Drop support for EOL Python 3.7 and 3.8

.github/workflows/tests.yml

@@ -13,9 +13,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
+        python-version: ['pypy-3.9', '3.9', '3.10', '3.11', '3.12', '3.13-dev']
         os: [ubuntu-latest, macos-latest, windows-latest]
-    continue-on-error: ${{ matrix.python-version == '3.12-dev' }}
+    continue-on-error: ${{ matrix.python-version == '3.13-dev' }}
 
     steps:
     - uses: actions/checkout@v3
@@ -29,15 +29,15 @@ jobs:
       run: |
         pip install . -r tests/requirements.txt pre-commit
     - name: Linters
-      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.7'
+      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12'
       run: |
         pre-commit run -a
     - name: Test with pytest
       run: |
         pytest --cov --cov-fail-under=100
 
     - name: Report coverage
-      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.7'
+      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12'
       uses: codecov/codecov-action@v2
 
   pypi-publish:
@@ -49,7 +49,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v3
       with:
-        python-version: '3.7'
+        python-version: '3.12'
     - name: Install build and publish tools
       run: |
         pip install build twine

pyproject.toml

@@ -10,21 +10,16 @@ authors = [
     { name = "Taneli Hukkinen", email = "hukkin@users.noreply.github.com" },
 ]
 license = { file = "LICENSE" }
-requires-python = ">=3.7"
+requires-python = ">=3.9"
 dependencies = [
     "python-dotenv >=0.10.3",
-    "typing-extensions >=3.7.4; python_version < '3.8'",
 ]
 readme = "README.md"
 classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Natural Language :: English",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Typing :: Typed",
 ]

src/typenv/__init__.py

@@ -8,17 +8,13 @@
 import json
 import os
 import string
-import sys
 from types import MappingProxyType
 import typing
 from typing import Any, NamedTuple, TypeVar, Union
 
 import dotenv
 
-if sys.version_info < (3, 8):  # pragma: no cover
-    from typing_extensions import Literal
-else:  # pragma: no cover
-    from typing import Literal
+from typing import Literal
 
 
 _EMPTY_MAP: MappingProxyType = MappingProxyType({})
@@ -73,8 +69,7 @@ def _cast_bytes(value: str) -> bytes:
 
     For now this only deals with hex encoded strings.
     """
-    value = value.lower()
-    value = _removeprefix(value, "0x")
+    value = value.lower().removeprefix("0x")
     if len(value) % 2:
         value = "0" + value
     return bytes.fromhex(value)
@@ -434,11 +429,3 @@ def _validate_name(self, name: _Str) -> None:
             raise ValueError(
                 f'Invalid name "{name}": Environment variable name can not start with a number'
             )
-
-
-# TODO: replace this with stdlib implementation once min Python version
-#       is 3.9
-def _removeprefix(string: str, prefix: str) -> str:
-    if prefix and string.startswith(prefix):
-        return string[len(prefix) :]
-    return string