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+# main imports
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+import numpy as np
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+import pandas as pd
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+import sys, os, argparse
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+
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+# models imports
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+from sklearn.model_selection import train_test_split
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+from sklearn.model_selection import GridSearchCV
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+from sklearn.linear_model import LogisticRegression
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+from sklearn.ensemble import RandomForestClassifier, VotingClassifier
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+
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+import sklearn.svm as svm
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+from sklearn.utils import shuffle
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+from sklearn.externals import joblib
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+from sklearn.metrics import accuracy_score, f1_score
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+from sklearn.model_selection import cross_val_score
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+
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+# modules and config imports
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+sys.path.insert(0, '') # trick to enable import of main folder module
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+
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+import custom_config as cfg
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+import models as mdl
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+
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+# variables and parameters
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+saved_models_folder = cfg.saved_models_folder
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+models_list = cfg.models_names_list
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+
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+current_dirpath = os.getcwd()
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+output_model_folder = os.path.join(current_dirpath, saved_models_folder)
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+
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+
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+def main():
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+
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+ parser = argparse.ArgumentParser(description="Train SKLearn model and save it into .joblib file")
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+
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+ parser.add_argument('--data', type=str, help='dataset filename prefix (without .train and .test)')
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+ parser.add_argument('--output', type=str, help='output file name desired for model (without .joblib extension)')
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+ parser.add_argument('--choice', type=str, help='model choice from list of choices', choices=models_list)
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+ parser.add_argument('--solution', type=str, help='Data of solution to specify filters to use')
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+
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+ args = parser.parse_args()
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+
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+ p_data_file = args.data
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+ p_output = args.output
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+ p_choice = args.choice
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+ p_solution = list(map(int, args.solution.split(' ')))
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+
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+ if not os.path.exists(output_model_folder):
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+ os.makedirs(output_model_folder)
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+
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+ ########################
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+ # 1. Get and prepare data
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+ ########################
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+ dataset_train = pd.read_csv(p_data_file + '.train', header=None, sep=";")
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+ dataset_test = pd.read_csv(p_data_file + '.test', header=None, sep=";")
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+
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+ # default first shuffle of data
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+ dataset_train = shuffle(dataset_train)
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+ dataset_test = shuffle(dataset_test)
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+
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+ # get dataset with equal number of classes occurences
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+ noisy_df_train = dataset_train[dataset_train.ix[:, 0] == 1]
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+ not_noisy_df_train = dataset_train[dataset_train.ix[:, 0] == 0]
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+ nb_noisy_train = len(noisy_df_train.index)
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+
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+ noisy_df_test = dataset_test[dataset_test.ix[:, 0] == 1]
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+ not_noisy_df_test = dataset_test[dataset_test.ix[:, 0] == 0]
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+ nb_noisy_test = len(noisy_df_test.index)
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+
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+ final_df_train = pd.concat([not_noisy_df_train[0:nb_noisy_train], noisy_df_train])
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+ final_df_test = pd.concat([not_noisy_df_test[0:nb_noisy_test], noisy_df_test])
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+
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+ # shuffle data another time
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+ final_df_train = shuffle(final_df_train)
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+ final_df_test = shuffle(final_df_test)
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+
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+ final_df_train_size = len(final_df_train.index)
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+ final_df_test_size = len(final_df_test.index)
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+
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+ # use of the whole data set for training
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+ x_dataset_train = final_df_train.ix[:,1:]
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+ x_dataset_test = final_df_test.ix[:,1:]
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+
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+ y_dataset_train = final_df_train.ix[:,0]
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+ y_dataset_test = final_df_test.ix[:,0]
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+
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+ # get indices of filters data to use (filters selection from solution)
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+ indices = []
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+
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+ print(p_solution)
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+ for index, value in enumerate(p_solution):
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+ if value == 1:
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+ indices.append(index*2)
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+ indices.append(index*2+1)
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+
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+ print(indices)
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+
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+ x_dataset_train = x_dataset_train.iloc[:, indices]
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+ x_dataset_test = x_dataset_test.iloc[:, indices]
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+
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+ #######################
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+ # 2. Construction of the model : Ensemble model structure
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+ #######################
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+
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+ print("-------------------------------------------")
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+ print("Train dataset size: ", final_df_train_size)
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+ model = mdl.get_trained_model(p_choice, x_dataset_train, y_dataset_train)
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+
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+ #######################
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+ # 3. Fit model : use of cross validation to fit model
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+ #######################
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+ val_scores = cross_val_score(model, x_dataset_train, y_dataset_train, cv=5)
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+ print("Accuracy: %0.2f (+/- %0.2f)" % (val_scores.mean(), val_scores.std() * 2))
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+
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+ ######################
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+ # 4. Test : Validation and test dataset from .test dataset
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+ ######################
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+
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+ # we need to specify validation size to 20% of whole dataset
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+ val_set_size = int(final_df_train_size/3)
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+ test_set_size = val_set_size
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+
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+ total_validation_size = val_set_size + test_set_size
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+
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+ if final_df_test_size > total_validation_size:
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+ x_dataset_test = x_dataset_test[0:total_validation_size]
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+ y_dataset_test = y_dataset_test[0:total_validation_size]
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+
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+ X_test, X_val, y_test, y_val = train_test_split(x_dataset_test, y_dataset_test, test_size=0.5, random_state=1)
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+
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+ y_test_model = model.predict(X_test)
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+ y_val_model = model.predict(X_val)
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+
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+ val_accuracy = accuracy_score(y_val, y_val_model)
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+ test_accuracy = accuracy_score(y_test, y_test_model)
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+
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+ val_f1 = f1_score(y_val, y_val_model)
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+ test_f1 = f1_score(y_test, y_test_model)
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+
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+ ###################
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+ # 5. Output : Print and write all information in csv
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+ ###################
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+
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+ print("Validation dataset size ", val_set_size)
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+ print("Validation: ", val_accuracy)
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+ print("Validation F1: ", val_f1)
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+ print("Test dataset size ", test_set_size)
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+ print("Test: ", val_accuracy)
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+ print("Test F1: ", test_f1)
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+
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+ ##################
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+ # 6. Save model : create path if not exists
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+ ##################
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+
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+ if not os.path.exists(saved_models_folder):
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+ os.makedirs(saved_models_folder)
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+
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+ joblib.dump(model, output_model_folder + '/' + p_output + '.joblib')
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+
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+if __name__== "__main__":
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+ main()
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