Drop support for Python 3.6, 3.7, 3.8, 3.9

mph/client.py

@@ -7,14 +7,15 @@
 from .config import option
 
 import jpype
-import jpype.imports
+import jpype.imports                      # noqa: F401 (imported, but not used)
 import os
 import faulthandler
 from pathlib import Path
 from logging import getLogger
 
-from typing import overload, Iterator
-from jpype  import JClass
+from typing          import overload
+from collections.abc import Iterator
+from jpype           import JClass
 
 
 # The following look-up table is used by the `modules()` method. It is

mph/discovery.py

@@ -245,9 +245,8 @@ def search_path() -> Path | None:
         process = subprocess.run(
             command, shell=True, check=True, timeout=3,
             stdout=subprocess.PIPE, stderr=subprocess.DEVNULL,
-            universal_newlines=True, encoding='UTF-8',
+            text=True, encoding='UTF-8',
         )
-        # `universal_newlines` instead of `text` to support Python 3.6.
     except subprocess.CalledProcessError:
         log.debug('Command exited with an error.')
         return
@@ -376,14 +375,12 @@ def find_backends() -> list[Backend]:
         # Get version information from Comsol server.
         command: list[Path | str]
         command = server + ['--version']
-        command[0] = str(command[0])   # Needed to support Python 3.6 and 3.7.
         try:
-            arguments = dict(  # noqa: C408 (unnecessary dict() call)
+            arguments = dict(          # noqa: C408 (unnecessary `dict()` call)
                 check=True, timeout=15,
                 stdout=subprocess.PIPE, stderr=subprocess.DEVNULL,
-                universal_newlines=True, encoding='ascii', errors='ignore',
+                text=True, encoding='ascii', errors='ignore',
             )
-            # `universal_newlines` instead of `text` to support Python 3.6.
             if system == 'Windows':
                 arguments['creationflags'] = 0x08000000
             process = subprocess.run(

mph/model.py

@@ -10,10 +10,11 @@
 from re       import match
 from logging  import getLogger
 
-from jpype        import JClass
-from typing       import overload, Literal, Iterator
-from numpy.typing import ArrayLike, NDArray
-from numpy        import int32, float64
+from jpype           import JClass
+from typing          import overload, Literal
+from collections.abc import Iterator
+from numpy.typing    import ArrayLike, NDArray
+from numpy           import int32, float64
 
 
 # The following look-up table is used by the `modules()` method. It maps

mph/node.py

@@ -11,11 +11,12 @@
 from functools import lru_cache
 from logging   import getLogger
 
-from typing       import TYPE_CHECKING, overload, Iterator, Sequence, Literal
-from numpy.typing import ArrayLike, NDArray
-from numpy        import int32
+from typing          import TYPE_CHECKING, overload, Literal
+from collections.abc import Iterator, Sequence
+from numpy.typing    import ArrayLike, NDArray
+from numpy           import int32
 if TYPE_CHECKING:
-    from .model   import Model
+    from .model      import Model
 
 
 log = getLogger(__package__)

mph/server.py

@@ -106,7 +106,6 @@ def __init__(self,
                 log.error(error)
                 raise ValueError(error)
         command = server + arguments + extra_arguments
-        command[0] = str(command[0])   # Required for Python 3.6 and 3.7.
         process = start(command, stdin=PIPE, stdout=PIPE, errors='ignore')
 
         # Remember the requested port (if any).

pyproject.toml

@@ -21,7 +21,7 @@ license = 'MIT'
 license-files = ['license.txt']
 readme = 'PyPI.md'
 
-requires-python = '>= 3.6'
+requires-python = '>= 3.10'
 dependencies = [
     'JPype1',
     'NumPy',
@@ -64,7 +64,7 @@ name = 'mph'
 [tool.ruff]
 line-length    = 79
 indent-width   = 4
-target-version = 'py37'
+target-version = 'py310'
 include = [
     'mph/*.py',
     'tests/*.py',
@@ -119,8 +119,6 @@ include = [
         'PT012',              # `pytest.raises()` with multiple statements
         'PT013',              # incorrect pytest import
         'PTH201',             # Never use `Path('.')`.
-        'UP021',              # `universal_newlines` instead of `text`
-        'UP022',              # `PIPE` instead of `capture_output`
         'UP024',              # Replace `IOError` with `OSError`.
     ]
 

tests/exit_nojvm_exc.py

@@ -1,6 +1,6 @@
 """Process exiting with exception when no Java VM is running."""
 
-import mph # noqa F401
+import mph                                 # noqa: F401 (imported but not used)
 
 
 raise RuntimeError

tests/exit_nojvm_sys.py

@@ -1,6 +1,6 @@
 """Process exiting via `sys.exit()` with no Java VM running."""
 
-import mph # noqa F401
+import mph                                 # noqa: F401 (imported but not used)
 
 import sys
 

tests/test_exit.py

@@ -2,21 +2,20 @@
 
 from fixtures   import setup_logging
 
-from subprocess import run, PIPE
+from subprocess import run
 from pathlib    import Path
 from sys        import executable as python
 
 
-def run_script(name):
+def run_script(name: str):
     # Runs the named script from the project's root folder so that coverage
     # reporting doesn't get confused about source file locations.
     here = Path(__file__).resolve().parent
     file = here/name
     assert file.is_file()
     assert file.suffix == '.py'
     root = here.parent
-    process = run([python, str(file)], cwd=root,
-                  stdout=PIPE, stderr=PIPE, universal_newlines=True)
+    process = run([python, file], cwd=root, capture_output=True, text=True)
     return process