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GeezerVison is showing github.com — Python/other/greedy.py at master · https-github-com-nzysoft/Python

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class Things:
def __init__(self, name, value, weight):
self.name = name
self.value = value
self.weight = weight
def __repr__(self):
return f"{self.__class__.__name__}({self.name}, {self.value}, {self.weight})"
def get_value(self):
return self.value
def get_name(self):
return self.name
def get_weight(self):
return self.weight
def value_weight(self):
return self.value / self.weight
def build_menu(name, value, weight):
menu = []
for i in range(len(value)):
menu.append(Things(name[i], value[i], weight[i]))
return menu
def greedy(item, max_cost, key_func):
items_copy = sorted(item, key=key_func, reverse=True)
result = []
total_value, total_cost = 0.0, 0.0
for i in range(len(items_copy)):
if (total_cost + items_copy[i].get_weight()) <= max_cost:
result.append(items_copy[i])
total_cost += items_copy[i].get_weight()
total_value += items_copy[i].get_value()
return (result, total_value)
def test_greedy():
"""
>>> food = ["Burger", "Pizza", "Coca Cola", "Rice",
... "Sambhar", "Chicken", "Fries", "Milk"]
>>> value = [80, 100, 60, 70, 50, 110, 90, 60]
>>> weight = [40, 60, 40, 70, 100, 85, 55, 70]
>>> foods = build_menu(food, value, weight)
>>> foods # doctest: +NORMALIZE_WHITESPACE
[Things(Burger, 80, 40), Things(Pizza, 100, 60), Things(Coca Cola, 60, 40),
Things(Rice, 70, 70), Things(Sambhar, 50, 100), Things(Chicken, 110, 85),
Things(Fries, 90, 55), Things(Milk, 60, 70)]
>>> greedy(foods, 500, Things.get_value) # doctest: +NORMALIZE_WHITESPACE
([Things(Chicken, 110, 85), Things(Pizza, 100, 60), Things(Fries, 90, 55),
Things(Burger, 80, 40), Things(Rice, 70, 70), Things(Coca Cola, 60, 40),
Things(Milk, 60, 70)], 570.0)
"""
if __name__ == "__main__":
import doctest
doctest.testmod()
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