A Shamelessly Simple E-Restaurant Order

Shopify gets your restaurant online fast. So you can keep cooking without sacrificing what matters.

To get started, a shamelessly simple open-source Python implementation of the above restaurant online order system is discussed.

The simplest restaurant online order system using Python functions is described as follows:

Check input numeric validation

def numeric_validation(value):
“”””
This function take an input as interger
and validate that it takes onlu numeric data.
“””
while True:
try:
val = int(input(value))
except:
print(‘Please use numeric digits.’)
continue
if val < 0:
print(‘Please enter a positive number.’)
continue
else:
break
return val

Add Order items

def order_items(orders):
order_items.total_price = 0
run = True
while run:
orderList = orders
items = numeric_validation(“Enter Item No:”)
if (items in orderList):
print(“Already ordered!!! Try Somthing New”)
continue
else:
items_no = int(items)
qty = numeric_validation(“Quantity:”)
order_items.total_price += (menue[items_no][‘price’] * qty)
orderList.append(menue[items_no][‘item’])
order = input(“Do you want to order more? y/n:”)
if order == ‘y’:
continue
else:
run = False
return order_items

Let’s start main function

print(“#”30+”\n Welcome To DigHiSci Cafe\n”+”#”30+ \
“\nPlease Chose your Order Number:”)

Declare Variables

menue = { 1:{“item”:”tea”,”price”:1},
2:{“item”:”coffee”,”price”:2},
3:{“item”:”sandwich”,”price”:4},
4:{“item”:”salad”,”price”:6}
}

orders = [] # issue it has to be a dictionary not a list
qty= 1

Show menu

for item,value in menue.items():
print(“No#”,item,”: Item: “,value[“item”].title(),”- Price:”+str(value[“price”])+”$”)
print(‘#’*30)

Add item

order_items(orders)
print(‘#’*30)

Show card list

print(“You ordered the following Items: “)
for i in range(len(orders)):
print(str(i+1)+”- “+orders[i].title())
print(“-“*30+”\nYour Total Price: “+str(order_items.total_price)+”$”)

End

print(‘#’*30+”\nGreat Thanks! Order Again.\n”)

Here is the result:

##############################
    Welcome To DigHiSci Cafe
##############################
Please Chose your Order Number:
No# 1 : Item:  Tea - Price:1$
No# 2 : Item:  Coffee - Price:2$
No# 3 : Item:  Sandwich - Price:4$
No# 4 : Item:  Salad - Price:5$
##############################
Enter Item No:1
Quantity:1
Do you want to order more? y/n:y
Enter Item No:2
Quantity:1
Do you want to order more? y/n:y
Enter Item No:3
Quantity:1
Do you want to order more? y/n:y
Enter Item No:4
Quantity:1
Do you want to order more? y/n:n
##############################
You have ordered the following Items: 
1- Tea
2- Coffee
3- Sandwich
4- Salad
------------------------------
Your Total Price: 12$
##############################
Great Thanks! Order Again.

Voilà!

Bon appétit!

Appendix: Full Script

# check input numeric validation
def numeric_validation(value):
    """"
    This function take an input as interger
    and validate that it takes onlu numeric data. 
    """
    while True:
        try:
            val = int(input(value))
        except:
            print('Please use numeric digits.')
            continue
        if val < 0:
            print('Please enter a positive number.')
            continue
        else:
            break
    return val
# Add Order items
def order_items(orders):
    order_items.total_price = 0
    run = True
    while run:
        orderList = orders
        items = numeric_validation("Enter Item No:")
        if (items in orderList):
            print("Already ordered!!! Try Somthing New")
            continue
        else:
            items_no = int(items)
            qty = numeric_validation("Quantity:")  
            order_items.total_price += (menue[items_no]['price'] * qty)
            orderList.append(menue[items_no]['item'])
            order = input("Do you want to order more? y/n:")
            if order == 'y':
                continue
            else:
                run = False
    return order_items   
## Start main function
print("#"*30+"\n    Welcome To DigHiSci Cafe\n"+"#"*30+ \
"\nPlease Chose your Order Number:")

# Declare Variables
menue = { 1:{"item":"tea","price":1},
2:{"item":"coffee","price":2},
3:{"item":"sandwich","price":4},
4:{"item":"salad","price":5}
}

orders = [] # issue it has to be a dictionary not a list
qty= 1

# Show menue
for item,value in menue.items():
    print("No#",item,": Item: ",value["item"].title(),"- Price:"+str(value["price"])+"$")
print('#'*30)

# Add item 
order_items(orders)
print('#'*30)

# Show card list
print("You have ordered the following Items: ")
for i in range(len(orders)):
    print(str(i+1)+"- "+orders[i].title())
print("-"*30+"\nYour Total Price: "+str(order_items.total_price)+"$")

#End    
print('#'*30+"\nGreat Thanks! Order Again.\n") 

• Example Output:

##############################
    Welcome To DigHiSci Cafe
##############################
Please Chose your Order Number:
No# 1 : Item:  Tea - Price:1$
No# 2 : Item:  Coffee - Price:2$
No# 3 : Item:  Sandwich - Price:4$
No# 4 : Item:  Salad - Price:5$
##############################
Enter Item No:1
Quantity:2
Do you want to order more? y/n:n
##############################
You have ordered the following Items: 
1- Tea
------------------------------
Your Total Price: 2$
##############################
Great Thanks! Order Again.