Add more linting

.pre-commit-config.yaml

@@ -35,7 +35,7 @@ repos:
       - id: black
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.207
+    rev: v0.0.237
     hooks:
       - id: ruff
         args: ["--fix"]

docs/conf.py

@@ -15,6 +15,8 @@
 import os
 import shutil
 
+from jupyter_core.version import __version__, version_info
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -61,11 +63,9 @@
 
 # General information about the project.
 project = "jupyter_core"
-copyright = "2015, Jupyter Development Team"
+copyright = "2015, Jupyter Development Team"  # noqa
 author = "Jupyter Development Team"
 
-from jupyter_core.version import __version__, version_info
-
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.

jupyter_core/command.py

@@ -141,10 +141,12 @@ def _jupyter_abspath(subcommand):
     jupyter_subcommand = f"jupyter-{subcommand}"
     abs_path = which(jupyter_subcommand, path=search_path)
     if abs_path is None:
-        raise Exception(f"\nJupyter command `{jupyter_subcommand}` not found.")
+        msg = f"\nJupyter command `{jupyter_subcommand}` not found."
+        raise Exception(msg)
 
     if not os.access(abs_path, os.X_OK):
-        raise Exception(f"\nJupyter command `{jupyter_subcommand}` is not executable.")
+        msg = f"\nJupyter command `{jupyter_subcommand}` is not executable."
+        raise Exception(msg)
 
     return abs_path
 
@@ -215,10 +217,11 @@ def _evaluate_argcomplete(parser: JupyterParser) -> List[str]:
         # traitlets >= 5.8 not available, just try to complete this without
         # worrying about subcommands
         parser.argcomplete()
-    raise AssertionError("Control flow should not reach end of autocomplete()")
+    msg = "Control flow should not reach end of autocomplete()"
+    raise AssertionError(msg)
 
 
-def main() -> None:
+def main() -> None:  # noqa
     """The command entry point."""
     parser = jupyter_parser()
     argv = sys.argv

jupyter_core/migrate.py

@@ -27,7 +27,7 @@
 import os
 import re
 import shutil
-from datetime import datetime
+from datetime import datetime, timezone
 
 from traitlets.config.loader import JSONFileConfigLoader, PyFileConfigLoader
 from traitlets.log import get_logger
@@ -176,12 +176,10 @@ def migrate_static_custom(src, dst):
     if not custom_js_empty or not custom_css_empty:
         ensure_dir_exists(dst)
 
-    if not custom_js_empty:
-        if migrate_file(custom_js, pjoin(dst, "custom.js")):
-            migrated = True
-    if not custom_css_empty:
-        if migrate_file(custom_css, pjoin(dst, "custom.css")):
-            migrated = True
+    if not custom_js_empty and migrate_file(custom_js, pjoin(dst, "custom.js")):
+        migrated = True
+    if not custom_css_empty and migrate_file(custom_css, pjoin(dst, "custom.css")):
+        migrated = True
 
     return migrated
 
@@ -225,9 +223,8 @@ def migrate():
     for src_t, dst_t in migrations.items():
         src = src_t.format(**env)
         dst = dst_t.format(**env)
-        if os.path.exists(src):
-            if migrate_one(src, dst):
-                migrated = True
+        if os.path.exists(src) and migrate_one(src, dst):
+            migrated = True
 
     for name in config_migrations:
         if migrate_config(name, env):
@@ -236,14 +233,13 @@ def migrate():
     custom_src = custom_src_t.format(**env)
     custom_dst = custom_dst_t.format(**env)
 
-    if os.path.exists(custom_src):
-        if migrate_static_custom(custom_src, custom_dst):
-            migrated = True
+    if os.path.exists(custom_src) and migrate_static_custom(custom_src, custom_dst):
+        migrated = True
 
     # write a marker to avoid re-running migration checks
     ensure_dir_exists(env["jupyter_config"])
     with open(os.path.join(env["jupyter_config"], "migrated"), "w", encoding="utf-8") as f:
-        f.write(datetime.utcnow().isoformat())
+        f.write(datetime.now(tz=timezone.utc).isoformat())
 
     return migrated
 

jupyter_core/paths.py

@@ -81,15 +81,15 @@ def _do_i_own(path: str) -> bool:
     try:
         return p.owner() == os.getlogin()
     except Exception:
-        pass
+        pass  # noqa
 
     if hasattr(os, 'geteuid'):
         try:
             st = p.stat()
             return st.st_uid == os.geteuid()
         except (NotImplementedError, OSError):
             # geteuid not always implemented
-            pass
+            pass  # noqa
 
     # no ownership checks worked, check write access
     return os.access(p, os.W_OK)
@@ -207,10 +207,10 @@ def jupyter_runtime_dir() -> str:
 else:
     deprecation(
         "Jupyter is migrating its paths to use standard platformdirs\n"
-        + "given by the platformdirs library.  To remove this warning and\n"
-        + "see the appropriate new directories, set the environment variable\n"
-        + "`JUPYTER_PLATFORM_DIRS=1` and then run `jupyter --paths`.\n"
-        + "The use of platformdirs will be the default in `jupyter_core` v6"
+        "given by the platformdirs library.  To remove this warning and\n"
+        "see the appropriate new directories, set the environment variable\n"
+        "`JUPYTER_PLATFORM_DIRS=1` and then run `jupyter --paths`.\n"
+        "The use of platformdirs will be the default in `jupyter_core` v6"
     )
     if os.name == "nt":
         programdata = os.environ.get("PROGRAMDATA", None)
@@ -261,10 +261,7 @@ def jupyter_path(*subdirs: str) -> List[str]:
         # Check if site.getuserbase() exists to be compatible with virtualenv,
         # which often does not have this method.
         userbase: Optional[str]
-        if hasattr(site, "getuserbase"):
-            userbase = site.getuserbase()
-        else:
-            userbase = site.USER_BASE
+        userbase = site.getuserbase() if hasattr(site, "getuserbase") else site.USER_BASE
 
         if userbase:
             userdir = os.path.join(userbase, "share", "jupyter")
@@ -334,10 +331,7 @@ def jupyter_config_path() -> List[str]:
         userbase: Optional[str]
         # Check if site.getuserbase() exists to be compatible with virtualenv,
         # which often does not have this method.
-        if hasattr(site, "getuserbase"):
-            userbase = site.getuserbase()
-        else:
-            userbase = site.USER_BASE
+        userbase = site.getuserbase() if hasattr(site, "getuserbase") else site.USER_BASE
 
         if userbase:
             userdir = os.path.join(userbase, "etc", "jupyter")
@@ -439,7 +433,7 @@ def is_file_hidden_posix(abs_path: str, stat_res: Optional[Any] = None) -> bool:
             raise
 
     # check that dirs can be listed
-    if stat.S_ISDIR(stat_res.st_mode):  # type:ignore[misc]
+    if stat.S_ISDIR(stat_res.st_mode):  # type:ignore[misc]  # noqa
         # use x-access, not actual listing, in case of slow/large listings
         if not os.access(abs_path, os.X_OK | os.R_OK):
             return True
@@ -457,7 +451,7 @@ def is_file_hidden_posix(abs_path: str, stat_res: Optional[Any] = None) -> bool:
     is_file_hidden = is_file_hidden_posix
 
 
-def is_hidden(abs_path: str, abs_root: str = "") -> bool:
+def is_hidden(abs_path: str, abs_root: str = "") -> bool:  # noqa
     """Is a file hidden or contained in a hidden directory?
 
     This will start with the rightmost path element and work backwards to the
@@ -554,7 +548,7 @@ def win32_restrict_file_to_user(fname: str) -> None:
     win32security.SetFileSecurity(fname, win32security.DACL_SECURITY_INFORMATION, sd)
 
 
-def _win32_restrict_file_to_user_ctypes(fname: str) -> None:
+def _win32_restrict_file_to_user_ctypes(fname: str) -> None:  # noqa
     """Secure a windows file to read-only access for the user.
 
     Follows guidance from win32 library creator:
@@ -992,16 +986,17 @@ def secure_write(fname: str, binary: bool = False) -> Iterator[Any]:
         if os.name != "nt":
             # Enforce that the file got the requested permissions before writing
             file_mode = get_file_mode(fname)
-            if 0o0600 != file_mode:
+            if file_mode != 0o0600:  # noqa
                 if allow_insecure_writes:
                     issue_insecure_write_warning()
                 else:
-                    raise RuntimeError(
+                    msg = (
                         "Permissions assignment failed for secure file: '{file}'."
                         " Got '{permissions}' instead of '0o0600'.".format(
                             file=fname, permissions=oct(file_mode)
                         )
                     )
+                    raise RuntimeError(msg)
         yield f
 
 

jupyter_core/tests/test_command.py

@@ -44,7 +44,7 @@ def get_jupyter_output(cmd):
     if not isinstance(cmd, list):
         cmd = [cmd]
     return (
-        check_output([sys.executable, "-m", "jupyter_core"] + cmd, stderr=PIPE)
+        check_output([sys.executable, "-m", "jupyter_core", *cmd], stderr=PIPE)
         .decode("utf8")
         .strip()
     )
@@ -108,7 +108,7 @@ def test_paths_json():
 
 
 def test_paths_debug():
-    vars = [
+    names = [
         "JUPYTER_PREFER_ENV_PATH",
         "JUPYTER_NO_CONFIG",
         "JUPYTER_CONFIG_PATH",
@@ -118,12 +118,12 @@ def test_paths_debug():
         "JUPYTER_RUNTIME_DIR",
     ]
     output = get_jupyter_output(["--paths", "--debug"])
-    for v in vars:
+    for v in names:
         assert f"{v} is not set" in output
 
-    with patch.dict("os.environ", [(v, "y") for v in vars]):
+    with patch.dict("os.environ", [(v, "y") for v in names]):
         output = get_jupyter_output(["--paths", "--debug"])
-    for v in vars:
+    for v in names:
         assert f"{v} is set" in output
 
 
@@ -161,17 +161,16 @@ def test_subcommand_list(tmpdir):
     def get_path(dummy):
         return str(c)
 
-    with patch.object(sysconfig, "get_path", get_path):
-        with patch.dict("os.environ", {"PATH": path}):
-            subcommands = list_subcommands()
-            assert subcommands == [
-                "babel-fish",
-                "baz",
-                "bop",
-                "foo",
-                "xyz",
-                "yo-eyropa-ganymyde-callysto",
-            ]
+    with patch.object(sysconfig, "get_path", get_path), patch.dict("os.environ", {"PATH": path}):
+        subcommands = list_subcommands()
+        assert subcommands == [
+            "babel-fish",
+            "baz",
+            "bop",
+            "foo",
+            "xyz",
+            "yo-eyropa-ganymyde-callysto",
+        ]
 
 
 skip_darwin = pytest.mark.skipif(sys.platform == "darwin", reason="Fails on macos")

jupyter_core/tests/test_paths.py

@@ -548,7 +548,7 @@ def check_user_only_permissions(fname):
         assert "administrators" in permissions
         assert permissions["administrators"] == {"f"}
         assert "everyone" not in permissions
-        assert len(permissions) == 2
+        assert len(permissions) == 2  # noqa
 
     directory = tempfile.mkdtemp()
     fname = os.path.join(directory, "check_perms")
@@ -570,16 +570,16 @@ def test_secure_write_unix():
         with secure_write(fname) as f:
             f.write("test 1")
         mode = os.stat(fname).st_mode
-        assert 0o0600 == (stat.S_IMODE(mode) & 0o7677)  # tolerate owner-execute bit
+        assert 0o0600 == (stat.S_IMODE(mode) & 0o7677)  # noqa # tolerate owner-execute bit
         with open(fname, encoding="utf-8") as f:
             assert f.read() == "test 1"
 
         # Try changing file permissions ahead of time
-        os.chmod(fname, 0o755)
+        os.chmod(fname, 0o755)  # noqa
         with secure_write(fname) as f:
             f.write("test 2")
         mode = os.stat(fname).st_mode
-        assert 0o0600 == (stat.S_IMODE(mode) & 0o7677)  # tolerate owner-execute bit
+        assert 0o0600 == (stat.S_IMODE(mode) & 0o7677)  # noqa # tolerate owner-execute bit
         with open(fname, encoding="utf-8") as f:
             assert f.read() == "test 2"
     finally:

jupyter_core/troubleshoot.py

@@ -45,7 +45,7 @@ def get_data() -> Dict[str, Any]:
     return env
 
 
-def main() -> None:
+def main() -> None:  # noqa
     """
     print out useful info
     """

jupyter_core/utils/__init__.py

@@ -80,10 +80,7 @@ def deprecation(message: str, internal: Union[str, List[str]] = "jupyter_core/")
     we know that our internal code is calling out to another library.
     """
     _internal: List[str]
-    if isinstance(internal, str):
-        _internal = [internal]
-    else:
-        _internal = internal
+    _internal = [internal] if isinstance(internal, str) else internal
 
     # stack level of the first external frame from here
     stacklevel = _external_stacklevel(_internal)
@@ -110,7 +107,7 @@ def _close(self):
 
     def _runner(self):
         loop = self.__io_loop
-        assert loop is not None
+        assert loop is not None  # noqa
         try:
             loop.run_forever()
         finally:
@@ -146,7 +143,8 @@ def run_sync(coro: Callable[..., Awaitable[T]]) -> Callable[..., T]:
         Whatever the coroutine-function returns.
     """
 
-    assert inspect.iscoroutinefunction(coro)
+    if not inspect.iscoroutinefunction(coro):
+        raise AssertionError
 
     def wrapped(*args, **kwargs):
         name = threading.current_thread().name

jupyter_core/version.py

@@ -10,7 +10,7 @@
 # Build up version_info tuple for backwards compatibility
 pattern = r"(?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)(?P<rest>.*)"
 match = re.match(pattern, __version__)
-assert match is not None
+assert match is not None  # noqa
 parts: List[object] = [int(match[part]) for part in ["major", "minor", "patch"]]
 if match["rest"]:
     parts.append(match["rest"])