Drop Python 3.7 and 3.8 support (#22)

Author: basnijholt

Diff for: markdown_code_runner.py

@@ -36,6 +36,7 @@
 ```
 Which will similarly print the output of the code block between next to the output markers.
 """
+
 from __future__ import annotations
 
 import argparse
@@ -44,30 +45,15 @@
 import os
 import re
 import subprocess
-import sys
 from dataclasses import dataclass, field
+from importlib.metadata import PackageNotFoundError, version
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
-
-if TYPE_CHECKING:
-    try:
-        from typing import Literal  # type: ignore[attr-defined]
-    except ImportError:
-        from typing_extensions import Literal
-
-
-if sys.version_info >= (3, 8):  # pragma: no cover
-    from importlib.metadata import PackageNotFoundError, version
-
-    try:
-        __version__ = version("markdown-code-runner")
-    except PackageNotFoundError:
-        __version__ = "unknown"
-else:  # pragma: no cover
-    import pkg_resources
-
-    __version__ = pkg_resources.get_distribution("markdown-code-runner").version
+from typing import Any, Literal
 
+try:
+    __version__ = version("markdown-code-runner")
+except PackageNotFoundError:  # pragma: no cover
+    __version__ = "unknown"
 
 DEBUG: bool = os.environ.get("DEBUG", "0") == "1"
 
@@ -124,7 +110,7 @@ def remove_md_comment(commented_text: str) -> str:
 def execute_code(
     code: list[str],
     context: dict[str, Any] | None = None,
-    language: Literal["python", "bash"] = None,  # type: ignore[name-defined]
+    language: Literal["python", "bash"] | None = None,  # type: ignore[name-defined]
     *,
     output_file: str | Path | None = None,
     verbose: bool = False,
@@ -242,7 +228,7 @@ def _process_start_markers(self, line: str) -> None:
                 # reset output in case previous output wasn't displayed
                 self.output = None
                 self.backtick_options = _extract_backtick_options(line)
-                self.section, _ = marker.rsplit(":", 1)
+                self.section, _ = marker.rsplit(":", 1)  # type: ignore[assignment]
                 return
 
     def _process_output_start(self, line: str) -> None:
@@ -268,7 +254,7 @@ def _process_code(
         self,
         line: str,
         end_marker: str,
-        language: str,
+        language: Literal["python", "bash"],
         *,
         remove_comment: bool = False,
         verbose: bool,
@@ -293,7 +279,7 @@ def _process_comment_code(self, line: str, *, verbose: bool) -> None:
         self._process_code(
             line,
             "code:comment:end",
-            language,
+            language,  # type: ignore[arg-type]
             remove_comment=True,
             verbose=verbose,
         )

Diff for: pyproject.toml

@@ -6,10 +6,8 @@ build-backend = "setuptools.build_meta"
 name = "markdown-code-runner"
 description = "Automatically execute code blocks within a Markdown file and update the output in-place"
 authors = [{ name = "Bas Nijholt", email = "[email protected]" }]
-dependencies = [
-    "typing-extensions; python_version < '3.8'",
-]
-requires-python = ">=3.7"
+dependencies = []
+requires-python = ">=3.9"
 dynamic = ["version"]
 
 [project.readme]
@@ -51,7 +49,7 @@ line_length = 88
 
 [tool.ruff]
 line-length = 150
-target-version = "py37"
+target-version = "py39"
 select = ["ALL"]
 ignore = [
     "T20",     # flake8-print
@@ -73,4 +71,4 @@ ignore = [
 max-complexity = 18
 
 [tool.mypy]
-python_version = "3.7"
+python_version = "3.9"