Bits and Pizzas | Python Fiddle

pizzas = {
    "Margherita" : 9.99,
    "Mighty Meaty" : 12.99,
    "Vegetarian Supreme": 10.99,
    "Hawaiian": 11.99
}

order=[]
running_total=[]
#calls the function to see whether the pizza exists
#This will loop round until the function returns a pizza name
#Once a valid pizza is found, the while loop will exit and the menu item will be added to the order
#Print the order to see what is happening so far.
#find the correct pizza and adds the price to the running total list
#calls the nextOrder function to see whether the user wants another pizza
def placeOrder():
    order_item=raw_input("What would you like?")    
    print menuCheck(order_item)
    
    while menuCheck(order_item)==None:
        order_item=raw_input("Sorry, this is not on the menu. Try something else")

order.append(order_item)
    print order
    
    for i in pizzas:
        if i==order_item:
            running_total.append(pizzas[i])
            print running_total

nextOrder()

#Asks the user if they want to order again
#lower used to make user input lower caase.
#If the user says yes, then call the place order function
def nextOrder():
    user_input=raw_input("Would you like to place another order")
    if user_input.lower()=="y":
        placeOrder()
                 
#This function is used in conjunction with placeOrder
#If the user has entered a valid pizza, then it will return the value of order_item back to the order
#if not, the the function will return nothing
def menuCheck(order_item):
    for i in pizzas:
        if order_item == i:
            return order_item

#Set the total to 0
#loop through the running_total list
#Each time increment the value of i to the total
def checkout():
    total = 0
    for i in running_total:
        total+=i
    print total

print "Welcome to Bitz 'n' Pizzas - The number one Pizza service. Select an item from our menu below:"

print pizzas
##
###prints one line of the dictionary at a time
##for i in pizzas.iteritems():
##    print i
##
###concatenates the dictionary items together
##for i in pizzas:
##    print str(i) + " " + str(pizzas[i])

for i in pizzas:
    print i
    print pizzas[i]

placeOrder()
checkout()

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