feat: support Python 3.7+

Fix #292

.tool-versions

@@ -1,2 +1,2 @@
 nodejs 18.14.2
-python 3.10.9
+python 3.7.16

python/.pylintrc

@@ -82,7 +82,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.10
+py-version=3.7
 
 # Discover python modules and packages in the file system subtree.
 recursive=no

python/.tool-versions

@@ -1 +1 @@
-python 3.10.9
+python 3.7.16

python/pyproject.toml

@@ -5,11 +5,12 @@ description = "Scripts to communicate between the extension and Qt for Python li
 authors = ["Shuang Wu <seanwu1105@gmail.com>"]
 
 [tool.poetry.dependencies]
-python = "~3.10"
+python = "~3.7.2"
 pyside6 = "^6.4.2"
 pyqt6 = "^6.4.0"
 pyside2 = { version = "^5.15.2.1", markers = "sys_platform != 'darwin' or platform_machine != 'arm64'" }
 pyqt5 = { version = "^5.15.7", markers = "sys_platform != 'darwin' or platform_machine != 'arm64'" }
+typing-extensions = "^4.5.0"
 
 [tool.poetry.group.dev.dependencies]
 pylint = "^2.14.5"

python/scripts/utils/__init__.py

@@ -3,10 +3,12 @@
 import sys
 import typing
 
+import typing_extensions  # Remove after dropping Python 3.7
+
 QT_DEPENDENCY_ARG = "vscode_extension_qt_dependency"
 
 SupportedQtDependencies = typing.Optional[
-    typing.Literal["PySide6", "PySide2", "PyQt6", "PyQt5"]
+    typing_extensions.Literal["PySide6", "PySide2", "PyQt6", "PyQt5"]
 ]
 
 
@@ -21,7 +23,8 @@ def parse_qt_dependency() -> SupportedQtDependencies:
         required=False,
     )
 
-    if dep := vars(parser.parse_known_args()[0])[QT_DEPENDENCY_ARG]:
+    dep = vars(parser.parse_known_args()[0])[QT_DEPENDENCY_ARG]
+    if dep is not None:
         sys.argv.remove(f"--{QT_DEPENDENCY_ARG}")
         sys.argv.remove(dep)
 

python/tests/__init__.py

@@ -3,6 +3,8 @@
 import subprocess
 import typing
 
+import typing_extensions
+
 from scripts.utils import QT_DEPENDENCY_ARG, SupportedQtDependencies
 
 TESTS_DIR = os.path.dirname(os.path.realpath(__file__))
@@ -11,22 +13,22 @@
 
 ASSETS_DIR = os.path.join(TESTS_DIR, "assets")
 
-SupportedScripts = typing.Literal[
+SupportedScripts = typing_extensions.Literal[
     "designer", "qml", "qmlls", "rcc", "uic", "lupdate", "linguist", "lrelease"
 ]
 
 
 def filter_available_qt_dependencies(
-    deps: list[SupportedQtDependencies],
-) -> list[SupportedQtDependencies]:
+    deps: typing.List[SupportedQtDependencies],
+) -> typing.List[SupportedQtDependencies]:
     if platform.system() == "Darwin" and platform.machine() == "arm64":
         return [None] + list(filter(lambda d: d not in ("PySide2", "PyQt5"), deps))
     return [None] + deps
 
 
 def invoke_script(
     name: SupportedScripts,
-    args: list[str],
+    args: typing.List[str],
     qt_dependency: SupportedQtDependencies,
 ):
     if qt_dependency is not None: