Cannot unpack non-iterable int object

Question

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)

Solution

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.:

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:

aBook['name']
aBook['author']

Comments

[pangyuteng]

see stackoverflow.com/questions/43627405/…

[Umut K.]

I dont get it ı mean ı understand(kinda) how getitem works but ı need to use getitem method for getting 7 arg in key cause ı want tu use a sorting function for my objects so ı need my objects to return as keys

[pangyuteng]

i recommend just creating your own custom get method, no need to pass in any arguments to the method nor even follow the python __getitem__ convention.

[Umut K.]

but ı dont know how yo use a get method but ı tried and then ı figured out my args are all str so dict.get cant receive them