zrobione afla cięcie

item.py

@@ -0,0 +1,15 @@
+import random
+
+
+class Item:
+    def __init__(self):
+        self._waga = random.randint(1, 6)
+        self._wartosc = random.randint(5, 10)
+
+    @property
+    def waga(self):
+        return self._waga
+
+    @property
+    def wartosc(self):
+        return self._wartosc

main.py

@@ -0,0 +1,38 @@
+from plecak import *
+import copy
+
+l = 4
+dostepne = [Item() for _ in range(l)]
+
+for x in dostepne:
+    print(x.waga, x.wartosc)
+
+cap = 10
+
+
+def knapsack(dostepne, cap):
+    def rekurencja(i, waga, val, alfa):
+        nonlocal max_val
+
+        if i >= len(dostepne) or waga==cap:
+            if val > max_val:
+                max_val = val
+            return
+
+        if val >= alfa:
+            return
+
+        if waga + dostepne[i].waga <= cap:
+            rekurencja(i+1, waga + dostepne[i].waga, val + dostepne[i].wartosc, alfa)
+
+        rekurencja(i+1, waga, val, alfa)
+
+    max_val = float("-inf")
+    rekurencja(0, 0, 0, 25)
+    return max_val
+
+
+best = knapsack(dostepne, cap)
+
+
+print("----------\n" + f'wartość plecaka: {best}\n')

plecak.py

@@ -0,0 +1,51 @@
+from item import *
+
+
+class Plecak:
+    def __init__(self):
+        self._capacity = 10
+        self._value = 0
+        self._items = []
+        self._waga = 0
+
+    @property
+    def capacity(self):
+        return self._capacity
+
+    @property
+    def value(self):
+        return self._value
+
+    @property
+    def items(self):
+        return self._items
+
+    @property
+    def waga(self):
+        return self._waga
+
+    @capacity.setter
+    def capacity(self, val):
+        self._capacity = val
+
+    @value.setter
+    def value(self, val):
+        self._value = val
+
+    @items.setter
+    def items(self, lista):
+        self._items = lista
+
+    @waga.setter
+    def waga(self, val):
+        self._waga = val
+
+    def addItem(self, item: Item):
+        if item not in self.items:
+            self._items.append(item)
+            self._value += item.wartosc
+            self._waga += item.waga
+        return self
+
+    def filled(self):
+        return True if self.waga == self.capacity else False