问我想在Python V 3.4.3中为我的游戏创建一个库存系统

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import sys     #Imports the system commands which makes it possible to terminate the program
import time    #Imports the time module to allow delays in script
import os      #Imports os to make it possible to play music/sound
import random

print('Welcome to the Text Adventure login screen') #Login screen welcome message

username1 = input ('Please set a username: ') #Setting the username
password1 = input ('Please set a password: ') #Setting the password


username2 = input ('Please enter your username: ') #Entering the saved username
if username2 == username1 :
    print('Please enter password to prove it\'s ' + username1) #Prints confirmation messages

if username2 != username1:          #Checks if password's incorrect if so, Terminates the program
    print ('Username Incorrect!!!')
    sys.exit()


password2 = input ('Please enter your password: ') #Entering the saved password
if password2 == password1 :
    print ('Password Correct!')
if password2 != password1 :                    #Checks if password is incorrect, if so terminates the program
    print ('Password incorrect you hacker!!!')
    sys.exit


print ('WELCOME ' + username1 + ' TO TEXT ADVENTURE V 1.0')  #Prints welcome message to text adventure
os.system("start F:\Python\Adventure.mp3")

    #http://codereview.stackexchange.com/questions/57438/game-inventory-system   Website
class Item(object):
    def __init__(self, name, value, quantity = 1):
        self.name = name
        self.value = value
        self.quantity = quantity
def itemadd(self):
    inventory.append(Item)

class Weapon(Item):
    def __init__(self, name, value, damage, quantity = 1):
        Item.__init__(name, value, quantity)

        self.damage = damage

def weaponadd(self):
    weapons.append(Weapon)

def Wooden_Sword(Weapon):
    name = "Wooden Sword"
    value = 10
    damage = 25
def Lighter(Item):
    name = "Lighter"
    value = 5
def Sharp_Stick(Weapon):
    name = "Sharp Stick"
    value = 5
    damage = 15
def startRoom():
    global inventory 
    global character_Cash
    global character_Health
    global character_Damage_No_Weapon
    global weapons
    global weapon_Choice
    global weapon_Add
    global item_Add
character_Health = 1000
inventory = []
character_Cash = 200.00
character_Damage_No_Weapon = random.randint(1, 15)
weapons = []
goblin_Damage = random.randint(1, 10)
wizard_Damage = random.randint(1, 50)

time.sleep(5)
print ('You are in a cottage in Loch Scyze in Scotland where there is a large wooden chest in the room')
time.sleep(5)
print ('Your character\'s HP is %d' % character_Health)
time.sleep(5)
print ('Your character has $%d' % character_Cash)
time.sleep(5)
print ('Press [o] to open chest or press [e] to exit cottage')
choice1 = input ('What is your choice? ')

if choice1 == "e" :
    print ('You have exited the cottage')
    time.sleep(5)
    print ('To go North press [n], East [e] or West [w]')
    choice2 = input ('What is your choice? ')

    '''if choice2 == "e" :
        print ('''







    if choice2 == "n" :
        print ('You have entered the woods')
        time.sleep(5)

        print ('Press [w] to equip weapon or [e] to fight barefist')
        choice6 = input()
        if choice6 == "w" :
            if weapons == [] :
                print ('You have no weapons yet!')
                time.sleep(2.5)
            else :
                print ('These are your weapons: ')
                print (weapons)
                weapon_Choice = input ('Which weapon do you want to use? Type in weapons[Numberinlist] ')
                del weapon_Choice


        goblin_Health = 50
        print ('You have discovered a goblin press [a] to attack or [p] to pay $10 to escape ')
        print ('The goblin\'s health is %d' % goblin_Health)
        if choice6 == "e" :
            print ('You have no weapon equipped')
        choice3 = input ('What is your choice? ')

        if choice3 == "p" :
            character_Cash -= 10
            print ('You have successfully escaped')
            print ('You now have $%d' % character_Cash)
            print ('To go North press [n]')
            choice4 = input ()



            if choice4 == "n" :
                print('You have moved North')
                time.sleep(2.5)
                print ('You hear a loud noise and start running')
                os.system("start F:\Python\Forest.mp3")
                time.sleep(16.5)
                print ('...')
                time.sleep(16.5)
                os.system("start F:\Python\Shotgun.mp3")
                time.sleep(1)
                os.system("start F:\Python\Shell_Falling.mp3")
                print ('You hear someone shoot at you, you keep running')
                time.sleep(1)
                os.system("start F:\Python\Forest.mp3")
                time.sleep(16.5)
                print ('...')
                time.sleep(16.5)
                print ('OH NO!!! You have run over a death trap set up by a hunter')          
                time.sleep(5)
                os.system("start F:\Python\gameover.wav")
                print('GAME OVER')
                time.sleep(5)
                sys.exit()


        if choice3 == "a" :
            while goblin_Health | character_Health >= 0 :
                if goblin_Health | character_Health <= 0 :
                    print ('The Goblin is dead!')
                    time.sleep(2.5)
                else:
                    print ('You take a hit at the goblin')
                    goblin_Health -= character_Damage_No_Weapon
                    os.system("start F:\Python\Punch_1.mp3")
                    if goblin_Health | character_Health <= 5 :
                        print ('The Goblin is dead!')
                        time.sleep(2.5)
                    else :
                        print ('The goblin\'s health is %d' % goblin_Health)
                        time.sleep(2)
                        print ('The goblin attacks you!')
                        os.system("start F:\Python\Punch_2.mp3")
                        character_Health -= goblin_Damage
                        print ('Your health is %d' % character_Health)
                        time.sleep(2)


if choice1 == "o" :
    print ('You have opened a chest')
    time.sleep(2.5)
    print ('In the chest there is a wooden sword, $27, a lighter and a sharp stick')
    print ('Type y to take the items or n to leave them')
    pickup1 = input()
    if pickup1 == "y":
        weaponadd(Wooden_Sword) 
        itemadd(Lighter)           
        weaponadd(Sharp_Stick)
        os.system("start F:\Python\Coin.wav")
        character_Cash += 27
        print ('This is your inventory:')
        print (inventory)
        print ('These are your weapons:')
        print(weapons)
        print ('This is your cash balance:')
        print ('$%d' % character_Cash)
        time.sleep(15)

else:
    print ('You leave the items in the chest')
print ('In your inventory there is:')
print (inventory)
print ('You have $%d' % character_Cash)
print ('You are still in the cottage')
time.sleep(5)
print ('Press [e] to exit cottage')
choice5 = input ()
if choice5 == "e" :
    print ('You have exited the cottage')