curses.color_pair() now raises OverflowError for a pair number too large
to be packed, instead of silently masking it to a different pair.
The attr argument of the character-cell and attribute methods (addch,
addstr, attron, attrset and others) now goes through the checked attr
converter, so an out-of-range or non-integer attribute is rejected rather
than silently truncated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The screen dump embeds raw pointers that change after scr_restore(),
so comparing dump bytes is unreliable. Test the round-trip functionally
instead.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Note in the Bindings and events section that every widget inherits Tk
class bindings for its standard behavior, where they are documented, and
how to suppress an unwanted one by returning "break" from a callback.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
The curses C types and exceptions now set their tp_name to the public
module, so __module__, repr() and help() report curses.window,
curses.complexchar, curses.complexstr, curses.screen, curses.error,
curses.panel.panel and curses.panel.error instead of the underscore
extension modules.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Cover the drag cursor, the Motion and ButtonRelease bindings, switching
between targets, the target search up the master chain, dnd_accept()
returning None, and restarting after a drag has finished.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Textbox.edit() ignored typing in the lower-right cell of the window. It is
now written with insch(), which fills the cell without moving the cursor out
of the window (addch() there raises an error and scrolls a scrollable window).
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Map the auto-generated name of a cloned menu (a menu used as a menubar
or a cascade) back to the original widget instead of raising KeyError.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
focus_get(), focus_displayof(), focus_lastfor() and winfo_containing()
now return None instead of raising KeyError when the focused widget was
not created by tkinter (for example a torn-off menu).
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Add define_key(), key_defined() and keyok(), the ncurses extensions for
managing how control strings are recognized as key codes, beyond the
predefined terminfo keys and the all-or-nothing window.keypad().
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
The dump format embeds raw pointers on some platforms, so two dumps of the
same screen are not always byte-identical. Only compare dump files when
the format proves deterministic.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
A command created with createcommand() held a strong reference to the
interpreter, forming an uncollectable cycle (interpreter -> command ->
interpreter) that kept the interpreter and the callback alive until the
command was removed with deletecommand() or destroy(). The command now
borrows the reference; it cannot outlive the interpreter, which deletes its
commands when finalized.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Revert commits:
gh-151593: Fix dead lock in PyDict insert_split_key() (#152200)
gh-150490: Raise PyType_Modified for insertion into split dictionary (#150489)
For gh-150489, it violates locking discipline and results in deadlocks,
gh-151593 is an example of it being hit in CI. The attempted fix
gh-152200 avoids the deadlock but introduces a data-race. The race
window is small but can be triggered with pure Python code.
These module-level functions write the whole virtual screen to a file and
load it back -- the screen-wide counterpart of window.putwin()/getwin().
The filename argument accepts a string or a path-like object.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
idcok() and idlok() take effect only when the terminal can insert or
delete characters or lines, so check their getters against the
terminal's capabilities instead of asserting an unconditional round-trip.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
dupwin() returns a new window that is an independent duplicate of an existing
one -- same size, position, contents and attributes, but with its own cell
buffer, so changes to one do not affect the other.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
When a Tcl command running its own event loop (such as vwait or
wait_variable) was active and the user typed input on stdin, the event
loop kept spinning at 100% CPU. The stdin file handler is now removed as
soon as input becomes available.
Also fix gh-139816: an exception raised in a callback no longer stops the
event loop to wait for Enter on a Python built without readline; pending
callbacks keep running until input is actually available on stdin.
Co-authored-by: mdehoon <mjldehoon@yahoo.com>
Co-authored-by: Christopher Chavez <chrischavez@gmx.us>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Fix _PyDict_Or() and frozendict.copy(): only track the frozendict by
the GC once the dictionary is fully initialized.
Functions modifying frozendict now ensures that the object is not
tracked by the GC (in debug mode).
* can_modify_dict() checks that _PyObject_GC_IS_TRACKED() is false
for frozendicts.
* dict_merge_api() makes sure that the dictionary is tracked by the
GC.
Add io.BytesIO.peek() method to read without advancing position.
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Emma Smith <emma@emmatyping.dev>
Co-authored-by: Stan Ulbrych <stan@python.org>
Co-authored-by: Cody Maloney <cmaloney@users.noreply.github.com>
Add the immutable curses.complexstr type, an array of styled wide-character
cells -- the string counterpart of complexchar. It is constructible from an
iterable of cells (each a complexchar or a str) or from a string split into
cells, with optional attr and pair applied to every cell. It is an immutable
sequence (indexing yields a complexchar, slicing and concatenation yield a
complexstr), is hashable, and str() returns its cells' text.
Add the window method in_wchstr(), the wide-character counterpart of instr()
and in_wstr() that keeps each cell's attributes and color pair instead of
stripping them; it returns a complexstr.
The methods addstr(), addnstr(), insstr() and insnstr() now also accept a
complexstr, so a run read with in_wchstr() can be written back unchanged. The
cells carry their own rendition, so combining one with an explicit attr raises
TypeError.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
A negated multi-range property such as \P{ASCII} or \P{Pattern_Syntax} was
rejected inside a character class. Such members are now alternated in with
the other members: [\P{ASCII}abc] becomes [abc] | [^ASCII], and [\P{ASCII}]
alone is just the negated charset.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Add a compile-time optimization pass (Lib/re/_optimizer.py) that rewrites
set-operation character classes into a single character set where the
engine's charset() representation allows it. charset() treats every NEGATE
as a polarity toggle, so a mid-list NEGATE expresses set difference and a
flat run expresses union.
Set difference -- [A--B], emitted by the parser as A(?<![B]) -- fuses into
the charset [NEGATE] B [NEGATE] A, matching A minus B in one test instead of
a charset match plus a lookbehind rescan. _optimize_charset is made
segment-aware so the interior NEGATE compiles correctly.
A union with a non-flat operand, such as [0-9||[a-z--b]], is emitted by the
parser as a BRANCH that it cannot merge. Once its alternatives are all
one-character matchers, their item lists are concatenated into a single IN.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Add the immutable `curses.complexchar` type: a styled wide-character cell — a spacing character optionally followed by combining characters, plus attributes and a color pair. The color pair is stored separately rather than packed into a `chtype` via `COLOR_PAIR()`, so it is not limited to the values that fit alongside the attribute bits. `str(cc)` returns the text; the read-only `attr` and `pair` attributes return its rendition.
Add the window methods `in_wch()` and `getbkgrnd()` — the wide-character counterparts of `inch()` and `getbkgd()` — which return a `complexchar`. (`inch()`/`getbkgd()` can only return a packed `chtype`, so these fill a real gap; this resolves the long-standing gh-83395 request for `in_wch`.)
The existing character-cell methods (`addch`, `insch`, `echochar`, `bkgd`, `bkgdset`, `border`, `box`, `hline`, `vline`) now also accept a `complexchar`. A `complexchar` already carries its own rendition, so passing one together with an explicit `attr` argument raises `TypeError`.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Add the window methods attr_get(), attr_set(), attr_on(), attr_off() and
color_set(), wrapping wattr_get(), wattr_set(), wattr_on(), wattr_off() and
wcolor_set(). Unlike the legacy attron()/attroff()/attrset() methods, these
pass the color pair as a separate argument instead of packing it into the
attribute value. Also add the corresponding WA_* attribute constants.
Add an attr_converter that range-checks the attr_t attribute argument and
raises OverflowError instead of silently truncating it; apply it to attr_set(),
attr_on(), attr_off() and chgat().
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Add support for \p{property} and \P{property} escapes in Unicode (str)
regular expressions, for the properties the engine can resolve without
the unicodedata database. They are matched as CATEGORY opcodes or as
fixed sets of character ranges.
Supported in this change: many General_Category values (the groups L, N,
Z, C and the values Lu, Lt, Lm, Nd, Nl, No, Zs, Zl, Zp, Cc, Cf, Cs, Co
and Cn); the binary properties Alphabetic, Lowercase, Uppercase, Numeric,
Printable, XID_Start, XID_Continue, Cased and Case_Ignorable; the POSIX
compatibility classes; the code-point classes ASCII, Any, Assigned,
Noncharacter_Code_Point, Join_Control, Pattern_Syntax and
Pattern_White_Space; and Regional_Indicator, ASCII_Hex_Digit and
Hex_Digit.
Property and value names use loose matching (UAX #44 UAX44-LM3), so a
property may be spelled \p{Lu}, \p{gc=Lu} or \p{name=yes}.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
_PyDict_FromKeys() now creates a frozendict copy which is
not tracked by the GC.
dict_merge() no longer requires the dictionary to be tracked by the
GC.
Co-authored-by: Donghee Na <donghee.na@python.org>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>
The "build" command now also runs "pythoninfo-build" and
"pythoninfo-host" commands.
If no subcommand is provided, display the help.
GitHub Action "WASI":
* Add "pythoninfo-build" and "pythoninfo-host" commands.
* Remove unused and outdated CROSS_BUILD_PYTHON environment variable.
The tkinter.Variable methods trace_variable(), trace(), trace_vdelete()
and trace_vinfo(), deprecated since Python 3.14, are now scheduled for
removal in Python 3.17.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
