"""Reconcile an AMEX CSV statement against the books and print differences.

Run like this:

$ python3 -m pip install thefuzz

$ python3 conservancy_beancount/reconcile/prototype_amex_reconciler.py \

  --beancount-file=$HOME/conservancy/beancount/books/2021.beancount \

  --csv-statement=$HOME/conservancy/confidential/2021-09-10_AMEX_activity.csv \

Conservancy currently enter data by hand rather than using Beancount importers.

This tool is still somewhat like an importer in that it needs to extract

transaction details from a third-party statement. Instead of creating

directives, it just checks to see that similar directives are already present.

Problems this attempts to address:

 - errors in the books take hours to find during reconciliation ("you're entering a world of pain")

 - adding statement/reconciliation metadata to books is manual and prone to mistakes

 - paper checks are entered in the books when written, but may not be cashed until months later (reconcile errors)

 - balance checks are manually updated in svn/Financial/Ledger/sanity-check-balances.yaml

 - creating reconciliation reports