Cannot unpack non-iterable int object

I need to use __getitem__ for all 7 arguments in my class but __getitem__ won’t let me so I tried to use a tuple but I keep getting this error:

TypeError: cannot unpack non-iterable int object

What should I do?

def __getitem__(self, key):
    name,author,category,Isbn_number,printing_house,date,number_of_order = key
    return (self.name,self.author,self.category,self.Isbn_number,self.printing_house,self.date,self.number_of_order)

Answer

To make a getitem that returns the contents of each of the member variables given a key that is the same as the name of that member, you could have the class store the information in a dict and have your get_item return from that dict. E.g.:

class Book():
    def __init__(self, name='Jud', author='Jill', category='YA'):
        self.elements = {'name': name, 'author': author, 'category': category}

    def __getitem__(self, key):
        return self.elements[key]

Then with an instance of the class you should be able to do things like:

book = Book()
book['name']
book['author']