Random Password Program For RBPM

# Script for use in RBPM @ https://pastebin.com/C5Ye98S9

from random import randrange

alpha = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsRrTtUuVvWwXxYyZz123456789"
passw = ""

ncharacters = int(input("How many characters do you want in the password: "))
addSymbol = input("Do you want to add a symbol: ").lower()[0]

for i in range(1, ncharacters):
        ch = alpha[randrange(0, len(alpha))]
        passw += ch

if addSymbol == 'y':
        symbols = "@%+\\/'!#$^?:.(){}[]~_."
        sy = symbols[randrange(0, len(symbols))]
        passw += sy

print(passw)