feat!: replace mypy with ty (#321)

Author: lsorber

README.md

@@ -14,14 +14,14 @@ A modern [Copier template](https://github.com/copier-org/copier) for scaffolding
 - 📦 Packaging and dependency management with [uv](https://github.com/astral-sh/uv)
 - 🚚 Installing from and publishing to [PyPI](https://pypi.org/)
 - ⚡️ Task running with [Poe the Poet](https://github.com/nat-n/poethepoet)
-- 💅 Code formatting with [Ruff](https://github.com/charliermarsh/ruff)
-- ✅ Code linting with [Pre-commit](https://pre-commit.com/), [Mypy](https://github.com/python/mypy), and [Ruff](https://github.com/charliermarsh/ruff)
+- 💅 Code formatting with [ruff](https://github.com/astral-sh/ruff)
+- ✅ Code linting with [pre-commit](https://pre-commit.com/), [ruff](https://github.com/astral-sh/ruff), and [ty](https://github.com/astral-sh/ty)
 - 🏷 Optionally follow the [Conventional Commits](https://www.conventionalcommits.org/) standard
 - 🚦 Release new versions with [Semantic Versioning](https://semver.org/) and [Keep A Changelog](https://keepachangelog.com/) using [Commitizen](https://github.com/commitizen-tools)
 - 💌 Verified commits with [GPG](https://gnupg.org/)
 - ♻️ Continuous integration with [GitHub Actions](https://docs.github.com/en/actions) or [GitLab CI/CD](https://docs.gitlab.com/ee/ci/)
 - 🧪 Test coverage with [Coverage.py](https://github.com/nedbat/coveragepy)
-- 🧰 Dependency updates with [Dependabot](https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/about-dependabot-version-updates)
+- 🧰 Dependency updates with [Dependabot](https://docs.github.com/en/code-security/getting-started/dependabot-quickstart-guide)
 - 📚 Documentation with [MkDocs](https://github.com/mkdocs/mkdocs)
 
 ## ✨ Using

template/.devcontainer/devcontainer.json.jinja

@@ -25,6 +25,7 @@
         },
         "vscode": {
             "extensions": [
+                "astral-sh.ty",
                 "charliermarsh.ruff",
                 "GitHub.copilot",
                 "GitHub.copilot-chat",
@@ -35,7 +36,6 @@
                 "GitLab.gitlab-workflow",
                 {%- endif %}
                 "ms-azuretools.vscode-docker",
-                "ms-python.mypy-type-checker",
                 "ms-python.python",
                 "ms-toolsai.jupyter",
                 "ryanluker.vscode-coverage-gutters",
@@ -68,20 +68,16 @@
                 "jupyter.kernels.excludePythonEnvironments": [
                     "/usr/local/bin/python"
                 ],
-                "mypy-type-checker.importStrategy": "fromEnvironment",
-                "mypy-type-checker.preferDaemon": true,
                 "notebook.codeActionsOnSave": {
                     "notebook.source.fixAll": "explicit",
                     "notebook.source.organizeImports": "explicit"
                 },
                 "notebook.formatOnSave.enabled": true,
                 "python.defaultInterpreterPath": "/opt/venv/bin/python",
+                "python.languageServer": "None",
                 "python.terminal.activateEnvironment": false,
                 "python.testing.pytestEnabled": true,
                 "ruff.importStrategy": "fromEnvironment",
-                {%- if typing == 'strict' %}
-                "ruff.logLevel": "warning",
-                {%- endif %}
                 "terminal.integrated.env.linux": {
                     "GIT_EDITOR": "code --wait"
                 },

template/.pre-commit-config.yaml.jinja

@@ -77,8 +77,9 @@ repos:
         require_serial: true
         language: system
         types_or: [python, pyi]
-      - id: mypy
-        name: mypy
-        entry: mypy
+      - id: ty
+        name: ty
+        entry: ty check
+        require_serial: true
         language: system
-        types: [python]
+        types_or: [python, pyi]

template/pyproject.toml.jinja

@@ -48,7 +48,6 @@ dev = [
   "ipykernel (>=6.29.4)",
   "ipython (>=8.18.0)",
   "ipywidgets (>=8.1.2)",
-  "mypy (>=1.14.1)",
   "mkdocs-material (>=9.5.21)",
   {%- if project_type == 'package' %}
   "mkdocstrings[python] (>=0.26.2)",
@@ -59,6 +58,7 @@ dev = [
   "pytest-mock (>=3.14.0)",
   "pytest-xdist (>=3.6.1)",
   "ruff (>=0.9.2)",
+  "ty (>=0.0.5)",
   {%- if typing == 'strict' %}
   "typeguard (>=4.4.1)",
   {%- endif %}
@@ -89,31 +89,6 @@ source = ["src"]
 [tool.coverage.xml]  # https://coverage.readthedocs.io/en/latest/config.html#xml
 output = "reports/coverage.xml"
 
-[tool.mypy]  # https://mypy.readthedocs.io/en/latest/config_file.html
-junit_xml = "reports/mypy.xml"
-{%- if with_fastapi_api %}
-plugins = "pydantic.mypy"
-{%- endif %}
-{%- if typing == 'strict' %}
-strict = true
-disallow_subclassing_any = false
-disallow_untyped_decorators = false
-{%- endif %}
-ignore_missing_imports = true
-pretty = true
-show_column_numbers = true
-show_error_codes = true
-show_error_context = true
-warn_unreachable = true
-{%- if typing == 'strict' and with_fastapi_api %}
-
-[tool.pydantic-mypy]  # https://docs.pydantic.dev/latest/integrations/mypy/#configuring-the-plugin
-init_forbid_extra = true
-init_typed = true
-warn_required_dynamic_aliases = true
-warn_untyped_fields = true
-{%- endif %}
-
 [tool.pytest.ini_options]  # https://docs.pytest.org/en/latest/reference/reference.html#ini-options-ref
 addopts = "--color=yes --doctest-modules --exitfirst --failed-first{% if typing == 'strict' %} --strict-config --strict-markers{% endif %} --verbosity=2 --junitxml=reports/pytest.xml"
 {%- if typing == 'strict' %}
@@ -158,6 +133,19 @@ max-doc-length = 100
 
 [tool.ruff.lint.pydocstyle]
 convention = "numpy"
+{%- if project_type == 'package' %}
+
+[tool.ty.environment]
+python-platform = "all"
+{%- endif %}
+
+[tool.ty.rules]
+unused-ignore-comment = "warn"
+{%- if typing == 'strict' %}
+
+[tool.ty.terminal]
+error-on-warning = true
+{%- endif %}
 
 [tool.poe.executor]  # https://github.com/nat-n/poethepoet
 type = "simple"