PR #2187 made GncPrice.get_value() return a GncNumeric wrapper and clone() a
fully wrapped GncPrice. The price example scripts still used the pre-5.15 raw
_gnc_numeric idiom and broke -- reported as Bug 799796 (cloned prices silently
kept the original value).
Example scripts (bindings/python/example_scripts/):
* quotes_historic.py -- reworked to the modern idiom; it now actually runs on
5.x (it had further latent breakage beyond the reported one):
- Construct each price directly with GncPrice(book) + setters instead of
cloning an existing price, so the script no longer needs a pre-existing
price in the book. Look the pricing currency (USD) up from the commodity
table rather than deriving it from a split.
- Build the value with the double->GncNumeric constructor at GnuCash's
standard price precision -- the pricing currency's SCU * COMMODITY_DENOM_MULT
rounded HALF_UP (gnc-pricedb.h "Price policy") -- dropping the
Fraction.from_float().limit_denominator(100000) dance and its import.
- Set the source with the PriceSource enum -- set_source(PriceSource.FINANCE_QUOTE)
(the enum added in #2317). The original set_source("Finance::Quotes::Historic")
passed a string to what has been an enum setter since 2.6, which raises
TypeError on modern bindings.
- Open with Session(url), which defaults to SESSION_NORMAL_OPEN. The old
Session(url, True, False, False) passed the deprecated ignore_lock=True,
silently bypassing the book's lock file.
* priceDB_test.py, price_database_example.py -- num/denom are methods now, so
read v.num() / v.denom().
Prevent silent recurrence (gnucash_core.py):
The write path failed *silently*, which is how this slipped through review and
CI. num/denom are read-only accessor methods, so assigning to them merely
shadows the method and changes nothing. Add a GncNumeric.__setattr__ that raises
AttributeError on assignment to num/denom, pointing at the correct idiom
GncNumeric(num, denom).
Test (bindings/python/tests/test_numeric.py):
New test_num_denom_read_only covering the guard. It needs no backend, so it runs
in the existing python-bindings CTest on all platforms.
The wiki page Stocks/get_prices, which the reporter copied from, is being
updated separately.
It is split into
- /libgnucash (for the non-gui bits)
- /gnucash (for the gui)
- /common (misc source files used by both)
- /bindings (currently only holds python bindings)
This is the first step in restructuring the code. It will need much
more fine tuning later on.
Noerr
Geert Janssens
c-holtermann
Rob Reid
John Ralls