I use this to generate some scales, arpeggios, triads, chords to practice.

piano_technique_generator.py

#!/usr/bin/env python3
"""Generate technique practice schedule"""
import argparse
import datetime
import random

ALL_TYPES = \
{'Major Scales': ["G","D","B","Bb","Eb"],
 'Harmonic Minor Scales': ["E","B","G#","G","C"],
 'Melodic Minor Scales': ["E","B","G#","G","C"],
 'Formula Pattern': ["C","Eb","E minor"],
 'Chromatic Scales': ["C","D","E","F","G","A","B"],
 '4-note Broken Major Chords': ["G","D","B","Bb","Eb"],
 '4-note Broken Minor Chords': ["E","B","G#","G","C"],
 'Dominant 7th Solid Chords': ["G","D","B","Bb","Eb"],
 'Dominant 7th Broken Chords': ["G","D","B","Bb","Eb"],
 'Diminished 7th Solid Chords': ["E","B","G#","G","C"],
 'Diminished 7th Broken Chords': ["E","B","G#","G","C"],
 'Arpeggios major/minor': ["G","D","B","Em","Bm"],
 'Arpeggios 7th': ["Gdom7","Ddom7","Bb dom7","Edim","Bdim","Cdim"]}

def print_plan(how_many=1, print_dates=False):
    """ Print random music technique """
    today = datetime.datetime.today()
    for delta in range(how_many):
        print("----------------------------------------")
        if print_dates is True:
            print("Date:", (today + datetime.timedelta(delta)).date())
        for key, values in list(ALL_TYPES.items()):
            print(key + ",", end=' ')
            print(random.choice(values))
        print()

def parse_command_line():
    """ parse command line arguments """
    parser = argparse.ArgumentParser()
    parser.add_argument('--dates', '-d', action='store_true',
                        default=False,
                        help='Print each random set with a date on it')
    parser.add_argument('--num', '-n', default=1, type=int,
                        help='How many to generate')
    return parser.parse_args()

def main():
    """ main script """
    args = parse_command_line()
    print_plan(args.num, args.dates)

if __name__ == "__main__":
    main()