(cherry picked from commit 9b50a7f2)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

(cherry picked from commit caccca78)
Co-authored-by: Andrés Delfino <adelfino@gmail.com>

(cherry picked from commit b6bb77c2)
Co-authored-by: Andrés Delfino <adelfino@gmail.com>

(cherry picked from commit 2d748389)
Co-authored-by: Andrés Delfino <adelfino@gmail.com>

(cherry picked from commit 03dd0e79)
Co-authored-by: Andrés Delfino <adelfino@gmail.com>

(cherry picked from commit 6cfe45a5)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

(cherry picked from commit 2800dcf6)
Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>

"can be used do declare" → "can be used to declare"
(cherry picked from commit 86bfed37)
Co-authored-by: João D. Ferreira <jotomicron@gmail.com>

(cherry picked from commit cb4bae72)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

* Always return bytes from _HackedGetData.get_data().

Ensure the imp.load_source shim always returns bytes by reopening the file in
binary mode if needed. Hash-based pycs have to receive the source code in bytes.

It's tempting to change imp.get_suffixes() to always return 'rb' as a mode, but
that breaks some stdlib tests and likely 3rdparty code, too.
(cherry picked from commit b0274f2c)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

(cherry picked from commit 0b752287)
Co-authored-by: Yury Selivanov <yury@magic.io>

The multiprocessing module now uses the monotonic clock
time.monotonic() instead of the system clock time.time() to implement
timeouts.
(cherry picked from commit c2368cbc)
Co-authored-by: Victor Stinner <vstinner@redhat.com>

(cherry picked from commit 6f19fc6d)
Co-authored-by: Robert Krzyzanowski <technoguyrob@gmail.com>

[3.7] bpo-33899: Make tokenize module mirror end-of-file is end-of-line behavior (GH-7891) (GH-8132)

Most of the change involves fixing up the test suite, which previously made
the assumption that there wouldn't be a new line if the input didn't end in
one.

Contributed by Ammar Askar.

(cherry picked from commit c4ef4896)

(cherry picked from commit d8c3e820)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

The line is speaking of a list of commands, not the list command.
(cherry picked from commit 7943c5e8)
Co-authored-by: Julien Palard <julien@palard.fr>

It was moved from bitbucket to GitHub.

(cherry picked from commit a6e1e41e)

(cherry picked from commit 3c8aae9f)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

(cherry picked from commit e55ca3fd)
Co-authored-by: Artjom <tjomk@users.noreply.github.com>

subprocess.Popen now copies the startupinfo argument to leave it
unchanged: it will modify the copy, so that the same STARTUPINFO
object can be used multiple times.

Add subprocess.STARTUPINFO._copy() private method.

Python 3.7 backport from master makes the copy() private: renamed to
_copy().

(cherry picked from commit 483422f5)

Use DeprecationWarning instead of PendingDeprecationWarning.

(cherry picked from commit 09bb918a)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

(cherry picked from commit fc05e68d)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

(cherry picked from commit 3a9bb5f2)
Co-authored-by: Sergey Fedoseev <fedoseev.sergey@gmail.com>

This commit fixes the -timedelta overfllow issue not documented properly.
Signed-off-by: Farhaan Bukhsh <farhaan.bukhsh@gmail.com>
(cherry picked from commit 5b6e49a1)
Co-authored-by: Farhaan Bukhsh <farhaan.bukhsh@gmail.com>

Result of function interpreter_requires_environment() depends on os.environ.
This was not covered by the tests, leading to fail when PYTHONHOME was set.
(cherry picked from commit a390cb6b)
Co-authored-by: Lorenz Mende <Lorenz.mende@gmail.com>

Fix test_forkserver_sigkill() of test_multiprocessing_forkserver:
give more time to the first child process to complete, double the
sleep in the parent process.

Reduce also the child process sleep from 1000 ms to 500 ms, to not change
the total duration of the test.
(cherry picked from commit 07888e1c)
Co-authored-by: Victor Stinner <vstinner@redhat.com>

During buffered read, use a list followed by join instead of extending a bytes object.
This is how it was done before but changed in commit b506dc32.
(cherry picked from commit 12a08c47)
Co-authored-by: hajoscher <hajoscher@gmail.com>

(cherry picked from commit 97ae32c9)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

(cherry picked from commit b4588c2f)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

PyErr_Print() will not return when the exception is a SystemExit, so
decref the __main__ module object in that case.
(cherry picked from commit d8cba5d1)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

(cherry picked from commit 831c2972)
Co-authored-by: Sergey Fedoseev <fedoseev.sergey@gmail.com>

The Opera Browser was using a outdated command line invocation that resulted in an incorrect URL being opened in the browser when requested using the webbrowser module.

* Correct the arguments passed to the Opera Browser when opening a new URL.
(cherry picked from commit 3cf1f154)
Co-authored-by: Bumsik Kim <k.bumsik@gmail.com>

When hunting memory leaks using -R 3:3, test_imap_unordered() of
test_multiprocessing leaks randomly a few memory blocks. It is a
false alarm: when testing using -R 3:20 for example, no leak is
detected.

Modify test_imap_unordered() to be closer to test_imap():

* Only test 10 numbers instead of 1000: it's a pool of 4 processes, so
  10 is enough to test at least one number per process
* Use chunksize=100 instead of chunksize=53 to mimick test_imap()
(cherry picked from commit 23401fb9)
Co-authored-by: Victor Stinner <vstinner@redhat.com>

 The line-length limit is not needed because the pages appear in a separate app rather
 than on a browser tab.  It can also interact badly with the DPI setting.
(cherry picked from commit d824ca7f)
Co-authored-by: Zachary Ware <zachary.ware@gmail.com>

(cherry picked from commit 087570af)
Co-authored-by: Xtreak <tirkarthi@users.noreply.github.com>

(cherry picked from commit fe524df3)

They can be exposed when some C API calls fail due to lack of
memory.

* Failed Py_BuildValue() could cause an assertion error in the
  following TextIOWrapper.tell().
* input_chunk could be decrefed twice in TextIOWrapper.seek()
  after failed Py_BuildValue().
* initvalue could leak in StringIO.__getstate__() after failed
  PyDict_Copy().
(cherry picked from commit fdb5a50e)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

* `flags` is indeed deprecated, but there is a validation on its value for
  backwards compatibility reasons.  This adds mention of this in the docs.
* The docs say that `sizehint` is deprecated and ignored, but it is still
  used when `epoll_create1()` is unavailable. This adds mention of this in
  the docs.
* `sizehint=-1` is acceptable again, and is replaced with `FD_SETSIZE-1`.
  This is needed to have a default value available at the Python level,
  since `FD_SETSIZE` is not exposed to Python. (see: bpo-31938)
* Reject `sizehint=0` since it is invalid to pass on to `epoll_create()`.

The relevant tests have also been updated.

(cherry picked from commit 0cdf5f42)
Co-authored-by: Tal Einat <taleinat+github@gmail.com>