build: support only python 3.11 and higher

.github/workflows/build-test-codecov.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [3.8, 3.9, "3.10", 3.11]
+        python-version: [3.11, 3.12]
 
 
     steps:

.github/workflows/test-release-candidate.yaml

@@ -54,7 +54,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         # windows-latest !=> gives error in 'if' statetement
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.11", "3.12"]
     env:
       OS: ${{ matrix.os }}
       PYTHON: ${{ matrix.python-version }}

pyproject.toml

@@ -17,9 +17,6 @@ classifiers = [
 	"Natural Language :: English",
 	"Programming Language :: Python",
 	"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",
 	"Programming Language :: Python :: Implementation :: CPython",
 	"Programming Language :: Python :: Implementation :: PyPy",

src/raman_fitting/__init__.py

@@ -64,17 +64,17 @@
 # add the handlers to the logger
 logger.addHandler(ch)
 
-# This code is written for Python 3.
-if sys.version_info.major < 3 and sys.version_info.minor < 7:
-    logger.error(f"{__package_name__} requires Python 3.7 or higher.")
+# This code is written for Python 3.11 and higher
+if sys.version_info.major < 3 and sys.version_info.minor < 11:
+    logger.error(f"{__package_name__} requires Python 3.11 or higher.")
     sys.exit(1)
 
 # Let users know if they're missing any hard dependencies
 hard_dependencies = ("numpy", "pandas", "scipy", "matplotlib", "lmfit")
 soft_dependencies = {}
 missing_dependencies = []
 
-import importlib
+import importlib.util
 
 for dependency in hard_dependencies:
     if not importlib.util.find_spec(dependency):