In Google Colab's Python write code that uses a ndarray called y_pred with shape (1000,) to write a new csv file with the names 0000.csv - 0999.csv as column number 1 and column 2 is the respective values from y_pred. y_pred is already in order. Title the columns as 'filename' and 'prediction'. So the output should be a csv file that looks like:

filename, prediction

0000.csv, 1

0001.csv, 0

....