Here’s my Python code to make the prediction. The training data and the testing data are massaged so that String values have been converted to integer. And the output is a single list of survived value (I removed the passenger id from all the files because it will not be used in the analyzing, so remember to add the passenger id back when doing a submission.) There are some discrete features in the data, e.g. sex, pclass, sibling, parch, etc, and some non-discrete features, e.g. age, fare. I think it will be a key to improve to fine tune boundaries of the non-discrete features. Anyway, it is a beginning, I need have more insight in the data set to get a higher score. Finally, note that the submission validation has changed lately too.
from sklearn.ensemble import RandomForestClassifier import csv as csv, numpy as np csv_file_object = csv.reader(open('./train_sk.csv', 'rb')) train_header = csv_file_object.next() # skip the header train_data =  for row in csv_file_object: train_data.append(row) train_data = np.array(train_data) Forest = RandomForestClassifier(n_estimators = 100) Forest = Forest.fit(train_data[0::, 1::], train_data[0::, 0]) test_file_object = csv.reader(open('./test_sk.csv', 'rb')) test_header = test_file_object.next() # skip header row test_data =  for row in test_file_object: test_data.append(row) test_data = np.array(test_data) output = Forest.predict(test_data) output = output.astype(int) np.savetxt('./output.csv', output, delimiter=',')