Python3.9 is EOL

.github/workflows/python-package.yml

@@ -13,8 +13,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: "3.9"
-            tox-env: py39
           - python-version: "3.10"
             tox-env: py310
           - python-version: "3.11"

.python-versions

@@ -1,4 +1,3 @@
-3.9
 3.10
 3.11
 3.12

README.md

@@ -14,7 +14,7 @@ learning training with batteries included. It supports
 ## Dependency
 
 - HDFS client and libhdfs for HDFS access
-- CPython >= 3.9
+- CPython >= 3.10
 
 ## Installation and Document build
 

pfio/v2/pathlib.py

@@ -47,13 +47,6 @@ def _has_directory_feature(fs: FS) -> bool:
         return True
 
 
-def _removeprefix(text: str, prefix: str) -> str:
-    # NOTE: `str.removeprefix` supports version 3.9 or higher.
-    if text.startswith(prefix):
-        return text[len(prefix):]
-    return text
-
-
 def _compare_fs(lhs: FS, rhs: FS) -> bool:
     if type(lhs) is type(rhs):
         assert isinstance(lhs.cwd, str)
@@ -254,7 +247,7 @@ def as_uri(self) -> str:
 
             prefix = self._fs.cwd
             assert isinstance(prefix, str)
-            key = _removeprefix(self.as_posix(), self.sep)
+            key = self.as_posix().removeprefix(self.sep)
 
             parsed = ParseResult(
                 scheme=self.scheme,
@@ -273,11 +266,6 @@ def is_absolute(self) -> bool:
         return self._pure.is_absolute()
 
     def is_relative_to(self, *other: Union[str, PathLike]) -> bool:
-        if python_version_info.minor < 9:
-            raise NotImplementedError(
-                "`is_relative_to()` supports python 3.9 or higher"
-            )
-
         # Same rationale as `relative_to`: unwrap pfio PurePath so
         # 3.14's stdlib does not skip its `PurePosixPath` coercion,
         # and shim the multi-arg form that stdlib removed in 3.14.
@@ -375,14 +363,7 @@ def with_name(self: SelfPurePathType, name: str) -> SelfPurePathType:
         return self.with_segments(self._pure.with_name(name))
 
     def with_stem(self: SelfPurePathType, stem: str) -> SelfPurePathType:
-        if python_version_info.minor < 9:
-            raise NotImplementedError(
-                "`with_stem()` supports python 3.9 or higher"
-            )
-        else:
-            return self.with_segments(
-                self._pure.with_stem(stem)  # type: ignore
-            )
+        return self.with_segments(self._pure.with_stem(stem))
 
     def with_suffix(self: SelfPurePathType, suffix: str) -> SelfPurePathType:
         return self.with_segments(self._pure.with_suffix(suffix))
@@ -421,7 +402,7 @@ def __init__(
         super().__init__(*args, fs=fs, scheme=scheme)
 
     def _as_relative_to_fs(self) -> str:
-        return _removeprefix(self.as_posix(), self.anchor)
+        return self.as_posix().removeprefix(self.anchor)
 
     # ---------------------------------------
     # pathlib.Path compatible classmethods
@@ -622,13 +603,13 @@ def rename(
             #       we implemented by `copy` + `remove`.
             #       it is generic but poor performance...
             target = self.with_segments(
-                _removeprefix(str(target), self.anchor)
+                str(target).removeprefix(self.anchor)
             )
             copy(self, target)
             unlink(self)
         else:
             target = (
-                _removeprefix(target.as_posix(), self.anchor)
+                target.as_posix().removeprefix(self.anchor)
                 if isinstance(target, PurePath)
                 else target
             )
@@ -660,7 +641,7 @@ def rglob(
         case_sensitive: Optional[bool] = None,
     ) -> Iterator[SelfPathType]:
         return self.glob(
-            joinpath("**", _removeprefix(pattern, self.sep)),
+            joinpath("**", pattern.removeprefix(self.sep)),
             case_sensitive=case_sensitive,
         )
 

pyproject.toml

@@ -18,15 +18,14 @@ classifiers = [
     "Intended Audience :: Developers",
     "Operating System :: POSIX",
     "Operating System :: POSIX :: Linux",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
     "Topic :: System :: Filesystems",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "boto3",
     "deprecation",
@@ -78,7 +77,7 @@ module = [
 ignore_missing_imports = true
 
 [tool.tox]
-env_list = ["py39", "py310", "py311", "py312", "py313", "py314", "doc"]
+env_list = ["py310", "py311", "py312", "py313", "py314", "doc"]
 
 [tool.tox.env_run_base]
 runner = "uv-venv-runner"

tests/v2_tests/test_pathlib.py

@@ -12,8 +12,7 @@
 from moto import mock_aws
 
 from pfio.v2 import Local, from_url
-from pfio.v2.pathlib import (Path, PurePath, _has_directory_feature,
-                             _removeprefix, unlink)
+from pfio.v2.pathlib import Path, PurePath, _has_directory_feature, unlink
 
 
 class TemporaryS3Bucket:
@@ -423,7 +422,7 @@ def test_purepath_compatible_methods(
             unparsed = ParseResult(
                 parsed.scheme,
                 parsed.netloc,
-                os.path.join(parsed.path, _removeprefix(path, "/")),
+                os.path.join(parsed.path, path.removeprefix("/")),
                 parsed.params,
                 parsed.query,
                 parsed.fragment,
@@ -476,7 +475,7 @@ def test_purepath_compatible_methods(
 )
 def test_path_stat(storage: str, path: str) -> None:
     with from_url(url=storage) as fs:
-        p = Path(_removeprefix(path, "/"), fs=fs)
+        p = Path(path.removeprefix("/"), fs=fs)
         if p.is_file():
             stat = p.stat()
             assert stat.size > 0 or stat.last_modified is not None