ledger-pyreport is a lightweight Flask webapp for generating interactive and printable accounting reports from [ledger-cli](https://www.ledger-cli.org/) data.
## Reports
* Trial balance, and comparative trial balance
* Balance sheet, and comparative balance sheet
* Income statement, and comparative income statement
* General ledger
* Account transactions, with or without itemisation of commodities
* Transaction detail, with or without itemisation of commodities
* Simulates annual closing of books, with presentation of income/expenses on the balance sheet as retained earnings and current year earnings
* Can simulate cash basis accounting, using FIFO methodology to recode transactions involving liabilities and non-cash assets
## Background, demo and screenshots
See [https://yingtongli.me/blog/2020/03/31/ledger-pyreport.html](https://yingtongli.me/blog/2020/03/31/ledger-pyreport.html) for further discussion.
## Usage
Install the dependencies from PyPI, optionally in a virtual environment: (Commands presented for Linux/Mac)
```
virtualenv venv
. venv/bin/activate
pip install -r requirements.txt
```
Copy *config.example.yml* to *config.yml* (or set the *LEDGER_PYREPORT_CONFIG* environment variable to the path to the config file).
Run as per a usual Flask app, for example:
```
FLASK_APP=ledger_pyreport python -m flask run
```
## Notes on Ledger setup
ledger-pyreport expects each of assets, liabilities, equity, income and expenses to be setup in Ledger as a separate top-level account. These accounts should contain a zero balance, with all transactions in child accounts.
Additionally, ledger-pyreport expects the next level of assets and liabilities to be categories of asset and liability (e.g. *Assets:Current*, *Liabilities:Non-current*). These, too, should contain a zero balance.
A commodity which has *any* price data in Ledger (including those specified through `@` or `@@`, or explicitly through `P`) will be regarded as a commodity measured at fair market value, and automatically revalued accordingly. A commodity which has *no* price data in Ledger (i.e. lot prices through `{…}` or `{{…}}` only) will be regarded as a commodity measured at historical cost, and will not be subsequently revalued.
