Pylint plugin for linting data science and machine learning code, focussed on the libraries pandas and scikit-learn.

Implemented checkers:

• Unassigned DataFrame Checker: Operations on DataFrames return new DataFrames. These DataFrames should be assigned to a variable.
• DataFrame Iteration Checker: Vectorized solutions are preferred over iterators for DataFrames.
• Nan Equality Checker: Values cannot be compared with np.nan, as np.nan != np.nan.
• Hyperparameter Checker: For (scikit-learn) learning algorithms, all hyperparameters should be set.
• Import Checker: Check whether data science modules are imported using the correct naming conventions.
• Data Leakage Checker: All scikit-learn estimators should be used inside Pipelines, to prevent data leakage between training and test data.

To install from source for development purposes: clone this repo and install the plugin with:

pip install -e .

To install from the Python Package Index:

pip install dslinter

To only use the checkers implemented in this plugin, run:

pylint --load-plugins=dslinter --disable=all --enable=dataframe,nan,hyperparameters,import,data-leakage <other_options> <path_to_sources>

To expand a current pylint configuration with the checkers from this plugin, run:

pylint --load-plugins=dslinter <other_options> <path_to_sources>

Tests can be run by using the pytest package:

pytest .