param_grid.json

{
  "clf__n_estimators": [
    200,
    400
  ],
  "clf__max_depth": [
    null,
    5,
    10
  ],
  "clf__min_samples_split": [
    2,
    5
  ],
  "clf__min_samples_leaf": [
    1,
    2
  ],
  "clf__max_features": [
    "sqrt",
    "log2",
    0.5
  ]
}