build: Update minimum Python version to 3.9

Author: knopki

pyproject.toml

@@ -24,14 +24,14 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
-    "Framework :: AiiDA"
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Framework :: AiiDA",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "aiohttp~=3.8",
     "asyncssh~=2.11",
@@ -46,7 +46,6 @@ dependencies = [
     "python-daemon~=2.3",
     "typing-extensions >= 4.2.0; python_version < '3.11'",
     "upcloud_api~=2.0",
-    "importlib_metadata; python_version < '3.8'",
 ]
 
 [project.optional-dependencies]
@@ -96,7 +95,7 @@ remove-duplicate-keys = true
 remove-unused-variables = true
 
 [tool.black]
-target-version = ['py38', 'py39', 'py310', 'py311']
+target-version = ['py39', 'py310', 'py311', 'py312', 'py313']
 
 
 [tool.commitizen]
@@ -111,7 +110,7 @@ changelog_incremental = true
 
 [tool.isort]
 profile = "black"
-py_version = 38
+py_version = 39
 
 [tool.pylint.MASTER]
 load-plugins=[
@@ -120,7 +119,7 @@ load-plugins=[
 
 [tool.pylint.main]
 jobs = 0
-py-version = "3.8"
+py-version = "3.9"
 recursive = true
 suggestion-mode = true
 

yascheduler/__init__.py

@@ -1,14 +1,9 @@
-import sys
+import importlib.metadata
 
 from .client import Yascheduler
 from .variables import CONFIG_FILE, LOG_FILE, PID_FILE
 
-if sys.version_info < (3, 8):
-    import importlib_metadata
-else:
-    import importlib.metadata as importlib_metadata
-
-__version__ = importlib_metadata.version("yascheduler")
+__version__ = importlib.metadata.version("yascheduler")
 __all__ = [
     "CONFIG_FILE",
     "LOG_FILE",