;; If Python support is enabled, then the following code may be ;; uncomment to demonstrate a rather useless example. ; !python ; from ledger import * ; def foo(d, val): ; return d.xact.amount + val ; !end ; ; --value-expr 'foo'{$100} 2004/05/01 Checking balance Assets:Checking $500.00 Equity:Opening Balances 2004/05/29 Book Store Expenses:Books $20.00 Assets:Checking 2004/05/29 Restaurant Expenses:Food $50.00 Liabilities:MasterCard 2004/09/16 Foo Assets:Foo $50 Income:Bar