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  1. class product:
  2.     def __init__(self, ID: str, name: str, price: int, man_name: str) -> None:
  3.         self.id = ID
  4.         self.name = name
  5.         self.price = price
  6.         self.man_name = man_name
  7.  
  8.     # get the string representation of the product
  9.     def __str__(self) -> str:
  10.         return "Product ID:\t\t" + self.id + "\nProduct Name:\t\t" + \
  11.             self.name + "\nProduct Price:\t\t" + str(self.price) + \
  12.                 "\nManufacturer Name:\t" + self.man_name
  13.  
  14.     # compare if the two products are the same
  15.     def __eq__(self, b) -> bool:
  16.         if self.id == b.id and self.name == b.name and \
  17.             self.price == b.price and self.man_name == b.man_name:
  18.             return True
  19.         return False
  20.  
  21.     # the same way ne method
  22.     def __ne__(self, b) -> bool:
  23.         if self.id != b.id or self.name != b.name or \
  24.             self.price != b.price or self.man_name != b.man_name:
  25.             return True
  26.         return False
  27.  
  28.     # we override the __hash__ magic method which is useful in sets
  29.     # if two elements have same hash they are equal
  30.     def __hash__(self):
  31.         return hash(self.id)
  32.  
  33.     # get the id of the product
  34.     def getID(self):
  35.         return self.id
  36.  
  37.     # get the name of the product
  38.     def getName(self):
  39.         return self.name
  40.  
  41.     # get the price of the product
  42.     def getPrice(self):
  43.         return self.price
  44.  
  45.     # get the manufacturer name
  46.     def getManufacturerName(self):
  47.         return self.man_name
  48.  
  49. if __name__ == '__main__':
  50.     prodList = [ 
  51.         product('d', 'e', 2, 'f'),
  52.         product('a', 'b', 1, 'c'),
  53.         product('m', 'n', 5, 'o'),
  54.         product('p', 'q', 6, 'r'),
  55.         product('j', 'k', 4, 'l'),
  56.         product('s', 't', 7, 'u'),
  57.         product('g', 'h', 3, 'i'),
  58.         product('v', 'w', 8, 'x'),
  59.     ]
  60.  
  61.     pricesort = sorted(prodList, key = lambda a: a.price)
  62.     # for prod in pricesort:
  63.     #     print(prod)
  64.     #     print("==========================")
  65.  
  66.     # print("-----------------------------------------------------")
  67.     # revpricesort = sorted(prodList, key = lambda a: a.price)[::-1]
  68.     # for prod in revpricesort:
  69.     #     print(prod)
  70.     #     print("==========================")
  71.  
  72.     prodListB = [
  73.         product('a', 'b', 8, 'c'),
  74.         product('m', 'n', 56, 'o'),
  75.         product('aa', 'bb', 45, 'c'),
  76.         product('bb', 'ds', 65, 'o'),
  77.         product('zz', 'vv', 71, 'c'),
  78.         product('ff', 'df', 59, 'o'),
  79.     ]
  80.  
  81.     # implement the append part
  82.  
  83.     # implement the slicing part
  84.  
  85.     prodList.extend(prodListB)
  86.     print(hash(prodList[1]) == hash(prodListB[0]))
  87.     print(len(set([prodList[1], prodListB[0]])))
  88.  
Success #stdin #stdout 0.02s 9056KB
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https://ideone.com/JUymFw
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
public

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