Make the code linter happy

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: ctrueden

src/scyjava/__init__.py

@@ -84,8 +84,9 @@
 """
 
 import logging
+from collections.abc import Callable
 from functools import lru_cache
-from typing import Any, Callable, Dict
+from typing import Any
 
 from . import config, inspect
 from ._arrays import is_arraylike, is_memoryarraylike, is_xarraylike
@@ -112,7 +113,7 @@
     jreflect,
     jsource,
 )
-from ._jvm import (  # noqa: F401
+from ._jvm import (
     available_processors,
     gc,
     is_awt_initialized,
@@ -161,7 +162,7 @@
 _logger = logging.getLogger(__name__)
 
 # Set of module properties
-_CONSTANTS: Dict[str, Callable] = {}
+_CONSTANTS: dict[str, Callable] = {}
 
 
 def constant(func: Callable[[], Any], cache=True) -> Callable[[], Any]:

src/scyjava/_convert.py

@@ -7,9 +7,10 @@
 import logging
 import math
 from bisect import insort
+from collections.abc import Callable
 from importlib.util import find_spec
 from pathlib import Path
-from typing import Any, Callable, Dict, List, NamedTuple
+from typing import Any, NamedTuple
 
 from jpype import JBoolean, JByte, JChar, JDouble, JFloat, JInt, JLong, JShort
 
@@ -52,14 +53,14 @@ class Converter(NamedTuple):
     priority: float = Priority.NORMAL
     name: str = "<unnamed>"
 
-    def supports(self, obj: Any, **hints: Dict) -> bool:
+    def supports(self, obj: Any, **hints: dict) -> bool:
         return (
             self.predicate(obj, **hints)
             if _has_kwargs(self.predicate)
             else self.predicate(obj)
         )
 
-    def convert(self, obj: Any, **hints: Dict) -> Any:
+    def convert(self, obj: Any, **hints: dict) -> Any:
         return (
             self.converter(obj, **hints)
             if _has_kwargs(self.converter)
@@ -82,7 +83,7 @@ def __str__(self):
         return self.name
 
 
-def _convert(obj: Any, converters: List[Converter], **hints: Dict) -> Any:
+def _convert(obj: Any, converters: list[Converter], **hints: dict) -> Any:
     # NB: The given converters are assumed to be sorted ascending by priority,
     # meaning lower-priority items appear earlier than higher-priority ones.
     # But we want to try the higher priority converters first, so we
@@ -132,7 +133,7 @@ def _convertIterable(obj: collections.abc.Iterable):
     return jlist
 
 
-java_converters: List[Converter] = []
+java_converters: list[Converter] = []
 
 
 def add_java_converter(converter: Converter) -> None:
@@ -143,7 +144,7 @@ def add_java_converter(converter: Converter) -> None:
     insort(java_converters, converter)
 
 
-def to_java(obj: Any, **hints: Dict) -> Any:
+def to_java(obj: Any, **hints: dict) -> Any:
     """
     Recursively convert a Python object to a Java object.
 
@@ -197,7 +198,7 @@ def to_java(obj: Any, **hints: Dict) -> Any:
     return _convert(obj, java_converters, **hints)
 
 
-def _stock_java_converters() -> List[Converter]:
+def _stock_java_converters() -> list[Converter]:
     """
     Construct the Python-to-Java converters supported out of the box.
     :return: A list of Converters
@@ -366,7 +367,7 @@ def _jstr(data):
     if isinstance(data, JavaObject):
         return str(data)
     # NB: We want Python strings to render in single quotes.
-    return "{!r}".format(data)
+    return f"{data!r}"
 
 
 class JavaObject:
@@ -526,7 +527,7 @@ def __str__(self):
         return "{" + ", ".join(_jstr(v) for v in self) + "}"
 
 
-py_converters: List[Converter] = []
+py_converters: list[Converter] = []
 
 
 def add_py_converter(converter: Converter) -> None:
@@ -566,13 +567,13 @@ def to_python(data: Any, gentle: bool = False) -> Any:
     start_jvm()
     try:
         return _convert(data, py_converters)
-    except TypeError as exc:
+    except TypeError:
         if gentle:
             return data
-        raise exc
+        raise
 
 
-def _stock_py_converters() -> List:
+def _stock_py_converters() -> list:
     """
     Construct the Java-to-Python converters supported out of the box.
     :return: A list of Converters
@@ -842,7 +843,7 @@ def _is_table(obj: Any) -> bool:
     """Check if obj is a table."""
     try:
         return jinstance(obj, "org.scijava.table.Table")
-    except BaseException:
+    except BaseException:  # noqa: BLE001
         # No worries if scijava-table is not available.
         return False
 
@@ -851,7 +852,7 @@ def _convert_table(obj: Any):
     """Convert obj to a table."""
     try:
         return _table_to_pandas(obj)
-    except BaseException:
+    except BaseException:  # noqa: BLE001
         # No worries if scijava-table is not available.
         return None
 
@@ -894,8 +895,8 @@ def _pandas_to_table(df):
         elif table_type.name.startswith("bool"):
             TableClass = jimport("org.scijava.table.DefaultBoolTable")
         else:
-            msg = "The type '{}' is not supported.".format(table_type.name)
-            raise Exception(msg)
+            msg = f"The type '{table_type.name}' is not supported."
+            raise ValueError(msg)
 
     table = TableClass(*df.shape[::-1])
 
@@ -913,51 +914,51 @@ def _pandas_to_table(df):
 # fmt: off
 class _JavaClasses(JavaClasses):
     @JavaClasses.java_import
-    def Boolean(self):       return "java.lang.Boolean"        # noqa: E272
+    def Boolean(self):       return "java.lang.Boolean"
     @JavaClasses.java_import
-    def Byte(self):          return "java.lang.Byte"           # noqa: E272
+    def Byte(self):          return "java.lang.Byte"
     @JavaClasses.java_import
-    def Character(self):     return "java.lang.Character"      # noqa: E272
+    def Character(self):     return "java.lang.Character"
     @JavaClasses.java_import
-    def Double(self):        return "java.lang.Double"         # noqa: E272
+    def Double(self):        return "java.lang.Double"
     @JavaClasses.java_import
-    def Float(self):         return "java.lang.Float"          # noqa: E272
+    def Float(self):         return "java.lang.Float"
     @JavaClasses.java_import
-    def Integer(self):       return "java.lang.Integer"        # noqa: E272
+    def Integer(self):       return "java.lang.Integer"
     @JavaClasses.java_import
-    def Iterable(self):      return "java.lang.Iterable"       # noqa: E272
+    def Iterable(self):      return "java.lang.Iterable"
     @JavaClasses.java_import
-    def Long(self):          return "java.lang.Long"           # noqa: E272
+    def Long(self):          return "java.lang.Long"
     @JavaClasses.java_import
-    def Object(self):        return "java.lang.Object"         # noqa: E272
+    def Object(self):        return "java.lang.Object"
     @JavaClasses.java_import
-    def Short(self):         return "java.lang.Short"          # noqa: E272
+    def Short(self):         return "java.lang.Short"
     @JavaClasses.java_import
-    def String(self):        return "java.lang.String"         # noqa: E272
+    def String(self):        return "java.lang.String"
     @JavaClasses.java_import
-    def BigDecimal(self):    return "java.math.BigDecimal"     # noqa: E272
+    def BigDecimal(self):    return "java.math.BigDecimal"
     @JavaClasses.java_import
-    def BigInteger(self):    return "java.math.BigInteger"     # noqa: E272
+    def BigInteger(self):    return "java.math.BigInteger"
     @JavaClasses.java_import
-    def Path(self):          return "java.nio.file.Path"       # noqa: E272
+    def Path(self):          return "java.nio.file.Path"
     @JavaClasses.java_import
-    def Paths(self):         return "java.nio.file.Paths"      # noqa: E272
+    def Paths(self):         return "java.nio.file.Paths"
     @JavaClasses.java_import
-    def ArrayList(self):     return "java.util.ArrayList"      # noqa: E272
+    def ArrayList(self):     return "java.util.ArrayList"
     @JavaClasses.java_import
-    def Collection(self):    return "java.util.Collection"     # noqa: E272
+    def Collection(self):    return "java.util.Collection"
     @JavaClasses.java_import
-    def Iterator(self):      return "java.util.Iterator"       # noqa: E272
+    def Iterator(self):      return "java.util.Iterator"
     @JavaClasses.java_import
-    def LinkedHashMap(self): return "java.util.LinkedHashMap"  # noqa: E272
+    def LinkedHashMap(self): return "java.util.LinkedHashMap"
     @JavaClasses.java_import
-    def LinkedHashSet(self): return "java.util.LinkedHashSet"  # noqa: E272
+    def LinkedHashSet(self): return "java.util.LinkedHashSet"
     @JavaClasses.java_import
-    def List(self):          return "java.util.List"           # noqa: E272
+    def List(self):          return "java.util.List"
     @JavaClasses.java_import
-    def Map(self):           return "java.util.Map"            # noqa: E272
+    def Map(self):           return "java.util.Map"
     @JavaClasses.java_import
-    def Set(self):           return "java.util.Set"            # noqa: E272
+    def Set(self):           return "java.util.Set"
 # fmt: on
 
 

src/scyjava/_introspect.py

@@ -3,13 +3,13 @@
 class methods, fields, and source code URL.
 """
 
-from typing import Any, Dict, List
+from typing import Any
 
 from scyjava._jvm import jimport, jvm_version
-from scyjava._types import isjava, jinstance, jclass
+from scyjava._types import isjava, jclass, jinstance
 
 
-def jreflect(data, aspect: str = "all") -> List[Dict[str, Any]]:
+def jreflect(data, aspect: str = "all") -> list[dict[str, Any]]:
     """
     Use Java reflection to introspect the given Java object,
     returning a table of its available methods or fields.
@@ -91,7 +91,7 @@ def jsource(data) -> str:
         try:
             data = jimport(data)  # check if data can be imported
         except Exception as err:
-            raise ValueError(f"Not a Java object {err}")
+            raise ValueError(f"Not a Java object {err}") from err
     jcls = data if jinstance(data, "java.lang.Class") else jclass(data)
 
     if jcls.getClassLoader() is None:

src/scyjava/_jdk_fetch.py

@@ -6,7 +6,7 @@
 
 import logging
 import os
-from typing import TYPE_CHECKING, Union
+from typing import TYPE_CHECKING
 
 from jgo.exec import JavaLocator, JavaSource
 
@@ -64,7 +64,7 @@ def resolve_java(vendor: str | None = None, version: str | None = None) -> None:
     os.environ["JAVA_HOME"] = str(java_home)
 
 
-def _add_to_path(path: Union[Path, str], front: bool = False) -> None:
+def _add_to_path(path: Path | str, front: bool = False) -> None:
     """Add a path to the PATH environment variable.
 
     If front is True, the path is added to the front of the PATH.

src/scyjava/_jvm.py

@@ -8,18 +8,18 @@
 import re
 import subprocess
 import sys
-from functools import lru_cache
+from collections.abc import Sequence
+from functools import cache
 from importlib import import_module
 from pathlib import Path
-from typing import Sequence
 
+import jgo
 import jpype
 import jpype.config
-import jgo
 
 import scyjava.config
-from scyjava.config import Mode, mode
 from scyjava._jdk_fetch import resolve_java
+from scyjava.config import Mode, mode
 
 _logger = logging.getLogger(__name__)
 
@@ -176,7 +176,7 @@ def start_jvm(options: Sequence[str] | None = None) -> None:
     repositories = scyjava.config.get_repositories()
 
     # use the logger to notify user that endpoints are being added
-    _logger.debug("Adding jars from endpoints {0}".format(endpoints))
+    _logger.debug(f"Adding jars from endpoints {endpoints}")
 
     # download Java as appropriate
     resolve_java()
@@ -297,7 +297,7 @@ def shutdown_jvm() -> None:
     for callback in _shutdown_callbacks:
         try:
             callback()
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001
             _logger.error(f"Exception during shutdown callback: {e}")
 
     # dispose AWT resources if applicable
@@ -309,7 +309,7 @@ def shutdown_jvm() -> None:
     # okay to shutdown JVM
     try:
         jpype.shutdownJVM()
-    except Exception as e:
+    except Exception as e:  # noqa: BLE001
         _logger.error(f"Exception during JVM shutdown: {e}")
 
 
@@ -444,7 +444,6 @@ def when_jvm_starts(f) -> None:
         f()
     else:
         # Add function to the list of callbacks to invoke upon start_jvm().
-        global _startup_callbacks
         _startup_callbacks.append(f)
 
 
@@ -458,11 +457,10 @@ def when_jvm_stops(f) -> None:
 
     :param f: Function to invoke when scyjava.shutdown_jvm() is called.
     """
-    global _shutdown_callbacks
     _shutdown_callbacks.append(f)
 
 
-@lru_cache(maxsize=None)
+@cache
 def jimport(class_name: str):
     """
     Import a class from Java to Python.

src/scyjava/_script.py

@@ -67,7 +67,7 @@ class PythonScriptRunner:
         def apply(self, arg):
             # Copy script bindings/vars into script locals.
             script_locals = {}
-            for key in arg.vars.keys():
+            for key in arg.vars:
                 script_locals[key] = arg.vars[key]
 
             stdoutContextWriter.addScriptContext(
@@ -100,7 +100,7 @@ def apply(self, arg):
                     # See: https://docs.python.org/3/library/functions.html#exec
                     _globals = script_locals
 
-                    exec(
+                    exec(  # noqa: S102
                         compile(block, "<string>", mode="exec"), _globals, script_locals
                     )
                     if last is not None:
@@ -109,7 +109,7 @@ def apply(self, arg):
                             _globals,
                             script_locals,
                         )
-                except Exception:
+                except Exception:  # noqa: BLE001
                     error_message = traceback.format_exc()
                     error_writer = arg.scriptContext.getErrorWriter()
                     if error_writer is None:
@@ -123,11 +123,11 @@ def apply(self, arg):
             stdoutContextWriter.removeScriptContext(threading.currentThread())
 
             # Copy script locals back into script bindings/vars.
-            for key in script_locals.keys():
+            for key, value in script_locals.items():
                 try:
-                    arg.vars[key] = to_java(script_locals[key])
-                except Exception:
-                    arg.vars[key] = PythonObjectSupplier(script_locals[key])
+                    arg.vars[key] = to_java(value)
+                except Exception:  # noqa: BLE001
+                    arg.vars[key] = PythonObjectSupplier(value)
 
             return to_java(return_value)