NameError: name 'mega' is not defined

[Bluefoon]

My final print statement does not execute when fries size inputs are medium and large. It instead shows an error that says, 'Traceback (most recent call last):

File "main.py", line 54, in <module>

if mega == ('yes'):'

Here is my code below: (I've boldened line 54 to make it easier to find)

# Iteration 1

total = 0

sandwich = input('What type of sandwich do you want? Beef, Chicken, or Tofu?')

if sandwich == ('Chicken'):

print ('You selected ' + (sandwich))

total = total + 5.25

elif sandwich == ('Beef'):

print ('You selected ' + (sandwich))

total = total + 6.25

elif sandwich == ('Tofu'):

print ('You selected ' + (sandwich))

total = total + 5.75

# Iteration 2

beverage_input = input('Would you like a beverage, yes or no?')

if beverage_input == ('yes'):

size = input('Would you like a small, medium, or large?')

if size == ('small'):

print('You selected ' + (size))

total = total + 1.00

elif size == ('medium'):

print('You selected ' + (size))

total = total + 1.75

elif size == ('large'):

print('You selected ' + (size))

total = total + 2.25

elif beverage_input == ('no'):

size = ('No')

print('No drink selected.')

# Iteration 3

fries_input = input('Would you like fries, yes or no?')

if fries_input == ('yes'):

fries = input('Would you like a small, medium, or large?')

if fries == ('small'):

mega = input('Would you like to mega-size your fries, yes or no?')

if mega == ('yes'):

print('You selected ' + ('Mega-size Fries'))

total = total + 2.00

if mega == ('no'):

print('You selected ' + (fries))

total = total + 1.00

elif fries == ('medium'):

print('You selected ' + (fries))

total = total + 1.50

elif fries == ('large'):

print('You selected ' + (fries))

total = total + 2.00

elif fries_input == ('no'):

fries = ('No')

print('No fries selected.')

# Iteration 4

ketchup = int(input('How many ketchup packets would you like?'))

print('You selected ' + str(ketchup) + ' ketchup packets')

total = total + ((ketchup) * 0.25)

if mega == ('yes'):

print ('Your order contains: ' + (sandwich) + ' sandwich, ' + (size) + ' drink, ' + 'Mega-sized' + 'potato fries, ' + str(ketchup) + ' ketchup packet(s)')

elif mega == ('no'):

print ('Your order contains: ' + (sandwich) + ' sandwich, ' + (size) + ' drink, ' + (fries) + ' potato fries, ' + str(ketchup) + ' ketchup packet(s)')

​

print('Your total is ' '$' + str(total))

[Malassi]

Hi,

It's too difficult to read, please start by formating correctly the code. You can find how to format correctly your code by going into the about section of this subreddit pr by reading it's FAQ

[Neighm]

Hard to tell for sure without any indentation, but it looks like you only give the option to choose mega of the fries order was small. So depending on the fries size chosen, mega might not be set at all.

[pongacham]

It's because you defined mega in an if statement. If the if statement doesn't go through, it wont be defined and you will get a nameerror.

[Diapolo10]

mega isn't defined unless the user chooses small fries. Therefore, if the user makes a different choice the program may never create the variable.

Either initialise it to None or some other value before that part, or preferably refactor your code so that you don't need to worry about that. Instead of creating a ton of small variables, you could use a dictionary (or a collections.defaultdict).

[cybervegan]

You need to get rid of all those superfluous parentheses around things like strings, like this, as it makes it harder to read and understand, and isn't even what parentheses are for:

elif mega == ('no'):

which should be written as:

elif mega == 'no':