🔥 drop Python 3.8 support (#515)

CMakeLists.txt

@@ -33,7 +33,7 @@ if(BUILD_MQT_QMAP_BINDINGS)
 
   # top-level call to find Python
   find_package(
-    Python 3.8 REQUIRED
+    Python 3.9 REQUIRED
     COMPONENTS Interpreter Development.Module
     OPTIONAL_COMPONENTS Development.SABIModule)
 endif()

README.md

@@ -36,7 +36,7 @@ If you have any questions, feel free to contact us via [quantum.cda@xcit.tum.de]
   </a>
 </p>
 
-QMAP is available via [PyPI](https://pypi.org/project/mqt.qmap/) for Linux, macOS, and Windows and supports Python 3.8 to 3.12.
+QMAP is available via [PyPI](https://pypi.org/project/mqt.qmap/) for Linux, macOS, and Windows and supports Python 3.9 to 3.13.
 
 ```console
 (venv) $ pip install mqt.qmap
@@ -76,7 +76,7 @@ circ_opt, results = qmap.optimize_clifford(circ)
 
 ## System Requirements and Building
 
-The implementation is compatible with any C++17 compiler, a minimum CMake version of 3.19, and Python 3.8+.
+The implementation is compatible with any C++17 compiler, a minimum CMake version of 3.19, and Python 3.9+.
 Please refer to the [documentation](https://mqt.readthedocs.io/projects/qmap) on how to build the project.
 
 Building (and running) is continuously tested under Linux, macOS, and Windows using the [latest available system versions for GitHub Actions](https://github.com/actions/virtual-environments).

docs/source/Installation.rst

@@ -34,7 +34,7 @@ In most practical cases (under 64-bit Linux, MacOS incl. Apple Silicon, and Wind
         (venv) $ pip install --upgrade pip setuptools wheel
 
 .. warning::
-     As of version 2.1.0, support for Python 3.7 has been officially dropped.
+     As of version 2.7.0, support for Python 3.8 has been officially dropped.
      We strongly recommend that users upgrade to a more recent version of Python to ensure compatibility and continue receiving updates and support.
      Thank you for your understanding.
 

noxfile.py

@@ -18,7 +18,7 @@
 
 nox.options.sessions = ["lint", "tests", "minimums"]
 
-PYTHON_ALL_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+PYTHON_ALL_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
 # The following lists all the build requirements for building the package.
 # Note that this includes transitive build dependencies of package dependencies,
@@ -101,18 +101,17 @@ def docs(session: nox.Session) -> None:
     extra_installs = ["sphinx-autobuild"] if serve else []
     session.install(*BUILD_REQUIREMENTS, *extra_installs)
     session.install("--no-build-isolation", "-ve.[docs]", "--reinstall-package", "mqt.qmap")
-    session.chdir("docs")
 
     if args.builder == "linkcheck":
-        session.run("sphinx-build", "-b", "linkcheck", "source", "_build/linkcheck", *posargs)
+        session.run("sphinx-build", "-b", "linkcheck", "docs", "docs/_build/linkcheck", *posargs)
         return
 
     shared_args = (
         "-n",  # nitpicky mode
         "-T",  # full tracebacks
         f"-b={args.builder}",
-        "source",
-        f"_build/{args.builder}",
+        "docs",
+        f"docs/_build/{args.builder}",
         *posargs,
     )
 

pyproject.toml

@@ -30,7 +30,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -39,7 +38,7 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Typing :: Typed",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "qiskit[qasm3-import]>=1.0.0",
     "rustworkx[all]>=0.14.0",
@@ -151,7 +150,6 @@ xfail_strict = true
 filterwarnings = [
   "error",
   'ignore:.*datetime\.datetime\.utcfromtimestamp.*:DeprecationWarning:',
-  'ignore:.*Qiskit with Python 3.8.*:DeprecationWarning:',
   'ignore:.*qiskit\.providers\.models.* is deprecated.*:DeprecationWarning:qiskit.*', # Qiskit imports deprecated code (should be resolved in the 1.2.1 release)
   'ignore:.*Treating CircuitInstruction as an iterable is deprecated.*:DeprecationWarning:mqt.qcec.*', # Needs a new release of QCEC (should be resolved in 2.7.1)
   # we purposely maintain compatibility with the V1 backends until Qiskit removes them in 2.0
@@ -176,7 +174,7 @@ report.exclude_also = [
 [tool.mypy]
 files = ["src/mqt", "test/python", "noxfile.py"]
 mypy_path = ["$MYPY_CONFIG_FILE_DIR/src"]
-python_version = "3.8"
+python_version = "3.9"
 warn_unused_configs = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 strict = true
@@ -305,7 +303,7 @@ build = "cp3*"
 skip = "*-musllinux*"
 archs = "auto64"
 test-command = "python -c \"from mqt import qmap\""
-test-skip = ["cp38-macosx_arm64", "cp313*"] # skip testing on Python 3.13 until our dependencies are ready
+test-skip = ["cp313*"] # skip testing on Python 3.13 until our dependencies are ready
 build-frontend = "build[uv]"
 free-threaded-support = true
 manylinux-x86_64-image = "manylinux_2_28"

src/mqt/qmap/subarchitectures.py

@@ -8,7 +8,7 @@
 import pickle
 from itertools import combinations
 from pathlib import Path
-from typing import TYPE_CHECKING, Dict, Optional, Set, Tuple  # noqa: TID251
+from typing import TYPE_CHECKING, Optional
 
 from ._compat.importlib import resources
 
@@ -29,7 +29,7 @@
 with contextlib.suppress(TypeError):
     Graph: TypeAlias = rx.PyGraph[int, Optional[int]]
 
-PartialOrder: TypeAlias = Dict[Tuple[int, int], Set[Tuple[int, int]]]
+PartialOrder: TypeAlias = dict[tuple[int, int], set[tuple[int, int]]]
 
 #: Architectures for which precomputed orderings are available
 precomputed_backends = ["rigetti_16", "ibm_guadalupe_16"]

src/mqt/qmap/visualization/visualize_search_graph.py

@@ -9,13 +9,13 @@
 from dataclasses import dataclass
 from pathlib import Path
 from random import shuffle
-from typing import TYPE_CHECKING, Literal, Tuple, TypedDict, Union
+from typing import TYPE_CHECKING, Literal, TypedDict, Union
 
 if TYPE_CHECKING:
     from .._compat.typing import TypeAlias
 
-    Position: TypeAlias = Tuple[float, float]
-    Colorscale: TypeAlias = Union[str, Sequence[str], Sequence[Tuple[float, str]]]
+    Position: TypeAlias = tuple[float, float]
+    Colorscale: TypeAlias = Union[str, Sequence[str], Sequence[tuple[float, str]]]
 
     class _ActiveTraceIndices(TypedDict):
         search_edges: list[int]