python / cpython

(cherry picked from commit 8ea6353)

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>

…GH-20949)

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: @tiran.
(cherry picked from commit bb6ec14)

Co-authored-by: Christian Heimes <christian@python.org>

Adds a simple check for whether or not the package is being installed in the GUI or using installer on the command line. This addresses an issue where CLI-based software management tools (such as Munki) unexpectedly open Finder windows into a GUI session during installation runs.

Change includes to fix building with Python 3.x and to
build correctly on newer macOS systems with SIP.

…H-20900)

Co-authored-by: Xavier Fernandez <xav.fernandez@gmail.com>
(cherry picked from commit e63cc2f)

Co-authored-by: Ned Deily <nad@python.org>

ensurepip optionally installs or upgrades 'pip' and 'setuptools' using
the version of those modules bundled with Python.  The internal PIP
installation routine by default temporarily uses its cache, if it
exists.  This is undesirable as Python builds and installations may be
independent of the user running the build, whilst PIP cache location
is dependent on the user's environment and outside of the build
environment.

At the same time, there's no value in using the cache while installing
bundled modules.

This change disables PIP caching when used in ensurepip.
(cherry picked from commit 4a3a682)

Co-authored-by: Krzysztof Konopko <kkonopko@users.noreply.github.com>

) (GH-20892)

In Python 3.7 the behavior of parse_multipart changed requiring CONTENT-LENGTH
header, this fix remove this header as required and fix FieldStorage
read_lines_to_outerboundary, by not using limit when it's negative,
since by default it's -1 if not content-length and keeps substracting what
was read from the file object.

Also added a test case for this problem.
(cherry picked from commit d8cf351)


Co-authored-by: roger <rogerduran@gmail.com>

Automerge-Triggered-By: @ned-deily

) (GH-20861)

(cherry picked from commit dea3223)


Co-authored-by: Zackery Spytz <zspytz@gmail.com>

Automerge-Triggered-By: @brettcannon

Co-authored-by: Srinivas Reddy Thatiparthy (శ్రీనివాస్  రెడ్డి తాటిపర్తి) <thatiparthysreenivas@gmail.com>

Remote host cyrus.andrew.cmu.edu is blocking incoming connections and is
causing test suite to fail.

Signed-off-by: Christian Heimes <christian@python.org>

…GH-19762)

require `_generate_next_value_` to be defined before members
(cherry picked from commit d9a43e2)

unittest.TestCase.assertWarns no longer raises a RuntimeException
when accessing a module's ``__warningregistry__`` causes importation of a new
module, or when a new module is imported in another thread.
(cherry picked from commit 46398fb)

Co-authored-by: kernc <kerncece@gmail.com>

…H-20687) (GH-20793)

The doccumentation at https://docs.python.org/3.10/library/weakref.html cautions that the `WeakKeyDictionary` and `WeakValueDictionary` are susceptible to the problem of dictionary mutation during iteration.

These notes present the user with a problem that has no easy solution.

I dug into the implementation and found that fortunately, Antoine Pitrou already addressed this challenge (10 years ago!) by introducing an `_IterationGuard` context manager to the implementation, which delays mutation while an iteration is in progress.

I asked for confirmation and @pitrou agreed that these notes could be removed:
c1baa60.
(cherry picked from commit 1642c0e)

Co-authored-by: Daniel Fortunov <asqui@users.noreply.github.com>

Automerge-Triggered-By: @pitrou

…ecisions (GH-20748)

This reverts commit c6f9554.

…sion arithmetic (GH-20746)

This reverts commit 00e4587.

…H-20744)

This reverts commit 24c570b.

(cherry picked from commit 3a3a30c)

Co-authored-by: Steve Dower <steve.dower@python.org>

…0367)

Also added an example in shutil in order to make more clear how they are to be used.

Initially reported by Weinan Li on bpo.
(cherry picked from commit 7633371)

Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>

(cherry picked from commit 37eed5a)

Co-authored-by: Ned Deily <nad@python.org>

A tiny sliver of a 3.9 PEG parser patch needed to backport the test added by GH-20486.
(cherry picked from commit a5d6aba)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Before
```
content.txt is 42 bytes in size and isa regular file.
folder is 420 bytes in size and isa directory.
magic is 4200 bytes in size and issomething else.
```

After:
```
content.txt is 42 bytes in size and is a regular file.
folder is 420 bytes in size and is a directory.
magic is 4200 bytes in size and is something else.
```

Automerge-Triggered-By: @orsenthil
(cherry picked from commit 7a28019)

Co-authored-by: Harsha Laxman <HarshaLaxman@users.noreply.github.com>

Would be nice to backport to python 3.7+. I don't think it's worth the hassle to backport this all the way down to 3.10. But I'll let the maintainers decide.

This is hard to test because the test setup already includes this [environment variable](https://github.com/python/cpython/blob/master/Lib/test/pythoninfo.pyGH-L292)

Let me know if something doesn't match the PR guidelines. This is my first PR in the python source code.
(cherry picked from commit c822efe)

Co-authored-by: Jeremy Attali <jeremy.attali@gmail.com>

(cherry picked from commit fe5dd78)

Co-authored-by: Steve Dower <steve.dower@python.org>

(cherry picked from commit c896666)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>