How to tune Hyper parameters using Grid Search in Python?
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How to tune Hyper parameters using Grid Search in Python?

How to tune Hyper parameters using Grid Search in Python?

This recipe helps you tune Hyper parameters using Grid Search in Python

0
This data science python source code does the following: 1. Different methods for Hyperparameter tuning a model. 2. Implements GridSearhCV using Cross Validation method. 3. Setting up parameters for GridSearchCV. 4. Obtains the best parameters and best result.
In [1]:
## How to tune Hyper-parameters using Grid Search in Python
def Snippet_142():
    print()
    print(format('How to tune Hyper-parameters using Grid Search in Python','*^82'))

    import warnings
    warnings.filterwarnings("ignore")

    # load libraries
    import numpy as np
    from sklearn import linear_model, datasets
    from sklearn.model_selection import GridSearchCV

    # Load data
    iris = datasets.load_iris()
    X = iris.data
    y = iris.target

    # Create logistic regression
    logistic = linear_model.LogisticRegression()

    # Create Hyperparameter Search Space
    # Create regularization penalty space
    penalty = ['l1', 'l2']

    # Create regularization hyperparameter space
    C = np.logspace(0, 4, 10)

    # Create hyperparameter options
    hyperparameters = dict(C=C, penalty=penalty)

    # Create grid search using 5-fold cross validation
    clf = GridSearchCV(logistic, hyperparameters, cv=5, verbose=0)

    # Fit grid search
    best_model = clf.fit(X, y)

    # View best hyperparameters
    print('Best Penalty:', best_model.best_estimator_.get_params()['penalty'])
    print('Best C:', best_model.best_estimator_.get_params()['C'])

Snippet_142()
*************How to tune Hyper-parameters using Grid Search in Python*************
Best Penalty: l1
Best C: 7.742636826811269

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