preprocess is the subcommand of microLearner. MinMaxScaler is the argument
to the subcommand. --range, -o and -i are the options. The options for the command is insensitive to the letter cases.
microLearner preprocess MinMaxScaler --range 0 1 -i microLearner/data/otus.txt -o /tmp/foo.txt
microLearner preprocess MinMaxScaler --Range 0 1 -i microLearner/data/otus.txt -o /tmp/foo.txt