from operator import attrgetter
from pprint import pprint
 
class Product(object):
    def __init__(self, number, name, supplier_name, supplier_id, quantity=0):
        self.number = number
        self.name = name
        self.supplier_name = supplier_name
        self.supplier_id = supplier_id
        self.quantity = quantity
    def __repr__(self):
        data = (self.number, self.name, self.supplier_name, 
            self.supplier_id, self.quantity)
        return repr(data)
    def __lt__(self, other):
        return self.number < other.number
    def __eq__(self, other):
        return self.number == other.number
    def __hash__(self):
        return hash(self.number)
    by_number = attrgetter('number')
    by_name = attrgetter('name')
    by_supplier_name = attrgetter('supplier_name')
    by_supplier_id = attrgetter('supplier_id')
    by_quantity = attrgetter('quantity')
 
stock_set = {
    Product(1004, 'Clapper', 'Joseph Enterprises', 888, 32), 
    Product(1002, 'Chia Elmer Fudd', 'Joseph Enterprises', 888, 56), 
    Product(1006, 'Veg-O-Matic', 'Ronco', 999, 9), 
    Product(1003, 'Pocket Fisherman', 'Ronco', 999, 17), 
    Product(1007, 'Bass-O-Matic', 'Dan Aykroyd', 666, 25), 
    Product(1005, 'Phone Glove', 'Craig Ferguson', 777), 
    Product(1001, 'Clapper Plus', 'Joseph Enterprises', 888, 44), 
}
pprint(stock_set)
pprint(sorted(stock_set, key=Product.by_name))
most = max(stock_set, key=Product.by_quantity)
print(most.number)
print()
 
stock_dict = {prod.number:prod for prod in stock_set}
pprint(stock_dict)
pprint(sorted(stock_dict.values(), key=Product.by_name))  # pass dict values!
most = max(stock_dict.values(), key=Product.by_quantity)  # pass dict values!
print(most.number)
print(stock_dict[most.number])
 

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