I am getting a key error when trying to print from my dictionary - keyerror

Question

I am getting a Key error "name" when i run the following code. I believe the name in my dictionary to be defined so i am unsure what the source of the error is.
'''
The task is broken down into three sections.
Section 1 - User Input
Section 2 - loop through the grocery list
Section 3 - provide output to the console
'''
Task: Create the empty data structure
grocery_item = {}
grocery_history = []
Variable used to check if the while loop condition is met
stop = False
while not stop :
#Accept input of the name of the grocery item purchased.
name = input("item Name:\n")
#Accept input of the quantity of the grocery item purchased.
quantity = input("quantity purchased:\n")
#Accept input of the cost of the grocery item input (this is a per-item cost).
cost = input("price per item:\n")
#Using the update function to create a dictionary entry which contains the name, number and price entered by the user.
grocery_item = {'item_name':(name), 'quantity':int(quantity), 'cost':float(cost)}
#Add the grocery_item to the grocery_history list using the append function
grocery_history.append(grocery_item)
#Accept input from the user asking if they have finished entering grocery items.
response = input("Would you like to enter another item?\n Type 'c' to continue or 'q' to quit:\n")
if response == 'q':
stop = True
Define variable to hold grand total called 'grand_total'
grand_total = 0
Define a 'for' loop.
for item in grocery_history:
#Calculate the total cost for the grocery_item.
item_total = item['quantity'] * item['cost']
#Add the item_total to the grand_total
grand_total += item_total
#Output the information for the grocery item to match this example:
#2 apple # $1.49 ea $2.98
print("{} {} # ${} ea {}" .format(item['quantity'], item['name'], item['cost'], item_total))
#Set the item_total equal to 0
item_total = 0
Print the grand total
print ("Grand Total: $"(grand_total))
Item name:
Quantity purchased:
Price per item:
Would you like to enter another item?
Type 'c' for continue or 'q' to quit:
Item name:
Quantity purchased:
Price per item:
Would you like to enter another item?
Type 'c' for continue or 'q' to quit:
Item name:
Quantity purchased:
Price per item:
Would you like to enter another item?

Answer 1

The name should be item_name, because this line:
grocery_item = {'item_name':(name), 'quantity':int(quantity), 'cost':float(cost)}
You assigned the input name to item_name.
Therefore, this line:
print("{} {} # ${} ea {}" .format(item['quantity'], item['name'], item['cost'], item_total))
should replace by :
print("{} {} # ${} ea {}" .format(item['quantity'], item['item_name'], item['cost'], item_total))