py-econometrics · juanitorduz · Dec 21, 2025 · Dec 21, 2025
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -22,7 +22,7 @@ repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.14.9
     hooks:
-      - id: ruff
+      - id: ruff-check
         args: ["--fix", "--output-format=full"]
       - id: ruff-format
 
@@ -33,10 +33,11 @@ repos:
         args: ["--fix", "--output-format=full", "--ignore=B018", "--ignore=E402"]
         files: ^docs/.*\.ipynb$
 
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.19.1
+  - repo: local
     hooks:
-      - id: mypy
-        args: [--ignore-missing-imports, --config-file=pixi.toml]
-        files: ^pyfixest/
-        additional_dependencies: [numpy>=1.20, pandas-stubs]
+      - id: ty
+        name: ty
+        entry: pixi run -e lint ty check pyfixest
+        language: system
+        types: [python]
+        pass_filenames: false
diff --git a/docs/_freeze/changelog/execute-results/html.json b/docs/_freeze/changelog/execute-results/html.json
@@ -13,4 +13,4 @@
       ]
     }
   }
-}
+}
diff --git a/docs/quickstart.ipynb b/docs/quickstart.ipynb
@@ -3662,4 +3662,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}
diff --git a/pixi.lock b/pixi.lock
diff --git a/pixi.toml b/pixi.toml
@@ -109,6 +109,9 @@ lets-plot = ">=4.0.0"
 [feature.lint.dependencies]
 pre-commit = "==3.6.0"
 
+[feature.lint.pypi-dependencies]
+ty = "*"
+
 [feature.build.dependencies]
 pip = "*"
 maturin = ">=1.8.0"

diff --git a/pyproject.toml b/pyproject.toml
@@ -125,20 +125,22 @@ convention = "numpy"
 docstring-code-format = true
 docstring-code-line-length = 88
 
-[tool.mypy]
-
-[[tool.mypy.overrides]]
-module = [
-  "pandas.*",
-  "numpy.*",
-  "scipy.*",
-  "numba.*",
-  "lets_plot.*",
-  "formulaic.*",
-  "wildboottest.*",
-  "tabulate.*",
-  "joblib.*",
-  "narwhals.*",
-  "tqdm.*",
-]
-ignore_missing_imports = true
+[tool.ty.environment]
+python-version = "3.9"
+
+[tool.ty.rules]
+# Ignore errors from untyped dependencies and gradual typing
+# These can be enabled one-by-one as type annotations are improved
+unresolved-import = "ignore"
+invalid-argument-type = "ignore"
+unknown-argument = "ignore"
+unresolved-attribute = "ignore"
+non-subscriptable = "ignore"
+unsupported-operator = "ignore"
+invalid-return-type = "ignore"
+missing-argument = "ignore"
+no-matching-overload = "ignore"
+not-iterable = "ignore"
+invalid-assignment = "ignore"
+unresolved-reference = "ignore"
+call-non-callable = "ignore"
diff --git a/tests/test_wls_types.py b/tests/test_wls_types.py
@@ -6,7 +6,6 @@
 
 def _assert_fit_equal(fit1, fit2, vcov_types, rtol=1e-5):
     "Assert that two regression fits have identical coefficients, vcov, and SEs."
-
     assert fit1._N == fit2._N, "Number of observations is not the same."
 
     np.testing.assert_allclose(
-Original file line number
+Diff line change
@@ Expand Up / @@ -13,4 +13,4 @@ @@
           ]
         }
       }
-    }
+    }