:

$ python3 -m src

..optionally passing in arguments to control the input starting balance CSVs and movement data (see python3 -m src --help for more details)

Alternatively, you can run this through docker:

$ docker build --target application_image -t storage_app .
$ docker run -v $(pwd)/data:/data storage_app

Tests can be run from the command line:

$ python3 -m unittest

...or from docker:

$ docker build --target test_image -t storage_app_tests .
$ docker run storage_app_tests

Some other things I'd look at given more time:

Dates and times are current naive - they should be timezone-aware
The program doesn't currently do anything to handle likely data errors (eg ships claiming to offload more than the port can receive)
More test cases for more edge cases.
I've assumed the movement data is complete and that we won't need to inspect the port levels mid-way through processing a movement file. This allows me to stream the movement file without sorting rows.
pyproject config (or the like), CI/CD with linting, etc