dependencies: sever the dependency on packaging.version

Make qtpy more self-contained by implementing our own simple version parse()
function instead of relying on packaging.version.

qtpy/QtCore.py

@@ -10,9 +10,7 @@
 import contextlib
 from typing import TYPE_CHECKING
 
-from packaging.version import parse
-
-from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6
+from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6, parse
 from . import QT_VERSION as _qt_version
 from ._utils import possibly_static_exec, possibly_static_exec_
 

qtpy/QtGui.py

@@ -10,9 +10,7 @@
 
 from functools import partialmethod
 
-from packaging.version import parse
-
-from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6
+from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6, parse
 from . import QT_VERSION as _qt_version
 from ._utils import (
     getattr_missing_optional_dep,

qtpy/QtWidgets.py

@@ -9,9 +9,7 @@
 """Provides widget classes and functions."""
 from functools import partialmethod
 
-from packaging.version import parse
-
-from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6
+from . import PYQT5, PYQT6, PYSIDE2, PYSIDE6, parse
 from . import QT_VERSION as _qt_version
 from ._utils import (
     add_action,

qtpy/__init__.py

@@ -60,8 +60,6 @@
 import sys
 import warnings
 
-from packaging.version import parse
-
 # Version of QtPy
 __version__ = "2.5.0.dev0"
 
@@ -185,6 +183,20 @@ def __init__(self, *, missing_package=None, **superclass_kwargs):
 PYSIDE_VERSION = None
 QT_VERSION = None
 
+
+def _parse_int(value):
+    """Convert a value into an integer"""
+    try:
+        return int(value)
+    except ValueError:
+        return 0
+
+
+def parse(version):
+    """Parse a version string into a tuple of ints"""
+    return tuple(_parse_int(x) for x in version.split("."))
+
+
 # Unless `FORCE_QT_API` is set, use previously imported Qt Python bindings
 if not os.environ.get("FORCE_QT_API"):
     if "PyQt5" in sys.modules:

qtpy/tests/test_qtconcurrent.py

@@ -1,7 +1,6 @@
 import pytest
-from packaging.version import parse
 
-from qtpy import PYSIDE2, PYSIDE_VERSION
+from qtpy import PYSIDE2, PYSIDE_VERSION, parse
 from qtpy.tests.utils import pytest_importorskip
 
 

qtpy/tests/test_qtcore.py

@@ -5,7 +5,6 @@
 from datetime import date, datetime, time
 
 import pytest
-from packaging.version import parse
 
 from qtpy import (
     PYQT5,
@@ -14,6 +13,7 @@
     PYSIDE2,
     PYSIDE_VERSION,
     QtCore,
+    parse,
 )
 
 _now = datetime.now()

qtpy/tests/test_qtgui.py

@@ -3,7 +3,6 @@
 import sys
 
 import pytest
-from packaging.version import parse
 
 from qtpy import (
     PYQT5,
@@ -14,6 +13,7 @@
     QtCore,
     QtGui,
     QtWidgets,
+    parse,
 )
 from qtpy.tests.utils import not_using_conda
 

qtpy/tests/test_qttest.py

@@ -1,7 +1,6 @@
 import pytest
-from packaging import version
 
-from qtpy import PYQT5, PYQT6, PYQT_VERSION, PYSIDE6, QtTest
+from qtpy import PYQT5, PYQT6, PYQT_VERSION, PYSIDE6, QtTest, parse
 
 
 def test_qttest():
@@ -12,7 +11,7 @@ def test_qttest():
         assert QtTest.QSignalSpy is not None
 
         if (
-            (PYQT5 and version.parse(PYQT_VERSION) >= version.parse("5.11"))
+            (PYQT5 and parse(PYQT_VERSION) >= parse("5.11"))
             or PYQT6
             or PYSIDE6
         ):

qtpy/tests/test_qttexttospeech.py

@@ -1,14 +1,10 @@
 import pytest
-from packaging import version
 
-from qtpy import PYQT5, PYQT_VERSION, PYSIDE2
+from qtpy import PYQT5, PYQT_VERSION, PYSIDE2, parse
 
 
 @pytest.mark.skipif(
-    not (
-        (PYQT5 and version.parse(PYQT_VERSION) >= version.parse("5.15.1"))
-        or PYSIDE2
-    ),
+    not ((PYQT5 and parse(PYQT_VERSION) >= parse("5.15.1")) or PYSIDE2),
     reason="Only available in Qt5 bindings (PyQt5 >= 5.15.1 or PySide2)",
 )
 def test_qttexttospeech():

qtpy/tests/test_qtwebenginewidgets.py

@@ -1,14 +1,21 @@
 import pytest
-from packaging import version
 
-from qtpy import PYQT5, PYQT6, PYQT_VERSION, PYSIDE2, PYSIDE6, PYSIDE_VERSION
+from qtpy import (
+    PYQT5,
+    PYQT6,
+    PYQT_VERSION,
+    PYSIDE2,
+    PYSIDE6,
+    PYSIDE_VERSION,
+    parse,
+)
 from qtpy.tests.utils import pytest_importorskip
 
 
 @pytest.mark.skipif(
     not (
-        (PYQT6 and version.parse(PYQT_VERSION) >= version.parse("6.2"))
-        or (PYSIDE6 and version.parse(PYSIDE_VERSION) >= version.parse("6.2"))
+        (PYQT6 and parse(PYQT_VERSION) >= parse("6.2"))
+        or (PYSIDE6 and parse(PYSIDE_VERSION) >= parse("6.2"))
         or PYQT5
         or PYSIDE2
     ),

qtpy/tests/test_uic.py

@@ -4,9 +4,8 @@
 import warnings
 
 import pytest
-from packaging.version import parse
 
-from qtpy import PYSIDE2, PYSIDE6, PYSIDE_VERSION, QtWidgets
+from qtpy import PYSIDE2, PYSIDE6, PYSIDE_VERSION, QtWidgets, parse
 from qtpy.QtWidgets import QComboBox
 from qtpy.tests.utils import pytest_importorskip, using_conda
 

qtpy/tests/utils.py

@@ -3,7 +3,8 @@
 import os
 
 import pytest
-from packaging.version import parse
+
+from qtpy import parse
 
 
 def using_conda():