Implements a two steps check in `importlib._bootstrap._find_and_load()` to avoid locking when the module has been already imported and it's ready.
---
Using `importlib.__import__()`, after this, does show a big difference:
Before:
```
$ ./python -c 'import timeit; print(timeit.timeit("__import__(\"timeit\")", setup="from importlib import __import__"))'
15.92248619502061
```
After:
```
$ ./python -c 'import timeit; print(timeit.timeit("__import__(\"timeit\")", setup="from importlib import __import__"))'
1.206068897008663
```
---
On non-Linux POSIX platforms, like FreeBSD or macOS,
the FD used to read a forked PTY may signal its exit not
by raising an error but by sending empty data to the read
syscall. This case wasn't handled, leading to hanging
`pty.spawn` calls.
Co-authored-by: Reilly Tucker Siemens <reilly@tuckersiemens.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
* Refactor dispatch logic to make flow of control clearer. Moves lltrace and dxprofile instrumentation into DISPATCH macro.
* Remove switch in interpreter loop when using computed gotos. There is no need for two nearly-duplicate dispatch tables.
This was causing test___all__ to fail on platforms lacking a shared
memory implementation.
Co-Authored-By: Xavier de Gaye <xdegaye@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
* Generalize cache names for LOAD_ATTR to allow store and delete specializations.
* Factor out specialization of attribute dictionary access.
* Specialize STORE_ATTR.
* MemoryError is now raised instead of sqlite3.Warning when
memory is not enough for encoding a statement to UTF-8
in Connection.__call__() and Cursor.execute().
* UnicodEncodeError is now raised instead of sqlite3.Warning when
the statement contains surrogate characters
in Connection.__call__() and Cursor.execute().
* TypeError is now raised instead of ValueError for non-string
script argument in Cursor.executescript().
* ValueError is now raised for script containing the null
character instead of truncating it in Cursor.executescript().
* Correctly handle exceptions raised when getting boolean value
of the result of the progress handler.
* Add many tests covering different corner cases.
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
MemoryError raised in user-defined functions will now preserve
its type. OverflowError will now be converted to DataError.
Previously both were converted to OperationalError.
Fix the os.set_inheritable() function on FreeBSD 14 for file
descriptor opened with the O_PATH flag: ignore the EBADF error on
ioctl(), fallback on the fcntl() implementation.
* When trying to allocate very large regions on macOS, malloc does not fail silently. It sends a noisy error out to STDERR
* This provides a helper function to warn the user, and provides the warning for test_decimal, which consistently generates these warnings on macOS.
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
The threading debug (PYTHONTHREADDEBUG environment variable) is
deprecated in Python 3.10 and will be removed in Python 3.12. This
feature requires a debug build of Python.
* Unify the C and Python implementations of OrderedDict.popitem().
The C implementation no longer calls ``__getitem__`` and ``__delitem__``
methods of the OrderedDict subclasses.
* Change popitem() and pop() methods of collections.OrderedDict
For consistency with dict both implementations (pure Python and C)
of these methods in OrderedDict no longer call __getitem__ and
__delitem__ methods of the OrderedDict subclasses.
Previously only the Python implementation of popitem() did not
call them.
For example Callable[P, T][[int], str, float] will now raise an error.
Use also term "arguments" instead of "parameters" in error
message for too few/many arguments.
When sys.stdout.encoding is None compile_file will fall back to
sys.getdefaultencoding to encode/decode error messages.
Co-authored-by: Stefan Hoelzl <stefan.hoelzl@posteo.de>
Co-authored-by: Mickaël Schoentgen <contact@tiger-222.fr>
* rlcompleter was calling these methods to identify whether to add
parenthesis to the completion, based on if the attribute is callable.
* for property objects, completion with parenthesis are never desirable.
* property methods with print statements behaved very strangely, which
was especially unfriendly to language newcomers. <tab> could suddenly
produce output unexpectedly.
`pathlib.PureWindowsPath.is_reserved()` now identifies as reserved
filenames with trailing spaces or colons.
Co-authored-by: Barney Gale <barney.gale@foundry.com>
Co-authored-by: Eryk Sun <eryksun@gmail.com>
* bpo-44461: Fix bug with pdb's handling of import error due to a package which does not have a __main__ module
* 📜🤖 Added by blurb_it.
* remove "else"
Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>
* If running as a module, first check that it can run as a module. Alternate fix for bpo-44461.
Co-authored-by: Irit Katriel <iritkatriel@yahoo.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
* Convert "specials" array to InterpreterFrame struct, adding f_lasti, f_state and other non-debug FrameObject fields to it.
* Refactor, calls pushing the call to the interpreter upward toward _PyEval_Vector.
* Compute f_back when on thread stack, only filling in value when frame object outlives stack invocation.
* Move ownership of InterpreterFrame in generator from frame object to generator object.
* Do not create frame objects for Python calls.
* Do not create frame objects for generators.
Replace sentence with confusing "pseudo-module" with two sentences
separating future statements and the __future__ module.
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
* Remove code that checks Py_TPFLAGS_HAVE_VERSION_TAG
The field is always present in the type struct, as explained
in the added comment.
* Remove Py_TPFLAGS_HAVE_AM_SEND
The flag is not needed, and since it was added in 3.10 it can be removed now.
Dong-hee Na
Ken Jin
Hai Shi
Gautam Chaudhuri
Maximilian Hils
Łukasz Langa
Mark Shannon
Bar Harel
dnknth
andrei kulakov
Nikita Sobolev
Germán Méndez Bravo
Pablo Galindo Salgado
Irit Katriel
Zephyr Shannon
Mark Roseman
Terry Jan Reedy
Zsolt Dollenstein
Anthony Shaw
Johannes Reiff
Zackery Spytz
Serhiy Storchaka
Ronald Oussoren
Thomas Grainger
Jack DeVries
Raymond Hettinger
Tzu-ping Chung
Bas van Beek
Victor Stinner
Erlend Egeberg Aasland
William Chargin
Noah
Miguel Brito
Jake Stockwin
Jason R. Coombs
Stefan Hoelzl
Yurii Karabas
Inada Naoki
Ray Donnelly
Barney Gale
Geoffrey Thomas
Mariusz Felisiak
Nick Coghlan
Jelle Zijlstra
T. Wouters
Hasan
Logan Jones
Steven Hsu
Charles Burkland
Filipe Laíns
Dennis Sweeney
Dong-hee Na
Petr Viktorin
Anthony Sottile