piano.py

'''
PyPiano Version 1.0 (C) 2018 apple502j

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
'''
from platform import system as _system
from sys import exit as _exit
if _system() != "Windows":
    print("Sorry, This program doesn't work in your OS. Please use Windows!")
    _exit()

import winsound
from gpltext import GPL_license
from linereadw import linereadw
from msvcrt import getch
from math import log10

def freq(note):
    return 440*(10**(((note-69)/12)*log10(2)))
def yesno(s):
    if s.lower()=="yes" or s.lower()=="y" or s=="1" or s.lower()=="true":
        return True
    else:
        return False

keyNote={b"a":59,b"s":60,b"e":61,b"d":62,b"r":63,b"f":64,b"g":65,b"y":66,b"h":67,b"u":68,b"j":69,b"i":70,b"k":71,b"l":72}

def play(k):
    if k in keyNote:
        winsound.Beep(int(freq(keyNote[k])),500)
    

print("""
PyPiano Version 1.0 (C) 2018 apple502j
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'o' for details.
Use your keyboard to play. Quit? Push 'p'.

Anyway, play with it! Have fun!
""")
while True:
    key=getch()
    if key == b'o':
        linereadw(GPL_license,20)
    if key == b'p':
        if yesno(input("Do you really want to quit? (Yes/No)>")):
            _exit()
    play(key)