The different namespaces are:
Function Value expression functions, which receive a "context"
Option Command-line options
Precommand Commands which are invoked before reading the journal
Command Commands which are invoked after reading the journal
Directive Directives that occur at column 0 in a data file
This greatly eases the ability for Python uses to add intercept hooks to
change how the basic Ledger module functions. An example of what should
be possible soon:
import ledger
def my_foo_handler(value):
print "--foo received:", value
ledger.add_handler(ledger.Option, "foo=", my_foo_handler)
This is necessary because sometimes, a post from one account will get
reported as though it were in another account (this happens with
--budget, to show child account postings within their parent account).
In that case, the account needs to remember which postings have been
reported as being within it, so that it can add these amounts to its own
total in the balance report.
This way, if the running total is off by a penny or two due to rounding
of one or more commodities in the account, the user will see it.
This commit also reorganizes the testing code a bit, which I did after
adding the ninth test series (ConfirmTests), to validate the new
rounding code.
