Question

I am having a hard time writing an IDLE code (Python 3.7.2) and I need help. Here are the parameters.

1. Write a program that will generate a random backpack. This program will have a menu that allows the

user to continuously select between generating a new backpack, printing the current backpack, adding a

given number of an item, removing a given number of an item or quitting. Every backpack will have a

variable number of the following 7 items: magic item, clothes item, food item, armor item, fire creation

item, weapon item, other item. You can use a two-dimensional list if you wish, but I suggest using two

lists. One list for the names of the items and a second list that holds the number of each item. Note:

removing an item should never result in a negative number of an item, it should just take it to zero.

Assume this is a super amazing backpack of holding so there is no maximum on any item

Answer 1

Program:

#class backpack
class backpack:
    #variables
    items=["magic","clothes","food","armor","fire_creation","weapon","other"]
    value=[0,0,0,0,0,0,0]
#main method definition
def main():
    #infinite loop
    while True:
        #showing options to users
        print "1. Create new backpack\n2. Print current backpack\n3. Add/Remove items to backpack\n4. Exit\n"
        #taking user input
        ch=input("Select an Option: ");
        if ch==1:
            #creating object
            b1=backpack();
            continue
        elif ch==2:
            ##printing the details of the backpack
            print b1.items[0],b1.value[0]
            print b1.items[1],b1.value[1]
            print b1.items[2],b1.value[2]
            print b1.items[3],b1.value[3]
            print b1.items[4],b1.value[4]
            print b1.items[5],b1.value[5]
            print b1.items[6],b1.value[6]
            continue
        elif ch==3:
            #adding or removing items
            print "1. Add items\n2. Remove items\n3. Exit\n"
            inp=input("Select an option: ")
            if inp==1:
                #adding items
                b1.value[0]=b1.value[0]+input("Magic: ")
                b1.value[1]=b1.value[1]+input("Clothes: ")
                b1.value[2]=b1.value[2]+input("Food: ")
                b1.value[3]=b1.value[3]+input("Armor: ")
                b1.value[4]=b1.value[4]+input("Fire: ")
                b1.value[5]=b1.value[5]+input("Weapon: ")
                b1.value[6]=b1.value[6]+input("Other: ")
            elif inp==2:
                #removing items
                m=input("Magic: ")
                c=input("Clothes: ")
                f=input("Food: ")
                a=input("Armor: ")
                fr=input("Fire: ")
                w=input("Weapon: ")
                o=input("Other: ")
                if m>b1.value[0] or c>b1.value[1] or f>b1.value[2] or a>b1.value[3] or fr>b1.value[4] or w>b1.value[5] or o>b1.value[6]:
                    #showing error message
                    print "Selected item values cannot be removed. Try again..."
                else:
                    b1.value[0]=b1.value[0]-m;
                    b1.value[1]=b1.value[1]-c;
                    b1.value[2]=b1.value[2]-f;
                    b1.value[3]=b1.value[3]-a;
                    b1.value[4]=b1.value[4]-fr;
                    b1.value[5]=b1.value[5]-w;
                    b1.value[6]=b1.value[6]-o;
            else:
                break
            continue
        else:
            print "The option is invalid. Exiting..."
            break
#calling main function
if __name__ == '__main__':
    main()

Output

1. Create new backpack
2. Print current backpack
3. Add/Remove items to backpack
4. Exit

Select an Option: 1
1. Create new backpack
2. Print current backpack
3. Add/Remove items to backpack
4. Exit

Select an Option: 2
magic 0
clothes 0
food 0
armor 0
fire_creation 0
weapon 0
other 0
1. Create new backpack
2. Print current backpack
3. Add/Remove items to backpack
4. Exit

Select an Option: 3
1. Add items
2. Remove items
3. Exit

Select an option: 1
Magic: 1
Clothes: 2
Food: 3
Armor: 4
Fire: 5
Weapon: 6
Other: 7
1. Create new backpack
2. Print current backpack
3. Add/Remove items to backpack
4. Exit

Select an Option: 2
magic 1
clothes 2
food 3
armor 4
fire_creation 5
weapon 6
other 7