McDonald's food order system
PEP 8

Line length

E501:11:80:line too long (107 &gt; 79 characters)
E501:19:80:line too long (110 &gt; 79 characters)


Odd spacing

E222:36:58:multiple spaces after operator


No newline at end

W292:36:71:no newline at end of file


General comments

Main

You want to use __name__ to allow importing without running your code. This explains it better

def main():
    # my code here

if __name__ == "__main__":
    main()


Storing food items

A = ["Big Mac", float(2.50), 50], ["Large Fries", float(0.50), 200], ["Vegetarian Burger", float(1.00), 20]


This may be better represented as either instances of a class, or just namedtuples, making the code more readable, as you access them by name a dictionary may clean up the code for this, rather than a list