[adilkhanovkz]

Release 0.2.3.

• 80 more spreadsheet functions, each written as a live formula — errors and branches (IFERROR, ISERROR, ISNUMBER, XOR, IFS, SWITCH); rounding, powers and logarithms (ROUNDUP, CEILING, POWER, SQRT, LN, PRODUCT, …); loan schedules and depreciation (NPER, RATE, IPMT, PPMT, CUMIPMT, CUMPRINC, SLN, DB, DDB, SYD); dates (DATEDIF, WEEKDAY, WEEKNUM, NETWORKDAYS, WORKDAY); text (LEFT, MID, FIND, SUBSTITUTE, TEXT, TEXTJOIN, …); conditional sums and counts (SUMIF(S), COUNTIF(S), AVERAGEIF(S), MAXIFS, MINIFS, COUNT, COUNTA); lookups (XLOOKUP, INDEX, MATCH, VLOOKUP, HLOOKUP); and statistics (MEDIAN, STDEV_S, VAR_S, PERCENTILE_INC, QUARTILE_INC, LARGE, SMALL, RANK_EQ, …).
• More grains of time — hours on a fixed-offset zone, ISO weeks and ISO years, and the half-year, each with its mo.time, header formulas and totals columns; a day sheet totals by month; modeleon.core.calendar and period_bounds / year_back_index give each period's dates to your own code.
• Named Excel views — with mo.applied_view(model.board): model.to_excel(path) writes the same model under another look.
• Every function reads a line on another time window by date, and lines along keys key by key, as a + b does — in Python and in the workbook.
• Units are checked wherever values are combined — functions that add, compare or pick refuse two units; a bps or pp count beside a % fraction is refused; a recurrence is in its start's unit; a unit with several slashes reads as written.
• Faster — a 2,000-line model builds in about three quarters of the time; a records table of thousands of rows is written in linear time.
• Fixes: a tracked row reads by position (closing[-1]), a container cannot hold itself, a view hung where nothing reads it warns with the slot to use, a grain or totals kind the engine does not know is refused where it is given, and more.

Behaviour changes: mo.SUM(a, b) and mo.AVERAGE(a, b) over two or more series now work period by period (a subtotal, =SUM(C5, C9) in each column); the total of several rows over all their periods is mo.SUM(a) + mo.SUM(b). A model that mixed units in a function, a comparison, a lag's fill or a loan's amounts, or added a bps / pp count to a % fraction, is refused with a message that names the fix. A line on another time window is read by date; one that does not cover the combined window needs a rule, extend=mo.zero() or extend=mo.hold(). .shift(n, fill_value=<line>) writes the fill as a live cell.

The full list is in CHANGELOG.md.