A simple balance report. It has:

1. a list of items, one per account, each containing:

• the full account name
• the Ledger-style elided short account name (the leaf account name, prefixed by any boring parents immediately above); or with --flat, the full account name again
• the number of indentation steps for rendering a Ledger-style account tree, taking into account elided boring parents, --no-elide and --flat
• an amount

1. the total of all amounts

Enabling this makes balance --flat --empty also show parent accounts without postings, in addition to those with postings and a zero balance. Disabling it shows only the latter. No longer supported, but leave this here for a bit. flatShowsPostinglessAccounts = True

Generate a simple balance report, containing the matched accounts and their balances (change of balance) during the specified period. This is like PeriodChangeReport with a single column (but more mature, eg this can do hierarchical display).

When true (the default), this makes balance --flat reports and their implementation clearer. Single/multi-col balance reports currently aren't all correct if this is false.

A sorting helper: sort a list of things (eg report rows) keyed by account name to match the provided ordering of those same account names.

Helper to unify a MixedAmount to a single commodity value. Like normaliseMixedAmount, this consolidates amounts of the same commodity and discards zero amounts; but this one insists on simplifying to a single commodity, and will throw a program-terminating error if this is not possible.

Helper to calculate the percentage from two mixed. Keeps the sign of the first argument. Uses unifyMixedAmount to unify each argument and then divides them.