$ mypy optuna_integration/_lightgbm_tuner/
Success: no issues found in 5 source files
$ pip install -U numpy
Requirement already satisfied: numpy in ./venv/lib/python3.11/site-packages (2.1.3)
Collecting numpy
  Downloading numpy-2.2.4-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (62 kB)
Downloading numpy-2.2.4-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (16.4 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 16.4/16.4 MB 84.9 MB/s eta 0:00:00
Installing collected packages: numpy
  Attempting uninstall: numpy
    Found existing installation: numpy 2.1.3
    Uninstalling numpy-2.1.3:
      Successfully uninstalled numpy-2.1.3
Successfully installed numpy-2.2.4

[notice] A new release of pip is available: 24.3.1 -> 25.0.1
[notice] To update, run: pip install --upgrade pip
$ mypy optuna_integration/_lightgbm_tuner/
optuna_integration/_lightgbm_tuner/optimize.py:561: error: Incompatible types in assignment (expression has type "list[str]", variable has type "str")  [assignment]
optuna_integration/_lightgbm_tuner/optimize.py:561: error: Unsupported operand types for >= ("str" and "float")  [operator]
optuna_integration/_lightgbm_tuner/optimize.py:561: error: Unsupported operand types for <= ("str" and "float")  [operator]
Found 3 errors in 1 file (checked 5 source files)