Sample solution for demo

swap_meet/clothing.py

@@ -0,0 +1,11 @@
+
+class Clothing:
+    def __init__(self, condition=0):
+        self.category = "Clothing"
+        self.condition = condition
+
+    def __str__(self):
+        return "The finest clothing you could wear."
+
+    def __repr__(self):
+        return f"{self.category} in {self.condition} condition"

swap_meet/decor.py

@@ -0,0 +1,8 @@
+class Decor:
+    def __init__(self, condition = 0):
+        self.category = "Decor"
+        self.condition = condition
+
+    def __str__(self):
+        return "Something to decorate your space."
+

swap_meet/electronics.py

@@ -0,0 +1,7 @@
+class Electronics:
+    def __init__(self, condition = 0):
+        self.category = "Electronics"
+        self.condition = condition
+
+    def __str__(self):
+        return "A gadget full of buttons and secrets."

swap_meet/item.py

@@ -0,0 +1,8 @@
+
+class Item:
+    def __init__(self, category=""):
+        self.category = category
+
+
+    def __str__(self):
+        return "Hello World!"

swap_meet/vendor.py

@@ -0,0 +1,58 @@
+class Vendor:
+
+    def __init__(self, inventory=[]):
+        self.inventory = inventory
+
+    def add(self, item):
+        self.inventory.append(item)
+        return item
+
+    def remove(self, item):
+        try:
+            self.inventory.remove(item)
+            return item
+        except ValueError as ve:
+            return False
+
+    def get_by_category(self, category):
+        return [item for item in self.inventory if item.category == category]
+
+    def swap_first_item(self, other_vendor):
+        if len(self.inventory) == 0 or len(other_vendor.inventory) == 0:
+            return False
+
+        my_first = self.inventory[0]
+        other_first = other_vendor.inventory[0]
+        self.remove(my_first)
+        other_vendor.remove(other_first)
+        self.add(other_first)
+        other_vendor.add(my_first)
+        return True
+
+    def get_best_by_category(self, category):
+        inv_by_category = [item for item in self.inventory if item.category == category]
+
+        if len(inv_by_category) == 0:
+            return None
+
+        print(inv_by_category)
+
+        max = inv_by_category[0]
+        for item in inv_by_category:
+            if item.condition > max.condition:
+                max = item
+
+        return max
+
+    def swap_best_by_category(self, other: 'Vendor', my_priority: str, their_priority: str):
+        my_best = self.get_best_by_category(their_priority)
+        their_best = other.get_best_by_category(my_priority)
+
+        if my_best is None or their_best is None:
+            return False
+
+        self.remove(my_best)
+        other.remove(their_best)
+        self.add(their_best)
+        other.add(my_best)
+        return True