From ca056f4499c259c0de68ed7cefad7ee7b62bfa43 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 3 May 2023 12:48:02 +0200 Subject: [PATCH] Python: Drop support for Python 3.7 Debian 10 is not anymore a supported distro, since Debian 12 was released on June 10, 2023. Our supported build platforms as of today all support at least 3.8 (and all of them except for Ubuntu 20.04 support 3.9): openSUSE Leap 15.5: 3.6.15 (3.11.2) CentOS Stream 8: 3.6.8 (3.8.13, 3.9.16, 3.11.4) CentOS Stream 9: 3.9.17 (3.11.4) Fedora 37: 3.11.4 Fedora 38: 3.11.4 Debian 11: 3.9.2 Debian 12: 3.11.2 Alpine 3.14, 3.15: 3.9.16 Alpine 3.16, 3.17: 3.10.10 Ubuntu 20.04 LTS: 3.8.10 Ubuntu 22.04 LTS: 3.10.12 NetBSD 9.3: 3.9.13* FreeBSD 12.4: 3.9.16 FreeBSD 13.1: 3.9.18 OpenBSD 7.2: 3.9.17 Note: NetBSD does not appear to have a default meta-package, but offers several options, the lowest of which is 3.7.15. However, "python39" appears to be a pre-requisite to one of the other packages we request in tests/vm/netbsd. Since it is safe under our supported platform policy, bump our minimum supported version of Python to 3.8. The two most interesting features to have by default include: - the importlib.metadata module, whose lack is responsible for over 100 lines of code in mkvenv.py - improvements to asyncio, for example asyncio.CancelledError inherits from BaseException rather than Exception In addition, code can now use the assignment operator ':=' Because mypy now learns about importlib.metadata, a small change to mkvenv.py is needed to pass type checking. Signed-off-by: Paolo Bonzini --- configure | 8 ++++---- python/Makefile | 8 ++++---- python/scripts/mkvenv.py | 5 ++++- python/setup.cfg | 7 +++---- python/tests/minreqs.txt | 2 +- scripts/qapi/mypy.ini | 2 +- 6 files changed, 17 insertions(+), 15 deletions(-) diff --git a/configure b/configure index 48ae0fc05a..e08127045d 100755 --- a/configure +++ b/configure @@ -552,16 +552,16 @@ if test -n "$linux_arch" && ! test -d "$source_path/linux-headers/asm-$linux_arc fi check_py_version() { - # We require python >= 3.7. + # We require python >= 3.8. # NB: a True python conditional creates a non-zero return code (Failure) - "$1" -c 'import sys; sys.exit(sys.version_info < (3,7))' + "$1" -c 'import sys; sys.exit(sys.version_info < (3,8))' } first_python= if test -z "${PYTHON}"; then # A bare 'python' is traditionally python 2.x, but some distros # have it as python 3.x, so check in both places. - for binary in python3 python python3.11 python3.10 python3.9 python3.8 python3.7; do + for binary in python3 python python3.11 python3.10 python3.9 python3.8; do if has "$binary"; then python=$(command -v "$binary") if check_py_version "$python"; then @@ -952,7 +952,7 @@ then fi if ! check_py_version "$python"; then - error_exit "Cannot use '$python', Python >= 3.7 is required." \ + error_exit "Cannot use '$python', Python >= 3.8 is required." \ "Use --python=/path/to/python to specify a supported Python." \ "Maybe try:" \ " openSUSE Leap 15.3+: zypper install python39" \ diff --git a/python/Makefile b/python/Makefile index 7c70dcc8d1..1fa4ba2498 100644 --- a/python/Makefile +++ b/python/Makefile @@ -9,13 +9,13 @@ help: @echo "make check-minreqs:" @echo " Run tests in the minreqs virtual environment." @echo " These tests use the oldest dependencies." - @echo " Requires: Python 3.7" - @echo " Hint (Fedora): 'sudo dnf install python3.7'" + @echo " Requires: Python 3.8" + @echo " Hint (Fedora): 'sudo dnf install python3.8'" @echo "" @echo "make check-tox:" @echo " Run tests against multiple python versions." @echo " These tests use the newest dependencies." - @echo " Requires: Python 3.7 - 3.11, and tox." + @echo " Requires: Python 3.8 - 3.11, and tox." @echo " Hint (Fedora): 'sudo dnf install python3-tox python3.11'" @echo " The variable QEMU_TOX_EXTRA_ARGS can be use to pass extra" @echo " arguments to tox". @@ -59,7 +59,7 @@ PIP_INSTALL = pip install --disable-pip-version-check min-venv: $(QEMU_MINVENV_DIR) $(QEMU_MINVENV_DIR)/bin/activate $(QEMU_MINVENV_DIR) $(QEMU_MINVENV_DIR)/bin/activate: setup.cfg tests/minreqs.txt @echo "VENV $(QEMU_MINVENV_DIR)" - @python3.7 -m venv $(QEMU_MINVENV_DIR) + @python3.8 -m venv $(QEMU_MINVENV_DIR) @( \ echo "ACTIVATE $(QEMU_MINVENV_DIR)"; \ . $(QEMU_MINVENV_DIR)/bin/activate; \ diff --git a/python/scripts/mkvenv.py b/python/scripts/mkvenv.py index 4f2349fbb6..57a2494803 100644 --- a/python/scripts/mkvenv.py +++ b/python/scripts/mkvenv.py @@ -435,6 +435,7 @@ def _gen_importlib(packages: Sequence[str]) -> Iterator[str]: try: # First preference: Python 3.8+ stdlib from importlib.metadata import ( # type: ignore + EntryPoint, PackageNotFoundError, distribution, ) @@ -442,6 +443,7 @@ def _gen_importlib(packages: Sequence[str]) -> Iterator[str]: logger.debug("%s", str(exc)) # Second preference: Commonly available PyPI backport from importlib_metadata import ( # type: ignore + EntryPoint, PackageNotFoundError, distribution, ) @@ -449,7 +451,8 @@ def _gen_importlib(packages: Sequence[str]) -> Iterator[str]: def _generator() -> Iterator[str]: for package in packages: try: - entry_points = distribution(package).entry_points + entry_points: Iterator[EntryPoint] = \ + iter(distribution(package).entry_points) except PackageNotFoundError: continue diff --git a/python/setup.cfg b/python/setup.cfg index e74b58a8c2..f6d2d8a136 100644 --- a/python/setup.cfg +++ b/python/setup.cfg @@ -14,7 +14,6 @@ classifiers = Natural Language :: English Operating System :: OS Independent Programming Language :: Python :: 3 :: Only - Programming Language :: Python :: 3.7 Programming Language :: Python :: 3.8 Programming Language :: Python :: 3.9 Programming Language :: Python :: 3.10 @@ -22,7 +21,7 @@ classifiers = Typing :: Typed [options] -python_requires = >= 3.7 +python_requires = >= 3.8 packages = qemu.qmp qemu.machine @@ -76,7 +75,7 @@ exclude = __pycache__, [mypy] strict = True -python_version = 3.7 +python_version = 3.8 warn_unused_configs = True namespace_packages = True warn_unused_ignores = False @@ -192,7 +191,7 @@ multi_line_output=3 # of python available on your system to run this test. [tox:tox] -envlist = py37, py38, py39, py310, py311 +envlist = py38, py39, py310, py311 skip_missing_interpreters = true [testenv] diff --git a/python/tests/minreqs.txt b/python/tests/minreqs.txt index 979461be6b..a3f423efd8 100644 --- a/python/tests/minreqs.txt +++ b/python/tests/minreqs.txt @@ -1,5 +1,5 @@ # This file lists the ***oldest possible dependencies*** needed to run -# "make check" successfully under ***Python 3.7***. It is used primarily +# "make check" successfully under ***Python 3.8***. It is used primarily # by GitLab CI to ensure that our stated minimum versions in setup.cfg # are truthful and regularly validated. # diff --git a/scripts/qapi/mypy.ini b/scripts/qapi/mypy.ini index 3463307ddc..56e0dfb132 100644 --- a/scripts/qapi/mypy.ini +++ b/scripts/qapi/mypy.ini @@ -1,7 +1,7 @@ [mypy] strict = True disallow_untyped_calls = False -python_version = 3.7 +python_version = 3.8 [mypy-qapi.schema] disallow_untyped_defs = False